Cleanroom Testing and Validation Instruments

Dew Point Meter

A portable dew point meter with a stainless process probe and controlled sampling interface for checking moisture in compressed air and other non-corrosive gases.

Portable dry-gas moisture checks.
316L process probe and sampling cell.
Live stabilization trend display.

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Product Introduction

This field meter combines a battery-powered graphical indicator with a cabled stainless steel dew point probe and a compact flow-through sampling cell. The sensor can be installed directly in a compatible process connection or exposed to a regulated slipstream through the sampling cell, allowing the user to keep gas pressure, flow and ambient ingress under control. Automatic sensor conditioning supports recovery after exposure to wetter gas, while the indicator stores readings and displays trends during stabilization.

Key Features

Wide dew point coverage supports both dry compressed-gas checks and general environmental measurements.

Stainless wetted parts and a sintered filter protect the sensor in clean non-corrosive gas streams.

Flow-through sampling cell provides a defined inlet and outlet for pressurized gas measurements.

Pressure compensation converts the measured condition to a selected reference pressure when required.

Automatic sensor conditioning shortens recovery after a high-moisture exposure.

Handheld trend display and internal logging help the operator judge when a reading has stabilized.

Customer Product Concerns

Dry-gas dew point measurements are sensitive to ambient leakage, sample pressure, tubing material and stabilization time, so the sampling path must protect the reading as carefully as the sensor itself.

Ambient moisture can enter a dry gas sample and cause a falsely high reading.A sealed flow-through cell and low-permeability tubing isolate the sensor from room air during sampling.

A sensor exposed to wet gas may take too long to return to a low dew point.Automatic sensor conditioning accelerates recovery before the next dry-gas measurement.

Process pressure can make a dew point result difficult to compare with atmospheric values.Selectable pressure compensation reports the measured result at the required reference condition.

Operators may record a value before the sample and sensor have stabilized.The graphical trend and stored time series make the approach to equilibrium visible at the handheld display.

Typical Applications

Compressed-air dryer verificationClean compressed-gas utility testingNitrogen distribution moisture checksInstrument-air maintenanceEnvironmental chamber dew point measurement

Technical Parameters

Representative portable dew point meter construction is listed below; probe range, sample fittings, flow control and transport accessories can be selected for the gas system.

Core Material	ABS/PC handheld enclosure, 316L stainless steel wetted probe and sampling cell, measurement electronics and humidity sensor
Panel Thickness	Typically 2.0-3.0 mm for the molded handheld enclosure wall
Effective Width	Approximately 80 mm across the handheld indicator
Maximum Length	Approximately 200 mm for the indicator and 96 mm for the separate sensing probe
Steel Facing Thickness	Typically 1.0-1.5 mm for stainless probe and sampling-cell walls
Core Density	Approximately 1050-1200 kg/m³ for the ABS/PC enclosure blend
Thermal Conductivity	Approximately 0.19-0.22 W/(m·K) for the ABS/PC enclosure blend
Surface Finish	Dark navy-gray textured polymer enclosure, clear display window, satin 316L probe and sampling cell, blue polyurethane tubing
Joint Type	Threaded G1/2 probe connection, keyed electrical cable connector and twin 1/4-inch sample-gas tube fittings
Customization	Available based on the intended application and operating environment.

Available Options

Standard-range dew point probeLow-dew-point probePressurized gas sampling cellFlow-control valveCooling and venting coilProtective transport case

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