Senba Sensing Technology Co., Ltd.

Temperature Measurement Accuracy of Infrared Thermopile Sensor at Different Distances(2021年05月16日)

senbasensor — 2021-05-10T11:55:29+0900

https://www.senbasensor.com/temperature-measurement-accuracy-of-infrared-thermopile-sensor-at-different-distances.html

Infrared thermopile sensor combined with Fresnel lens can greatly enhance its detection range. In general, the maximum distance of detecting the surface temperature of human body can reach 6-10m under ideal conditions.

The distance coefficient ratio can be expressed as D:S, that is to say, if the object (eg: circle) is D away from the detector, the temperature measurement is accurate as long as the diameter of it is greater than S. If the diameter of the object is less than S or the shape of the object is irregular, part of the infrared signal received by the infrared thermopile sensor will show the ambient temperature behind the object, which will cause the obtained temperature to be lower or higher (usually lower). If the detection distance is less than D, it will be reduced according to the proportion of D:S. Therefore, the closer the detection distance is, the higher the probability of measurement accuracy is.

In general, as long as the object is large enough or the object is fully covered by detection spots, the detection accuracy will not be affected by the distance.

For the new thermoprobe, the detection accuracy is generally ± 1.5℃; for the internal sensor, if the influence of Fresnel lens, mounting cavity and subsequent circuit design is eliminated, the maximum detection accuracy is ± 0.1℃.

For ear thermometer, the detection distance between the sensor and the inner ear is very close, so it can be directly used for temperature measurement without adding Fresnel lens. At this time, the measurement accuracy is greatly improved. However, due to the different design structure of the ear thermometer probe shell, the temperature measurement accuracy will be different. Generally speaking, the temperature measurement accuracy of the ear temperature gun is within ± 0.2℃~ ± 0.3℃, while the detection accuracy of the sensor can still reach ± 0.1℃.

Senba is one of professional pir sensor manufacturers. We provide Infrared Thermopile Sensor, Digital PIR Sensor, motion sensor china and so on. Want to know more? Please contact us.

The Adaptability of Infrared Thermopile Sensors To The Environment(2021年05月15日)

senbasensor — 2021-05-10T11:54:52+0900

https://www.senbasensor.com/the-adaptability-of-infrared-thermopile-sensors-to-the-environment.html

Fog, rain and dust rather than night and day will affect the accuracy of temperature measurement of infrared thermopile sensor. The reason is that the infrared light will be attenuated to some extent under these conditions, but its attenuation will not be very large. Generally, the actual temperature measurement accuracy will not be greatly affected. The infrared probe has also been applied in the fire-fighting and fog conditions.

Effect: dust ＞ rain ≈ fog.

The situation of weather change is quite complex. If the temperature is not changed suddenly, but changed slowly in winter and summer, day and night, and inside and outside the house, the resistance of the infrared thermopile sensor measuring the ambient temperature will make compensation, and the subsequent circuit will calculate this compensation and convert it to the actual temperature measurement value. Under this circumstance, the weather change or the environmental temperature change will not affect the temperature measurement of the sensor. The other case is sudden temperature change, that is, fire baking, putting into the refrigerator, facing the fan, throwing into the water, covering with hands, and there being a heat source near the PCB sensor, etc. In this case, the sensor will appear the phenomenon of "heat shock", that is, the temperature measurement will be inaccurate or drift in a short time without reaching the thermal balance, which is possible to all thermoelectric reactor sensors rather than just our products. The main reason is that the sensor is packaged with TO metal tube shell. When the sensor is used in the sudden temperature change environment mentioned above, the TO tube wall will also undergo intense heat exchange, resulting in sudden heat or sudden cooling of the tube wall. Then the TO tube wall will also produce infrared radiation under temperature change, which is received by the sensor, forming thermal noise signal. Next, the signal is superimposed with the infrared radiation of the actual measured object through the filter, and makes the temperature measurement of the sensor inaccurate.

Therefore, in order to avoid the above situation, the TO packaged sensor is usually placed in the specific product shell to increase the heat capacity of the temperature measurement system and improve its resistance to "heat shock" phenomenon, such as ear thermometer and new thermoprobe. Of course, if the applied occasions can avoid the above situation, you can also consider directly using them.

