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RH2-AW-CHAMBER Relative Humidity Meter with External AW-CHAMBER Activity Water, Complete Kit

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Precision hygrometer with datalogger and external probe with 2 meter connecting cable Measure climate humidity easily, fast and accurately with the RH2 relative moisture meter, optionally available with a PC-interface, software and printer.

How does it work? Relative humidity is the amount of water vapor that exists in a gaseous mixture of air and water and is normally expressed as a percentage.

The relative humidity of an air-water vapor mixture can be estimated if both the measurement temperature and the dew point temperature of the mixture are known. This approach to measuring humidity requires an equation expressing the saturation vapor pressure as a function of temperature, the result of this equation is displayed by the RH2 hygrometer automatically as a relative humidity percentage.

The RH2 hygrometer is the perfect instrument to air humidity control and quality assurance!


  • Measure relative humidity, absolute humidity, dew point, equilibrium moisture content and AW value
  • Easy data storage for printing or analysis on PC
  • Durable humidity- and temperature sensors
  • Menu language in English, German, French, Italian, Spanish and Russian
  • Hold function allows saving of results manually
  • Fast conditioning

External Sensors

Two external sensors are available for the RH2, a plastic external sensor and a metal stabbing probe.

External plastic moisture and temperature sensor for RH2

External metal stabbing probe for RH2

Complete Kit

The RH2 is delivered as a complete kit including:
- RH2 Moisture Meter,
- Moisture & Temparature Probe,
- Wooden Case,
- Batteries,
- User Manual
- External sensor or stabbing probe (depending on your selection)

Calibrated On

- Relative humidity
- Absolute humidity
- Dew point
- Wood


Measurnig RangeRelative air humidity 0 to 100%
Relative Humidity Calibration±2.5% (0 to 90%) at 25°C
Temperature Range-20 to 120°C
Temperature Resolution0.1°C
Temperature Measurment Accuracy±0.5°C (at 25°C) Pt 1000 DIN B
Temperature Units°C or °F
Dew Point Temperature Range-55 to 60°C (-67 to 140°F)
Dew Point Temperature Resolution0.1°C
Absolute Air Humidity Range0 to 130 g/m³
Absolute Air Humidity Resolution0.1 g/m³
Equilibrium Moisture Content Range2 to 30% Ugl
Equilibrium Moisture Content Resolution0.1%
Equilibrium Moisture Content Calibration5 to 15%
Equilibrium Moisture Content Accuracy±0.5% (at 25°C)
Data LoggerAutomatic data log for 10,000 logs with measuring point report
Data Output (RH2-USB only)USB interface (supplied with data transfer cable & software)
Power4x 1.5 Volt AA batteries
Warranty2 years


Buy Now

Item Description Price
Relative Humidity Meter with External AW-CHAMBER Activity Water, Complete Kit
RH2 Relative Humidity Moisture Meter Gauge Body with Rubber Sleeve - Sensors Sold Separately
RH2-USB Relative Humidity Moisture Meter Gauge Body with Rubber Sleeve - Sensors Sold Separately
Air Humidity and Temperature Sensor with 2 meter connecting cable
Replacement Moisture and Temperature Sensor
Replacement Stabbing Sensor for Humimeter RH2
Portable thermoprinter on batteries - for use with RH5-USB ONLY.
Paper web adapter for Humimeter RH2 and LF-Serie
Wall Mount assembled on RH1
Stainless steel sinter sensor cap
Calibration equipment for instrument for Probe
Certified calibration ampoules - set of 5.2x35% r.h., 1x50%r.h., 2x80%r.h.
Certified calibration ampoules - set of 5. 50%r.h.
In stock
1 Week Lead Time (Estimated)
2-3 Week Lead Time (Estimated)
Lead Time Varies, Please contact us for availability.