Michell DryCheck self-contained dewpoint instrument

The DryCheck from Michell is an accurate, stable dewpoint instrument that includes a built-in simple sampling system. Its compact size allows the instrument to be installed in a number of dewpoint measurement applications, such as compressed air dryers, ozone generators, plastic moulding machines and industrial gas manufacture.

All components are housed in a rugged IP65-rated polycarbonate case which can be wall mounted at a point close to the gas sample. A clear cover protects the display and sample flowmeter.

Gas connection is provided using ‘quick connect’ push fittings, suitable for use with 6 mm OD Teflon tubing. Mains power input, connection to the 4-20 mA analog output and the two user-programmable, voltage-free relay contacts are all easily accessible behind the lower panel.

The instrument uses Michell’s Easidew On-Line to measure dewpoint in the range -100 to +20°C dewpoint, or moisture content in the range 0 to 3000 ppm. It is based on Michell’s Ceramic Moisture Sensor.

The system includes a 0.3 µm particulate filter element, a monolithic sampling block to house the Easidew Transmitter and a valve and flowmeter for setting the sample flow. The filter element is easily replaceable to ensure that the sensor is protected.

All components are rated to 10 barg and the instrument can be configured to measure dewpoint at either system or atmospheric pressure. The DryCheck has a clear 20 mm red LED display which can be programmed to display dewpoint in °C or °F or moisture content in ppm_v. It also provides a 4-20 mA output and 2 off alarm relays.