Senba Sensing Technology Co Ltd is one of professional pir sensor manufacturers. We provide Infrared Thermopile Sensor, Digital PIR Sensor, passive infrared sensor and so on. Want to know more? Please contact us.

Introduction to Photoresist Sensor of Photoelectric switch(2021年05月14日)

senbasensor — 2021-05-10T11:54:14+0900

https://www.senbasensor.com/introduction-to-photoresist-sensor-of-photoelectric-switch.html

The optical resistance sensor of photoelectric switch refers to the sensor made of the piezoresistive effect of monocrystalline silicon material and integrated circuit technology.

The photoresist effect means that when the force acts on the silicon crystal, the lattice of the crystal deforms to scatter the carrier from one energy valley to another, which changes the mobility of the carrier and affects the average longitudinal and transverse amount of the carrier. Thus, the resistivity of silicon changes. This change varies with the orientation of the crystal, so the piezoresistive effect of silicon is related to the orientation of the crystal.

The resistivity of monocrystalline silicon material will change after being subjected to force, and the electrical signal output proportional to the force change can be measured by measuring circuit, and results contribute to analyze the magnitude of the applied force accordingly.

The diffusion silicon optical force sensor integrates the resistance strip on the monocrystalline silicon film by integrated process, and makes the silicon photoresist chip, which is fixed in the shell, and then leads out the electrode lead, so that the measured external force can be felt through the silicon film. One side of the silicon film is a high-pressure cavity connected with the measured pressure, and the other side is a low-pressure cavity connected with the atmosphere. There are four resistance bars connected to the whole bridge in the silicon film domain, two of which are located in the light stress region and two in the tensile stress region, which are symmetrical relative to the center of the diaphragm.

The principle of photoresistor sensor is to convert the input mechanical strain into resistance value change. The input of resistance converter is the relative change of material length, it is a relative value without denier, and the output of resistance converter is the relative change of resistance value.

To measure other physical quantities, strain gauge will be put the on the corresponding elastic element, convert the change of these physical quantities into the strain of the elastic element, and finally convert the strain into the resistance output through the strain gauge.

Senba Sensing Technology Co.,Ltd. is one of professional pir sensor manufacturers. We provide Infrared Thermopile Sensor, Digital PIR Sensor, passive ir motion sensor and so on. Want to know more? Please contact us.

What is the Difference between a Thermopile Sensor and a Pyroelectric Sensor(2021年05月13日)

senbasensor — 2021-05-10T11:53:39+0900

https://www.senbasensor.com/what-is-the-difference-between-a-thermopile-sensor-and-a-pyroelectric-sensor.html

Nowadays thermopile reactor sensors and pyroelectric sensors commonly used in daily life. However, are they sharing the same scientific principles? What are the differences between them?

Knowledge of Thermopile sensor
(1) Introduction
A thermopile reactor is a component that converts temperature difference and electric energy into each other. It consists of two or more thermocouples connected in series. The thermopile potential output is superimposed on each other, which can be used to measure slight temperature difference or average temperature.

When the temperature is measured by the thermopile sensor, the potential difference generated by a single thermocouple is too small to be measured, and the large expense of using high precision operational amplifier can be saved.

(2) Structure
Structurally, the thermopile stack consists of multiple thermocouples. The radiation receiving surface is divided into several blocks, each of which is connected by a thermocouple. According to different uses, the practical thermopile reactor can be made into filament type and film type, and can also be made into multi-channel type and array type devices.

(3) Applications
the thermopile infrared detector can be configured with various lenses and filters in various application scenarios such as temperature measurement, qualitative/quantitative analysis of gas composition, medical equipment, etc.

At present, it has been widely used in the fields of forehead temperature gun, ear temperature gun, intelligent home appliance, lamp switch, food temperature detection and so on!

Knowledge of Thermal Release Sensor
(1) Introduction
Let's start with what pyroelectric effect means.

When some crystals are heated, such as Lithium tantalate, triglycopeptide sulfate, the two ends of the crystal will produce an equal number of charges with opposite symbols. Brewster formally named this phenomenon "pyroelectric" in year 1842. Infrared pyroelectric sensor is a thermopile infrared sensor based on pyroelectric effect.

