|Temperature||0 to 50°C|
|Relative humidity||10 to 95% r.h.|
|Absolute humidity||0.5 to 74.4g/m³|
|Dew point temperature||-27.3 to 47.9°C|
|Response time||approx. 10 s|
|Minimum, Maximum values and Peak Hold||yes|
|External temperature sensor||1.1m cable|
|Operating conditions||-20 to 50°C / 0 to 100% r.h.|
|Dimensions (device)||165 x 80 x 33mm|
|Dimensions (sensor)||150 x 30mm (ambient temperature / humidity)|
50 x 30mm (surface temperature)
Dew point / Dew point temperature
Dew point temperature is defined as the actual content of water vapour in the air found at the maximum level (100% of relative humidity of air). Dew point is therefore an independent measure from the actual temperature. One way of measuring dew point is freezing a metal pipe until moisture forms on its surface. When water vapour appears, the metal has reached dew point temperature. The most common method to measure dew point is to use a wet thermometer together with a dry thermometer. The wet thermometer shows dew point and with the ambient temperature, relative humidity can be determined. This device does this calculation automatically.
elative humidity / Absolute humidity in % or g/m³
The expression "relative humidity" represents the degree of relative saturation of air, i.e. which percentage of the maximum saturation of air moisture is given at this specific temperature. The scientific definition of "relative air humidity" refers to the relationship of the partial pressure of water vapour with respect to the pressure of water saturation. The word air doesn't appear in the definition as relative air humidity is totally independent from the existing quantity of nitrogen or oxygen. The saturation vapour pressure of water vapour remains the same regardless of it being measured in a vacuum or high air pressure. To show if the air is dry or humid, relative air humidity is far more significant than absolute humidity in grammes of water per kilogram of air. In certain volumes, air humidity in absolute terms can be shown in g/m³.
ISO laboratory calibration certificate
For companies that wish to incorporate the device into their array of internal quality control tools or for annual recalibrations (if not using the calibration kit). The ISO certificate includes a calibration and a document containing all the readings taken.
Replacement combined sensor
The combined sensor comes with the device (it measures ambient temperature and relative humidity) and can be recalibrated numerous times. After some years of use, however, it can be replaced with a substitute sensor.
Replacement surface temperature sensor
If the surface temperature sensor that comes with the the humidity detector eventually fails, a replacement can be ordered when required.