Portable Dew-Point Hygrometer – Michell MDM300 Series Description:

Datasheet User Manual MDM300 Application Software – 64-bit MDM300 Application Software – 32-bit

A high-speed portable dew-point meter designed for compressed air, natural gas, arc-quenching gas in high-voltage switchgear, and many other applications. It enables fast spot checks of dew point or moisture content. The sensor responds rapidly to moisture changes — whether transitioning from dry to wet or wet to dry — without the need to wait between measurements, allowing operators to complete more measurements in a day.

The general purpose MDM300 is suitable for safe area use, while the intrinsically safe MDM300 I.S. has global hazardous area approval from ATEX, UKCA, IECEx, cQPSus and EAC Ex and is able to measure moisture in flammable gases such as natural gas or bio-gas.

The instrument features a durable, ergonomic housing and an easy-to-use interface, ensuring comfortable and practical operation even in harsh industrial environments.

Key Features

Fast, repeatable measurements at low pressure — T95 response to -60 °C (-76 °F) in less than 15 minutes

Supports higher-pressure measurements — up to 350 barg (5076 psig)

Long battery life: up to 48 hours of continuous operation between charges under typical usage conditions

Intuitive application kit for fast, simple connection to the sampling point

Robust, easy to operate and handle — purpose-built for industrial environments

Lightweight: weighs less than 1.5 kg (3.3 lb)

Supplied with a 13-point traceable calibration certificate

Applications

Dew-point measurement in natural gas processing and pipelines

Monitoring of desiccant dryers in compressed air or plastic molding equipment

Moisture measurement in arc-quenching gas for high-voltage switchgear

Moisture measurement in petrochemical refineries

Production and transportation of industrial gases

Medical gas quality

Dew-point measurement in metallurgical applications