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https://www.alphainstruments.com/product/model-161-differential-pressure-transmitter/

The low cost pressure transducer(low cost pressure transmitter) Model 161 Series are low range differential pressure transducers and transmitters. Each unit features a stainless steel pressure sensor, a stainless steel back cover and a plastic enclosure, which meets the NEMA 1 requirement. The electrical terminal screws and adjustment holes are concealed beneath a detachable plastic cap. All units are fully protected against short circuiting and incorrect wiring.

The Model 161 Series pressure sensors are available for full scale pressure range from 0 to 0.1″WC till 0 to 100″WC. Both unidirectional and bidirectional pressure ranges are offered.The output of the Model 161 Pressure Transducer is available in two versions: 0 to 5VDC and 0 to 10VDC, where 0VDC is true zero without offset. The output of Model 161 Pressure Transmitters is 4 to 20 mA. All units are temperature compensated. The accuracy can be 0.6%, 0.4% or 0.25% at room temperature.

The patented variable capacitance pressure sensor is constructed by stainless steel and glass, no glue or other organics. That provides excellent performance, corrosion resistance and long-term stability.

Additionally, our unique production setup allows us to accommodate special orders for nonstandard pressure ranges (e.g. -0.5″WC to +3.5″WC).

Key Features of Alpha 161 pressure sensor:
Up to 15 PSI Proof Pressure on all Ranges
Miswiring Full Protection
Unsymmetrical Bidirectional Pressure Ranges
True Zero Output for Voltage Unit
Specification of Alpha 161 pressure transmitter:
Accuracy: ±0.25%, ±0.40% or ±0.60% of span
Differential Pressure Ranges:
Unidirectional: 0.10 in.W.C. to 100.00 in.W.C.
Bidirectional: ±0.10 in.W.C. to ±50.00 in.W.C.
NEMA 1; ABS enclosure
Mounting: surface mount
Output signal: current or voltage
Process Applications of Alpha 161 pressure transducer:
HVAC and VAV Control
Clean Room and Isolation Rooms
Duct Static Pressure Measurement
Draft Control and Fume Hood Control
Furnace Air Flow Control
Power Plant Air Flow Monitor and Control