(2) Structure
The infrared sensor consists of three parts: sensitive unit, impedance converter and filter window. The compensated pyroelectric sensor also has a temperature compensation element. In order to prevent the external environment from interfering with signal output, the above components are vacuum encapsulated in a metal camp.

(4) Applications
Pyroelectric materials have been widely used in human induction, security alarm, flame detection, noxious gas analysis and many other fields.

Senba Sensing Technology Co.,Ltd. is one of professional pir sensor manufacturers. We provide Infrared Thermopile Sensor, Digital PIR Sensor, intelligent pir sensor, senba sensor and so on. Want to know about more? Please contact us.

The Structure of the Original Mobile Phone Flash is Based on the Principle of Fresnel Lens(2021年05月12日)

senbasensor — 2021-05-10T11:53:01+0900

https://www.senbasensor.com/the-structure-of-the-original-mobile-phone-flash-is-based-on-the-principle-of-fresnel-lens.html

Fresnel lenses are mostly thin sheets made of polyolefin materials. One side of the lens surface is smooth, and the other side is engraved with concentric circles from small to large.

The rings on the flash of the mobile phone come from a Fresnel lens. The purpose of the flash is to illuminate the subject in front. In order to make full use of the light emitted by the lamp tube, we need to focus these lights forward. For the light emitted to the back of the tube, people first think of using a concave reflector, but the light (yellow) that the concave reflector shoots toward the front and the side is only a small part, that is, the light that is really straight forward can be illuminated. The light from other directions was all lost when shooting the subject; although the later deepened mirror improved the problem of light emission, it greatly increased the thickness of the flash, and some light (indicated in blue) was still lost.

In pursuit of ultra-thin mobile phones, people use thinner Fresnel lenses instead of convex lenses. This magical lens is much thinner than convex lenses but can achieve the same optical path as convex lenses. In addition to being thinner, Fresnel lens also has less chromatic aberration. Therefore, many flashes (including mobile phones) will use a shallower reflective concave mirror and Fresnel lens to achieve the effect of "light from any direction converges forward".

Senba Sensing Technology Co.,Ltd. is one of professional pir sensor manufacturers. We provide Infrared Thermopile Sensor, Digital PIR Sensor, passive ir motion sensor, pir sensor for sale, pir temperature sensor, light variable resistor and so on. Want to know about chinese pir? Please contact us.

Why Infrared Sensors are in Short Supply So Far？(2021年05月11日)

senbasensor — 2021-05-10T11:52:26+0900

https://www.senbasensor.com/why-infrared-sensors-are-in-short-supply-so-far.html

In 2020, the new crown pneumonia epidemic has caused products such as forehead thermometers and sensors that are usually unpopular or even unknown to appear. From crazy reselling to now gradually cooling down as the epidemic dissipates. As the core component of the forehead thermometer, how should the infrared sensor develop?

The infrared sensor is the core component of the forehead thermometer. With the increasingly serious and complex changes in the epidemic situation, the infrared sensor has become a hard-to-find product in the market. Why is infrared sensor so scarce?

First of all, the radiation characteristics of the infrared sensor, the size of the radiation energy, and the wavelength distribution are closely related to the surface temperature of the object. Conversely, by measuring the infrared energy radiated by the object itself, its surface temperature can be accurately predicted. This is the mechanism of infrared radiation temperature measurement.

Secondly, the market determines the supply and demand for infrared sensors. As one of the important detection equipment for epidemic screening, diagnosis, and prevention and control, the forehead thermometer has the advantages of safety, speed, high accuracy, and intuitive readings, and has been widely used in medical, public health, and other scenarios.

Senba Sensing Technology Co., Ltd. relies on 15 years of work experience to continuously improve technology, improve product quality, and strive to explore opportunities for other industrial sensors, only to provide customers with the highest quality products and services. Welcome to cooperate with us!

Senba Sensing Technology Co.,Ltd. is one of professional pir sensor manufacturers. We provide Infrared Thermopile Sensor, Digital PIR Sensor, passive infrared sensor, digital pir sensor, pir sensor analog output and so on. Want to know about types of pir sensor? Please contact us.

