DryCheck
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Dew-Point Transmitters Self-Contained Dew-Point Instrument A simple and efficient, self-contained dew-point hygrometer, with filtration and flow control, for measurement of dew point or moisture content. Highlights • Integrated instrument and sampling system Applications • Compressed air dryers • Simple installation • Plastic moulding • Wide measurement range • Ozone generators • Dew point or moisture content • Medical gases • Analog output, display and dual alarms

Dew-Point Transmitters DryCheck Self-Contained Dew-Point Instrument Background Integral Sampling System The DryCheck system was designed by Michell Instruments in response to demands from customers for an economic instrument package with good accuracy and stability, inclusive of a comprehensive sampling system, which could be easily installed for use in a number of dew-point measurement applications. The DryCheck sampling 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....

Dew-Point Transmitters Technology Ceramic Metal-Oxide Moisture Sensor Permeable Gold film The DryCheck uses Impedance technology, based on Michell’s ceramic metal-oxide moisture sensor. The operation of this sensor depends on the dielectric property of water molecules absorbing onto an active porous insulating layer sandwiched between two layers of conductive material deposited on a ceramic substrate. Hygroscopic Mono-layer Base Electrode Ceramic Substrate Moisture Molecules Water has a very high dielectric compared to the dielectric of the active layer and the background of the carrier gas...

Dew-Point Transmitters Technical Specifications Measurement Range -100...+20 °C (-148...+68 °F) dew point 3000 ppmv (ppmv output or non-standard dew point range must be specified at time of order) Operating Temperature Storage Temperature 4...20 mA maximum load resistance 500 Ω 2 volt free contacts 3 A @ 240 V User Interface Front panel configuration of alarm points Power Supply Ingress Protection Mains Cable 1 MPa (10 barg/145 psig) max (high pressure option available) Sample Flow Rate Quick Connect fittings for 6 mm OD Teflon pipe For full specification, please see the Easidew Transmitter...