Dew Point Meter The removal of moisture and condensate in compressed air systems may be achieved with different equipment for example: aftercoolers, separators refrigeration and adsorption air dryers, filters, drain traps, etc. However, most of the time it is difficult to know what is the real quality of the treated air at the dew point achieved. The most common indicators are: Analog or digital thermometer for refrigeration air dryers Electronic or color-change indicators for adsorption dryers The accuracy of these devices, although acceptable for some industrial applications, is not totally reliable, or suitable for pharmaceutical and laboratory applications, precision mechanical processing, instrumentation, etc. where air pollution can cause damage with consequently high repair & maintenance costs. The Motivair DPM200 &DPM297 Dew Point Meters are multi-function digital instruments, able to measure simultaneously: Dew point of the compressed air Working Pressure Air temperature under test Battery condition (DPM 297 only) DPM200 is the portable version supplied with rechargeable batteries and back-lit LCD, which displays the test results. Battery hold-up time is 8 hours. This model is supplied complete with molded carrying case and battery charger. DPM297 has been developed for permanent or panel mounting installation. It is fitted with an adjustable dew point alarm contact, and it is typically utilized for either: a) permanent installation for dew point monitoring & alarm, or b) installation on an adsorption dryer to reduce the purge-air consumption. This version is featured, as an option, on Motivair MHL regenerative dryers. How it works The DPM utilizes a sensor made of a thin, polymer film. One of the most important features of this technology is the high speed of the sensor in measuring extremely small variations. The result is a highly accurate, real-time dew point measurement. The risk of decay in accuracy, reading after reading, is avoided with an automatic regeneration process of the probe. By automatically pre-heating the sensor for each operation, any possibility of moisture migration to the probe is eliminated. Meter Display One back-lit LCD, capable of displaying 32 characters on two rows One (right) button (I/O) which turns the unit on & off. One (left) button (Multifunction), to select the requested function (dew point, temperature, pressure, battery).