The model 178A Series pressure monitors 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

Alpha instruments Inc is a professional pressure transmitter supplier, we provide static air pressure sensor, surface mount pressure sensor, low differential pressure transmitter and etc. Want to know more? Please contact us.