Cleanroom Control and Environmental Monitoring Systems

Differential Pressure Transmitter

A wall-mounted transmitter that converts low differential pressure into a stable analog or digital signal for cleanroom controllers and monitoring systems.

Field-Selectable Pressure Ranges
Analog and Network Outputs
Stable Zero Reference
Service-Friendly Enclosure

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Product Introduction

The differential pressure transmitter combines a compensated sensing element, signal conditioning and field terminals in a protective enclosure. Selectable ranges let one hardware platform serve room pressure, filter loading and low-pressure duct applications while preserving appropriate resolution. Voltage or current output integrates with standard controllers, and selected versions add a digital network interface or local display. Removable terminals and front-access zero control simplify service without disturbing the wall-mounted tubing arrangement.

Key Features

Multiple selectable ranges adapt the transmitter to rooms, filters or duct pressure.

Stable voltage or current output provides a standard signal for PLC, DDC and EMS inputs.

Front-access zero adjustment supports maintenance without removing pressure tubing.

A protected enclosure separates field wiring from the pneumatic sensing section.

Customer Product Concerns

A transmitter must preserve low-pressure resolution while offering field wiring, range selection and service access suitable for installed systems.

One fixed range cannot cover rooms, filters and ducts without poor resolution.Selectable full-scale ranges match the signal span to each measurement point.

A controller input requires current output but the transmitter provides voltage only.Configurable voltage and current signals support common building-control input types.

Zero checks require disconnecting tubing and rewiring the device.Front-access controls and removable terminals simplify in-place maintenance.

Condensation or dust reaches the circuit compartment through field entries.Separated pneumatic and wiring zones with sealed cable entries protect the electronics.

Typical Applications

Cleanroom differential monitoringHEPA filter differential monitoringDuct static pressureAirflow pickup conversion

Technical Parameters

Typical construction values for a wall-mounted low differential pressure transmitter are shown below.

Core Material	Silicon MEMS element in flame-retardant polymer enclosure with nickel-plated brass tubing ports
Panel Thickness	45-75 mm transmitter depth
Effective Width	90-140 mm housing width
Maximum Length	Up to 180 mm housing height
Steel Facing Thickness	0 mm; impact-resistant polymer enclosure
Core Density	1180-1450 kg/m³ for polymer enclosure components
Thermal Conductivity	0.19-0.35 W/(m·K) for polymer housing material
Surface Finish	Smooth light-gray housing with blue range label and transparent service cover
Joint Type	Dual barbed pressure ports with removable screw terminals and sealed cable entry
Customization	Available based on the intended application and operating environment.

Available Options

Voltage or 4-20 mA outputBidirectional pressure rangesLocal LCDBACnet or Modbus output

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