Development Prospect of Photosensitive Resistance(2021年05月10日)

senbasensor — 2021-05-10T11:51:44+0900

https://www.senbasensor.com/development-prospect-of-photosensitive-resistance.html

Photosensitive resistance is also known as light pipe, and the characteristic of photosensitive resistance is that under the irradiation of specific light, its resistance value decreases rapidly and can be used to detect visible light. Photoresistor is a kind of resistance made by the photoelectric effect of semiconductor, whose resistance value changes with the intensity of incident light; if the incident light is strong, the resistance decreases, and if the incident light is weak, the resistance increases. For example, a photoresistor is used in the sound control lamp as a device to control the light during the day.

Photoresistors are generally used for light measurement, light control, and photoelectric conversion (converting changes in light into changes in electricity). Generally, photoresistors are made into a thin sheet structure to absorb more light energy.

With the expansion of application areas, the photoresistor industry also faces many problems. Good market prospects have attracted many manufacturers, and fierce competition has reduced profit margins. This will inevitably force a group of manufacturers with low output and small market share to withdraw from the market.

If professional manufacturers want to make greater progress in this fiercely competitive field, they must first increase investment in improving product quality and better solve stability and reliability. Secondly, we must develop new varieties to broaden the application fields. At present, there is few kinds of photoresistor products on the international market, and more than 99% are polycrystalline. Efforts should be made to automate the production process to improve product consistency, reduce production costs, and strive for greater profitability.

Senba Sensing Technology Co.,Ltd. is one of professional pir sensor manufacturers. We provide Infrared Thermopile Sensor, Digital PIR Sensor, intelligent pir sensor, thermopile temperature sensor, pyroelectric passive infrared sensor and so on. Want to know about types of light dependent resistor and pir china? Please contact us.

Non Contact Thermometer(2020年02月02日)

senbasensor — 2020-01-22T16:15:54+0900

https://www.senbasensor.com/non-contact-thermometer.html

Non contact temperature measurement solution

The traditional body temperature measurement is a contact measurement using a mercury thermometer, which has the advantages of stable performance and small error, but has the disadvantages of long measurement time, high risk of cross-contamination, and easy to cause mercury poisoning due to glass breakage.

Infrared ear thermometer is the most commonly used thermometer. It can test body temperature with a slight amount of forehead or ear, and it can also prevent body infection. Infrared ear thermometer collects infrared radiation from ear cavity and tympanic membrane through infrared sensor. And converted into a digital signal, the main control CPU unit converts the digital signal into a temperature value and displays it on the LCD screen. Compared with mercury thermometers, infrared ear thermometers have the advantages of high precision, high resolution, fast measurement speed, easy operation, safety and comfort.

Now the country is also banned from mercury production. I believe that the application of non contact temperature measurement sensors will become more and more extensive in the future.

Senba Sensing Technology Co.,Ltd., was founded in 2005, with the focus on producing the top quality intelligent pir sensor. If you want to know more details, just feel free to contact us!

Burglar Alarm System(2020年02月01日)

senbasensor — 2020-01-22T16:15:10+0900

https://www.senbasensor.com/burglar-alarm-system.html

Security anti-theft solution

With the continuous improvement of people's living standards, people's demand for family life comfort is getting stronger and stronger. People tend to consider the safety of home in the first place. This kind of smart home mainly consists of visual intercom door machine and various detectors. The composition is connected to the smart home management machine. Once the alarm button is triggered, the burglar alarm pir receives the signal and performs as an alarm to remind the user.

The highest level of consumer acceptance in the smart home market is undoubtedly the security system, a complete security system including alarm system, video surveillance and video intercom.

After years of experience, the solution is applied to human body infrared sensor products. It is strongly recommended that you use the following models.

As one of the most professional pir sensor manufacturers in China, Senba Sensing Technology Co.,Ltd., was founded in 2005, with the focus on producing the top quality photoelectric components. If you want to know more details, just feel free to contact us!

