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Model 178A Differential Pressure Transmitter
Model 178A Differential Pressure Transmitter

Model 178A Differential Pressure Transmitter

Overview

The Model 178A Series are low range differential pressure transmitters in HVAC building automation, high accuracy pharmaceutical and health care facilities. The 178A series has a SS304 front panel and an IP65NEMA 4 rated aluminum die casting enclosure to withstand environmental effects. With a convenient push button, the zero calibration can be performed without any additional equipment.


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Key Features of Model 178A Differential Pressure Transmitter:

  • 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 Model 178A Differential 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 4/IP65; Die-cast aluminum

  • Mounting: Front Panel

  • Output signal: current or voltage


Applications of Model 178A Differential Pressure Transmitter:

  • 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


Certificates & Approvals

CE

RoHS




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FAQ
  • Is Wave Soldering Recommended?

    Wave soldering is likely to cause degradation of product performance. Wave soldering is not recommended. Generally we recommend to solder by hand.


  • 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.

  • 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.


  • What Is The Package?

    1. PIR sensor: Graphic Carton-> Carton

    2. LDR: plastic bag -> Graphic Carton -> Carton

    3. Fresnel Lens: plastic bag -> Carton


  • What are the Factors that Affect the Performance of the Product?

    1. When there is dirt on the window, it will affect the detection performance.

     

    2. When the ambient temperature and the human body temperature are close, the detection and sensitivity are significantly reduced, sometimes causing short-term failure. The recommended minimum temperature difference between the ambient temperature and the human body temperature needs to reach at least 4 ° C.

     

    3. When designing the circuit, pay attention to anti-interference measures to prevent false alarms caused by radio frequency interference.