Humidity, dewpoint and temperature measurement instruments
Relative humidity (RH) is defined as the ratio of the water vapor pressure or water vapor content to the saturation vapor pressure or the maximum vapor content at the temperature of the air or gas. The saturation vapor pressure in the air varies with air temperature, the higher the temperature, the more water vapor it can hold. When saturated the relative humidity in the air is 100 %RH.
Humidity and Dewpoint Transmitters for Fixed Installations
	Vaisala Humidity HMT330 HUMICAP® Humidity and Temperature Transmitter for demanding industrial applications HMT360 Intrinsically Safe Humidity Transmitters Trasnmitters for use in potentially explosive atmospheres HMT100 Humidity and Temperature transmitters for demanding HVAC applications. 2-wire loop powered or 3-wire voltage outputs, interchangeable probe HMD60 / HMD70 Duct-mounted humidity and temperature transmitters for air conditioning applications, IP65 protected. HMW60 / HMW70 Wall-mounted humidity and temperature transmitters for air conditioning applications, IP65 protected HMD40 / HMD50 Duct-mounted transmitters for air conditioning systems; they combine excellent stability with easy installation and reliable operation. IP65 protected. HMW40 / HMW50 Wall-mounted transmitters for air conditioning systems; they combine excellent stability with easy installation and reliable operation. HMT300TMK HUMICAP® Turbine Mounting Kit, heated probe enables accurate humidity readings in water vapor injection applications Vaisala Dewpoint DMT340 Designed for industrial low dewpoint measurements below 10% (RH). Ideal for dry air monitoring and plastic dryers. Optional data logging and (W)LAN interface. DMT346 Constructed for humidity measurement in industrial drying applications with particularly high temperatures. DMW19 Designed for wall mount dewpoint measurement applications. Ideal for HVAC system integrations
	Automation Components ACI A/RH Relative Humidity transmitters, convert a resistance change to a linear 4 to 20 mA, 0 to 5 VDC, or 0 to 10 VDC output. The current signal may be transmitted over long distances on twisted-pair wire and will not be affected by the lead wire resistance or electrical noise. 1%, 2%, 3%, and 5% Accuracies A/RH-TEMP Relative Humidity transmitters, convert a resistance to a linear 4 to 20 mA, 0 to 5 VDC, or 0 to 10 VDC output. The current signal may be transmitted over long distances on unshielded twisted-pair wire and will not be affected by the lead wire resistance or electrical noise.
Portable Hand-Held Instruments and Calibrators
	Vaisala Instruments HM70 Hand-held Humidity and Temperature Rugged and reliable high-accuracy meter for demanding applications. Ideal for on-site checking and transmitter calibrations. Accredited calibration available. DM70 Hand-held Dewpoint Meter The meter measures dewpoint accurately in a wide measurement range. It can be used in many industrial spot-checking applications as well as a one-point calibration check for fixed dewpoint transmitters. HM34 Light-weight pocket-sized humidity meter which provides fast and convenient spot-checks of relative humidity and temperature HMI41 Relative Humidity and Temperature Indicator is versatile and easy to use. With a choice of five different probes it gives you flexibility to work in a variety of applications. HMK15 Humidity Calibrator enables easy and reliable on-site calibration of humidity instruments. Based on saturated salt solutions.
	APT Instruments RH1000 RH Pen Small, pen-sized thermo-hygrometer fits easily into pocket or tool box. Great little tool for indication of room temperature and relative humidity RH1210 RH Modular meter and probe enables delivers greater accuracy of RH readings with flexible positioning of the probe. RS-232 Output RH100 RH Low-cost Vdc-powered transmitter provides continuous analog output proportional to RH and Temp of the environment. Ideal for integration into control system
OEM Instruments and Modules and Probes
	Vaisala Instruments DMT242 Designed for OEM system integrations. Ideal for dryers and dry air systems DMT152 Designed for measuring low dewpoint in OEM applications, even down to -80°C DMT142 Miniature dewpoint measurement instrument for industrial OEM applications like air dryers or plastic dryers HMM210 Modules optimized for harsh environments with both high humidities and a wide temperature range. HMP45A/D Humidity Probe The humidity and temperature probes for OEM's and single users are designed for use with a wide range of instrumentation. HM44 structural humidity measurement set HMI38 humidity data processor HUMITTER® Developed to meet the demand for a low cost transmitter suitable for volume applications or integration into other manufacturers' equipment.