Smart Light(2020年01月31日)

senbasensor — 2020-01-22T16:14:36+0900

https://www.senbasensor.com/smart-light.html

Intelligent lighting solutions

The role of lighting in every family is self-evident. Regardless of the family, leaving the lighting, it is like returning to the ancient times hundreds of years ago, which brought a lot of inconvenience to our lives. It is undoubtedly a terrible thing for modern people to leave the life of lighting. Therefore, many scholars have defined the invention of incandescent lamps as one of the symbols of modern civilization. With the invention of incandescent lamps, various lighting devices began to enter thousands of households.

Thus, a lighting system has been formed in each family. Later, due to the use of various lamps, there was a certain change in the light and shade of the light. However, because it adopts the traditional local style, the control method of opening and closing, it restricts the fast-paced lifestyle of modern people, and also limits its application in modern homes.

With the development of science and technology and the improvement of people's living standards, people have put forward new requirements for the family's lighting system. It not only controls the lighting time and brightness of the lighting source, but also cooperates with the home subsystem to match different applications. The lighting scene, but also to consider the management intelligence and operation simplification and flexibility to adapt to future lighting layout and control changes. An excellent intelligent lighting system can enhance the quality of the home environment and ensure the comfort and health of family life. Therefore, the network switch replaces the traditional switch, and the intelligent lighting system replaces the traditional lighting system, which is an inevitable step in the process of home intelligence.

With the rise of the smart home industry, a new, full of humanized pir sensor automatic light will bring you all this.

Senba Sensing Technology Co.,Ltd., was founded in 2005, with the focus on producing the top quality photoelectric components. If you want to know more details about senba sensor, just feel free to contact us!

Smart Home(2020年01月30日)

senbasensor — 2020-01-22T16:14:00+0900

https://www.senbasensor.com/smart-home.html

Smart home, home appliance solutions

Smart homes have flourished around the world and have become the mainstream of development in the 21st century. Smart home is a product of modern building technology, modern communication technology, modern control technology, modern instrumentation technology and modern computer technology. In recent years, with the rapid development of computer network communication technology and the improvement of people's living environment requirements, the concept of "intelligence" has also been introduced into the construction of housing. "Smart" now brings a lot of delusions to the industry.

Smart homes are based on housing, as long as they are residential, hotels, office buildings, enterprises, factories, schools, etc., are our target markets.

The term smart home seems to be far away from our lives, just a performance in high-tech exhibitions, or a home decoration that the rich show off to show off wealth. In fact, in recent years, smart homes have begun to step into more and more ordinary families. A complete intelligent system generally includes several subsystems such as security, telephone, audio and video, air conditioning, lighting, etc. The price can be accepted by consumers. The owner can choose to install subsystems according to their own needs and preferences to meet their own needs. Various needs at home. With the rapid development of the Internet of Things, pir sensor home automation has entered the ordinary people's homes, and the intelligent life style of film bridges is no longer far away.

Senba Sensing Technology Co.,Ltd., was founded in 2005, with the focus on producing the top quality passive infrared sensor. If you want to know more details, just feel free to contact us!

SMD Passive Infrared Sensor S18-L262B-2(2020年01月29日)

senbasensor — 2020-01-22T16:13:21+0900

https://www.senbasensor.com/products/smd-passive-infrared-seneor-s18-l262b-2.html

Overview
All of Senba products in this Catalog reach ROHS standard. The EU ROHS Directive refers to the European Union's directive 2011/65/EC on the restriction of the use of certain hazardous substances in electrical and electronic equipment. We are the specialist PIR sensor manufacturer for more than 15 years and we have advanced passive infrared technology.

Feature
Custom design is available.
Higher in cost-performance
Long range
Wide angle

Application:
Smart Lighting
Infrared automatic PIR sensor light
Using battery power supply, PIR sensors are easily used in entrance, bathroom, corridor, and other temporary lighting places.
Compared to sound-control lights, pyroelectric sensor has better anti-jamming effect. Only sensitive to human body temperature. To light, when person come, and light off when person leave.

FAQ
1.Can PIR sensor detect animals?
PIR sensors are excellent in human and animal detection. They are mostly used in triggering an intruder alarm and activate household appliances upon the presence of a human.

2.Do PIR sensors work through glass?
No, alarm motion sensors do not work through glass. Most motion sensors use passive infrared (PIR) technology to detect motion. Changes in IR energy are not easily detected through glass. This is why motion sensors will generally not work through windows, which are usually insulated.

