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https://www.alphainstruments.com/product/model-178a-differential-pressure-transmitter/

The model 178A Series surface mount pressure transducer are low-range differential pressure transmitters. Each unit features a push-activated ZERO function and an associated LCD display. With a convenient push button, the zero calibration can be performed without any additional equipment. It significantly reduces time and cost for users.
The 178A series pressure differential monitor has a SS304 front panel and an IP65/NEMA 4 rated aluminum die casting enclosure to withstand environmental effects. The pressure ranges from 0.1″WC to 100″WC, unidirectional or bidirectional. The output is 2-wire 4 to 20mA, fully protected against short circuiting and incorrect wiring.
All units are temperature compensated. 0.6%, 0.4% and 0.25% accuracies are available. The patented stainless steel diaphragm sensor provides good corrosion resistance,excellent repeatability and long term stability.
Key Features of Alpha 178A pressure monitor:
SS304 Front Panel Mounting
3-1/2 Digit LCD Display
Push Button Zero Calibration
Up to 15 PSI Proof Pressure on all Ranges
Miswiring Full Protection
Rugged Aluminum Housing Rated NEMA 4/IP65
Specification of Alpha 178A pressure differential monitor:
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 4/IP65; Die-cast aluminum
Mounting: surface mount
Output signal: current or voltage
Process Applications of Alpha 178A pressure sensor:
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