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Sensors & Transmitters
   Data Acquisition
   pH and ORP
   Relative Humidity / Dewpoint
     RH Fixed Installation
     RH Portable Instruments
     Probes and OEM Modules
   Differential Pressure
   Carbon Dioxide
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Tel: 1-925-706-7433

Humidity,dewpoint, temperature fore HVAC and Industrial applications
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.


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 (OBSOLETE - replace with HMT120/130) Humidity and Temperature transmitters for demanding HVAC applications
HMT120 / HMT130 Humidity and Temperature Transmitters optimized for Cleanrooms installations and demanding HVAC applications
HMD60 / HMD70 Duct-mounted humidity and temperature transmitters for air conditioning applications, IP65 protected.
HMW60 / HMW70 (OBSOLETE - replace with HMW90) Wall-mounted humidity and temperature transmitters for air conditioning applications, IP65 protected
HMD40 / HMD50 (OBSOLETE - replace with HMD82/83) Duct-mounted transmitters for air conditioning systems
HMW40 / HMW50 (OBSOLETE - replace with HMW82/83) Wall-mounted transmitters for air conditioning systems
HMDW82 / 83 Duct or Wall mounted RH + T Transmitters designed for standard HVAC applications
HMW90 Wall mounted humidity and temperature transmitter for high performance, demanding HVAC applications
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
HMD60&70, HMW60&70
HMT 360 HMW61 and HMW71
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.
Room Wall Mounted RH Sensor

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.
Can be used in many industrial spot-checking applications as well as a one-point calibration check for fixed dewpoint transmitters.
HM34 (OBSOLETE - replace with HM40) Light-weight pocket-sized humidity meter
HM40 Hand-held Humidity and Temperature Meter ia compact, robust and affordable. It is an ideal spotchecking tool that is easy to use and provides a reliable measurement. The HM40 can be used for various portablemeasurement applications.
HMI41 Relative Humidity and Temperature Indicator is versatile and easy to use. Five different probes provides 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 RH Instruments
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

OEM Instruments and Modules and Probes

OEM Modules
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
HUMITTER® Developed to meet the demand for a low cost transmitter suitable for volume applications or integration into other manufacturers' equipment.

Relative Humidity / Dewpoint

  HM40 Portable Humidity and Temperature Meter with standard probe (HMP113 probe)*
Code: VIHM41
Price: $543.00
Quantity in Basket: none

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