Senba Sensing Technology Co.,Ltd., was founded in 2005, with the focus on producing the top quality passive ir motion sensor. If you want to know

Plastic Fresnel Lens S9008 Used in Alarm System(2020年01月28日)

senbasensor — 2020-01-22T16:12:49+0900

https://www.senbasensor.com/products/plastic-fresnel-lens-s9008-used-in-alarm-system.html

Overview

The fresnel lens is a optical element, one side is smooth, another side is by a ring a part of concentric garden composition. Fresnel lens arrays designed for Passive Infrared Sensor. The optical surface increases lens sensitivity for PIR sensor application. All the PIR sensor must work with the Fresnel Lens.

The Fresnel plastic, simply say to be in the lens side have equi-distant tooth tattoo. Through these tooth tattoo, can achieve to specified spectrum light band tong (reflecting or refraction) role. The traditional grinding optical equipment band-pass optical filters are expensive. The Fresnel lens can greatly reduce costs. A typical example is PIR (passive infrared detector). PIR used widely in alarm.

Advantages
Easy to install
High quality
Factory price

Specification
Model Number: S9008
Overall size:22.8mm
Focal length: 15.5mm
Detectable distance: 8m
Viewing angle: 120°
Color: Transparent
Material: HDPE

FAQ
1.What is the payment term?
TT 100% in advance.

2.What is the package.
Plastic bag.

Senba Sensing Technology Co.,Ltd., was founded in 2005, with the focus on producing the top quality intelligent pir sensor. If you want to know more details, just feel free to contact us!

Long Distance 12M Detector Sensor HM412 From Senba Factory(2020年01月27日)

senbasensor — 2020-01-22T16:11:16+0900

https://www.senbasensor.com/products/long-distance-12m-detector-sensor-hm412-from-senba.html

Overview

Long distance PIR sensor allows you to sense motion, almost always used to detect whether a human has moved in or out of the sensors range. They are small, inexpensive, low-power, easy to use and don't wear out. For that reason they are commonly found in appliances and gadgets used in homes or businesses. They are often referred to as PIR, "Passive Infrared", "Pyroelectric", or "IR motion" sensors.

Feature
Higher in cost-performance
Long range
Wide angle

Applications
Wireless Devices/Mobile Equipment
Wireless occupancy sensors (powered by PV cells or battery)
PC and smart phones
Commercial & residential lighting fixtures
Video intercoms
Vending machines
Home automation

FAQ
1.How long do motion sensor lights stay on?
Most people set their motion detection lights so they will stay on for about one to two minutes.

2.Do motion sensors save electricity?
Motion sensing switches do have some “phantom” energy use. According to this study, motion sensor switches use about a watt of energy on standby mode (23 hours a day) and 5 watts on active mode (about an hour a day). This trims a bit off of your overall savings.

LDR Photoresistors(2020年01月26日)

senbasensor — 2020-01-22T16:10:43+0900

https://www.senbasensor.com/products/ldr-photoresistors/

We have photoresistors for sale! Light dependent resistor is made of semi conductor material, and the conductance changs with light. According to this characteristic, LDR photoresistors can be produced with different figures and illuminated areas. LDR photoresistor is widely used in many industries, such as toys, lamps, camera, etc.

The light sensor is a device which converts light energy of various wavelengths from infrared to UV into the electrical energy(or to an electrical signal). This is the reason why they are named as photoelectric devices. They sense the light during this process, and so can be called as 'photo sensors'.

The light sensor is a passive devices that convert this "light energy" whether visible or in the infra-red parts of the spectrum into an electrical signal output. Light sensors are more commonly known as "Photoelectric Devices" or "Photo Sensors" because the convert light energy (photons) into electricity (electrons).

Fresnel Lens(2020年01月25日)

senbasensor — 2020-01-22T16:10:13+0900

https://www.senbasensor.com/products/fresnel-lens/

Fresnel lens, also known as threaded lens, Plastic Fresnel Lens is mostly made of polyolefin material, the surface of the lens is smooth, and the other side is filled with concentric circles from small to large. Its texture is designed to utilize the interference of light and to be based on relative sensitivity and acceptance angle requirements. The quality requirement of the lens is very high. A good lens must have a smooth surface, clear texture. Its thickness varies with the application and normally about 0.6 mm. The lens characteristics are wider surface, thinner and farther detection distance.

