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RH1 Hygrometer / Dew Point Meter / Relative Humidity Meter With Memory

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Precision hygrometer with datalogger
Measure climate humidity easily, fast and accurately with the RH1 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 RH1 hygrometer automatically as a relative humidity percentage.

The RH1 hygrometer is the perfect instrument to aid humidity control and quality assurance!


  • Very quick balancing
  • 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

Complete Kit

The RH1 is delivered as a complete kit including:
- RH1 Moisture Meter,
- Wooden Case,
- Batteries,
- User Manual

Calibrated on

- relative humidity
- absolute humidity
- dew point
- wood


Measurnig RangeRelative air humidity 0 to 100%
Resolution0.1% RH
Relative Humidity Calibration0 to 90% ± 1.5%RH (at 25°C)
Temperature Range-10 to 60°C (14 to 140°F)
Temperature Resolution0.1°C
Temperature Unitscan be set to °C and °F
Temperature Measurment Accuracy±0.4°C (at 25°C) Pt 1000 DIN B
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)
Date LoggerAutomatic data log for 10.000 logs with measuring point report
Optionally AvailablePC-interface, software and printer
Warranty2 years


Buy Now

Item Description Price
Hygrometer / Dew Point Meter / Relative Humidity Meter With Memory
Hygrometer / Dew Point Meter / Relative Humidity Meter With Memory & USB Output
Bluetooth data communication module
Portable thermoprinter on batteries - for use with RH5-USB ONLY.
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.