Vaisala Instruments Automation Components APT Instruments

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.

Fixed InstallationsPortablesProbes & OEM Modules

Fixed Installations

HMT330 Series HUMICAP® Humidity and Temperature Transmitter for demanding applications

HMT360 Series Intrinsically Safe Humidity Transmitters Trasnmitters for use in potentially explosive atmospheres. The whole transmitter can be installed directly into an explosive area, even into areas classified as having a constant risk of explosion.
HMW61 and HMW71 Humidity Transmitters Wall-mounted transmitters for dusty and humid air-conditioning applications. The transmitters are protected against dust and sprayed water, meeting IP65 requirements.

HMD/W60 and HMD/W70 Humidity Transmitters Duct-mounted humidity and temperature transmitters for air conditioning applications. IP65 protected.

HMW60/70 Humidity Transmitters Wall-mounted humidity and temperature transmitters for air conditioning applications. They are the ideal choice for demanding energy management applications. IP65 protected.

HMD/W40 and HMD/W50 Humidity Transmitters Duct-mounted transmitters for air conditioning systems; they combine excellent stability with easy installation and reliable operation. IP65 protected.

HMW40/50 Humidity Transmitters Wall-mounted transmitters for air conditioning systems; they combine excellent stability with easy installation and reliable operation.

ACI A/RH

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

Room Wall Mounted RH Sensor 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.

Portables

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 Humidity Meter HM34 is a light-weight pocket-sized meter which provides fast and convenient spot-checks of relative humidity and temperature.
HMI41 Hand-held Meters The hand-held 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.
APT RH 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 Pen - Modular meter and probe enables delivers greater accuracy of RH readings with flexible positioning of the probe. RS-232 Output.
RH100 RH/Temp Transmitter - Low-cost Vdc-powered transmitter provides continuous analog (Vdc) output proportional to RH and Temp of the environment. Ideal for integration into control system.

Probes and OEM Modules

HMM210 Series Humidity Modules The modules are optimized for harsh environments with both high humidities and a wide temperature range. The humidity measurement is fully temperature compensated and the sensor head is vapor proof.
HUMITTER® Humidity Probe The HUMITTER® has been developed to meet the demand for a low cost transmitter suitable for volume applications or integration into other manufacturers' equipment. IP65 protected.
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

 


 
 
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