There are two functions of Fresnel lens: one is the focusing effect; the other is to divide the detection area into several bright and dark areas, so that the moving object entering the detection area can produce the change of heat release on the PIR in the form of temperature change. It is what we called Infrared signal. We can say that fresnel lens help to strengthen the infrared signal and to make PIR work well.

The Fresnel lens is a convex lens that is equivalent to infrared and visible light in many cases, and the effect is better, but the cost is much lower than that of a conventional convex lens. It is often used in applications where accuracy is not critical, such as slide projectors, thin film magnifiers, infrared detectors, etc.

We have fresnel lens for sale. Normally the lens’ shapes are dome and flat. But these years as the smart home is more and more popular, different lens are needed to match with different controllers. As one of the most professional fresnel lens suppliers in China, Senba can help customers to design and mould the lens they want.

Senba Sensing Technology Co.,Ltd., was founded in 2005, with the focus on producing the top quality passive infrared sensor. If you want to know more details, just feel free to contact us!

Digital PIR Sensor(2020年01月24日)

senbasensor — 2020-01-22T16:09:40+0900

https://www.senbasensor.com/products/digital-pir-sensor/

On a digital smart integrated circuit chip, a pyroelectric passive infrared sensor converts a signal into a 15-bit ADC Digital signal, when the PIR signal exceeds the selected digital threshold, there will be a timed REL level input Out. The OEN enable can be used to automatically control the REL output or through the light sensor. Sensitivity and time. The inter-parameter is set by a resistor, corresponding to the corresponding value, and its voltage is converted to have 7 bits. The digital threshold of the resolution. All signal processing is done on the chip.

Senba Sensing Technology Co.,Ltd., was founded in 2005, with the focus on producing the top quality passive ir motion sensor. We have pir sensor for sale! If you want to buy pir sensor, just contact us!

Analog PIR Sensor(2020年01月23日)

senbasensor — 2020-01-22T16:08:56+0900

https://www.senbasensor.com/products/analog-pir-sensor/

PIR sensor analog, pyroelectric infrared sensor, is normally known as a motion detector. It is a passive sensor based on measuring infrared light radiating from objects within its field of view. The detector itself cannot emit infrared. It is commonly used in burglar alarms and smart lighting applications.

Normally PIR works with a fresnel lens. The human body has a constant body temperature, which is different from the ambient temperature. When a human body moves, this difference is detected by PIR through a Fresnel lens, which outputs an signal.

Senba Sensing Technology Co.,Ltd., was founded in 2005, with the focus on producing the top quality intelligent pir sensor. If you want to know more details, just feel free to contact us!

Analog Output 3- 15V Passive Infrared Sensor D204B(2020年01月22日)

senbasensor — 2020-01-22T16:08:02+0900

https://www.senbasensor.com/products/analog-output-3-15v-passive-infrared-sensor-d204b.html

Overview
D204B come standard with enhanced immunity to EMI (Electro-Magnetic Interference). It widely used in security system.
Senba PIR sensor can detect the wavelengths humans emit which is 8-10um, but Senba PIR can detect 7- 14um. It can be used in security and automation applications. For security applicance, PIR sensor are integrated into the alarm system. There are ceiling type and wall hanging type. For automation applications, PIR sensor d204b can be integrated into the light control system, automatically turn on the light when somebody enter the detect rang, automatically turn off the light when sombody exit the detect range.

Applications
Sensor Switch
The PIR motion sensor adopts high-performance infrared detector. As long as human cross through its detection range, the infrared switch generates an electrical signals.

FAQ
1. Why is PIR sensor called passive?
The sensor is called passive because it doesn't emit light to get measurements. The sensor in PIR is actually split into two parts. The reason for that is to measure motion. ... The sensor is also sensitive enough to even detect IR radiation source movement while the object is already in it's field of view.

2. How far can a motion sensor detect?
D204B can detect up to distances of 8- 10M.