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Industrial Dew Point and Hygrometry

Chilled Mirror Hygrometer Information The measurement of the water vapor content of a gas by the dew-point technique involves chilling a surface, usually a metallic mirror, to the temperature at which water on the mirror surface is in equilibrium with the water vapor pressure in the gas sample above the surface. At this temperature, the mass of water on the surface is neither increasing (too cold a surface) nor decreasing (too warm a surface).

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Chilled Mirror Hygrometers Sampling & Accuracy The absolute accuracy of the condensation-type (chilled mirror) hygrometer is exceeded only by the gravimetric train, an elaborate absorption system maintained as the primary standard for humidity measurements. Over the mid-range of dew point temperatures (±40°C), the uncertainties of chilled mirror hygrometer measurements are in the order of one part in 100.

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Dew Point Hygrometers

Industrial Dew Point Hygrometer  The Model DPH-2020 Industrial Dew Point Hygrometer is a two-stage chilled mirror hygrometer for industrial process or lab applications. Includes NEMA protection of electronics. Dual-line digital display. Pressure rated to 30 PSI. DSP technology provides auto-correction for mirror contamination and "mirror clean" indication. Accuracy = ± 0.1oC dew point over ± 50oC; max depression 65oC. Zero hysteresis. Analog 4-20mA analog output and digital RS-232 port with graphical PC/Mac real time display software. Includes serial cable. Forced-air cooling with air filtering. Programmable output limit relays for process control automation. NIST traceable. Requires 110/220Vac. Optional microscope available.

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Industrial Dew Point Hygrometer with Temperature and Pressure Channels The Model DPH-2020TP Industrial Dew Point Hygrometer with Temperature and Pressure Channels is a  two-stage chilled mirror hygrometer with ambient temperature and pressure sensors for industrial or lab applications. Includes NEMA protection of electronics. Dual-line digital display. Pressure rated to 30 PSI. DSP technology provides auto-correction for mirror contamination and "mirror clean" indication. Accuracy = ±0.1oC dewpoint over ±50oC; max depression 65oC. Zero hysteresis. Analog 4-20mA analog output and digital RS-232 port with graphical PC/Mac real time display software. Includes serial cable. Forced-air cooling with air filtering. Programmable output limit relays for process control automation. NIST traceable. Requires 110/220Vac.

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Industrial Dew Point Hygrometer System The Model DPH-2020S Industrial Dew Point Hygrometer System is a two-stage chilled mirror hygrometer with ambient temperature and pressure sensors and integral sampling system. Includes mirror microscope, flow gauge, air pump, filter and EIA Rack/wall mountable chassis, for industrial or lab applications. Includes NEMA protection of electronics. Dual line digital display. Pressure rated to 30 PSI. DSP technology provides auto-correction for mirror contamination and "mirror clean" indication. Accuracy = ±0.1oC dew point over ±50oC; max depression 65oC. Zero hysteresis. Analog 4-20mA analog output and digital RS-232 port with graphical PC/Mac real time display software. Includes serial cable. Forced-air cooling with air filtering. Programmable output limit relays for process control automation. NIST traceable. Requires 110/220Vac. Dual channel version available.

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Dew Point Transmitter The Model DPT-2011 Dew Point Transmitter is a single-stage chilled mirror dew point sensor with digital display. DSP technology provides auto-correction for mirror contamination and LED "mirror clean" indication. Accuracy = ±0.26oC dew point over ±50oC; max depression 45oC. Analog 4-20mA analog output and digital RS-232 port with graphical PC/Mac real time display software. Includes mounting bracket and serial cable. Pressurized to 30 PSI. NIST traceable. Requires 11-14VDC.

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Dew Point Transmitter System The Model DPT-2011S Dew Point Transmitter System is a complete, turn-key single stage chilled mirror dew point system with integral sampling components. Includes pump, pre-filter and airflow gauge, with 19-inch chassis for EIA rack or wall mounting. Single stage chilled mirror dew point sensor with digital display. Sensor is pressure rated to 30 PSI. DSP technology provides auto-correction for mirror contamination and LED "mirror clean" indication. Accuracy = ±0.26oC dew point over ±50oC; max depression 45oC. Analog 4-20mA analog output and digital RS-232 port with graphical PC/Mac real time display software. Includes mounting bracket and serial cable. NIST traceable. Requires 110/220Vac, 50-60Hz. A dual-channel version is available.

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Chilled Mirror Hygrometer  The Model OEM-2017 Chilled Mirror Hygrometer is an analog single-stage chilled mirror sensor pressure rated to 30 PSI designed for on-line process sampling, OEM applications. Accuracy = ±0.16°C dew point over –40°C/+50°C; max depression 45°C. Includes analog controller PCB with Class A DIN, 100 ohm PRT resistance output and connecting cable. NIST traceable. Requires 12Vdc. Lot pricing available.

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