Cleanroom Testing and Validation Instruments

Differential Pressure Calibrator

A portable differential pressure calibrator with fine pneumatic generation, dual pressure ports and electrical loop measurement for cleanroom transmitters and gauges.

Controlled low-pressure generation and measurement.
Simultaneous pressure and transmitter-loop display.
Fine adjustment for stable calibration points.

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Product Introduction

This field calibrator combines a precision low-pressure reference, a fine-adjust pneumatic source and electrical measurement in one rugged handheld package. Technicians can apply controlled positive or negative differential pressure to room transmitters, switches and gauges while comparing the device output with the reference value. Step, hold and zero functions streamline multipoint verification.

Key Features

Integrated hand pump generates controlled low positive or negative pressure.

Fine-adjust valve enables stable approach to each calibration point.

Dual pressure ports connect high and low sides of differential devices.

Simultaneous pressure and mA display supports transmitter verification.

Zero, hold and step functions simplify repeatable multipoint work.

Rugged field enclosure protects the reference sensor and controls.

Customer Product Concerns

Cleanroom pressure instruments operate at small setpoints, so calibration equipment must generate pressure smoothly and compare pneumatic input with electrical output in a controlled sequence.

Low-pressure setpoints are difficult to reach without overshoot.A coarse hand pump and fine-adjust control allow gradual, stable approach to each point.

Separate reference, pump and loop meter create a complex field setup.One enclosure combines pressure generation, reference indication and electrical measurement.

Incorrect high/low connections reverse transmitter response.Color-coded dual ports make pressure polarity clear before the test begins.

Manual multipoint sequences can be inconsistent between technicians.Step, hold and zero functions standardize the applied-point workflow.

Typical Applications

Cleanroom differential-pressure transmitter calibrationRoom pressure gauge verificationFilter pressure-switch testingAirflow sensor loop checksHVAC commissioning instrumentation

Technical Parameters

Representative portable calibrator construction is listed below; reference range, pneumatic fittings and electrical functions can be selected for the installed instrument population.

Core Material	Precision pressure sensor, brass pneumatic manifold, elastomer seals and impact-resistant polymer housing
Panel Thickness	Typically 2.5-4.0 mm for the reinforced calibrator enclosure
Effective Width	Approximately 100-135 mm across the handheld body
Maximum Length	Approximately 220-280 mm including pump and port protection
Steel Facing Thickness	Typically 0.8-1.5 mm for stainless internal manifold and pump components
Core Density	Approximately 7800-8000 kg/m³ for stainless pneumatic components
Thermal Conductivity	Approximately 14-17 W/(m·K) for stainless pneumatic components
Surface Finish	Graphite overmolded housing with blue/red pneumatic identifiers and safety-yellow control accents
Joint Type	Threaded dual pressure ports with push-fit tubing adapters and shrouded electrical terminals
Customization	Available based on the intended application and operating environment.

Available Options

Low differential-pressure rangesExternal pressure modulesmA loop-power functionPneumatic tubing and adapter kitHand or electric pressure generationProtective field case

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