MCU Simplifies Multi-Channel Moisture Measurements

Michell Instruments has launched a multi-channel control unit (MCU) designed to simplify multi-channel moisture measurements. The Promet IS process moisture-in-gas analyser is now available in a multichannel format, with the MCU, which enables the control of up to four pressure-compensated moisture measurement channels within a single 19in sub-rack unit. Measurements of moisture in process gases and liquids can be easily combined in a single analyser system with the MCU as the Promet IS channels for moisture-in-gas can be combined together with a sister product for moisture-in-liquid measurement - the Liquidew IS.

Each channel of the MCU functions independently of the others so that maintenance can be carried out on one channel while the others continue to operate as normal - this is ideal in situations where redundancy is required for safety reasons. The MCU keeps the cost per channel to a minimum and is also simple to operate, according to Michell Instruments. Its bright alphanumeric LED display, with optional live pressure compensation, provides unit conversions from dew point to a wide range of alternative moisture content units to allow the user complete flexibility to select their preferred unit of measurement.

The Michell MCU contains all the IS components necessary to operate the Promet IS and Liquidew IS in a hazardous area and is easy to install into existing sampling and distribution systems with minimal wiring. To allow for further expansion, customers can order blank channels.

The front-panel interface enables the user to scroll through the set-up menus to easily configure the analyser to their own requirements. Four user-adjustable alarm points and two analogue 4-20mA outputs are provided as well as a digital RS485 RTU for connection to external devices. Based on Michell's ceramic moisture sensor, the Promet IS can measure dew points as low as -100C, and is calibrated and traceable to NPL and NIST.

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