HygroMet4 - HM4
The HygroMet4 is suitable for use wherever high humidity prevails for short or long periods. In such environments condensation could occur on conventional probes, thereby delivering incorrect values. This is particularly the case in meteorology, in cheese cellars, tunnels and caves.
The HygroMet4 is equipped with an automatic sensor heater. It heats the sensor above ambient temperature by 0.1...10 °C depending on the settings. Heating of the sensor prevents the formation of condensation.
The following heating cycles can be selected and are freely programmable:
- Permanent heating
The sensor is constantly heated.
The heater can be switched on hourly, daily, weekly or monthly at a definable point in time. The heating period can be set at will.
- Depending on current measured values
The sensor heater can be programmed such that it is only switched on if a certain humidity or temperature value is not reached or is exceeded.
The programmable cleaning function heats the sensor to up to 150 °C. The cleaning function can be switched on daily, weekly or monthly at a definable point in time. The cleaning period can also be set.
- Allows simultaneous measurement and heating
- Measures relative humidity and temperature
- Calculates off all psychrometric parameters
- Freely programmable RoHumiHeat sensor heating
- Adjustable RoHumiClean sensor cleaning
- SMD Thermo sensor element
- Outstanding accuracy and repeatability
- Integrated real-time clock
- Freely scalable analog output signals
- RS-485 interface
|Probe type||Meteorological probe|
|Operating range||-40…85 °C / 0…100 %rh|
|Accuracy at 23 ±5 °C||Heated: ±1.5 %rh|
|Power supply / Power consumption||15...24 VDC / 5...24 VDC (only 0...1 V) With heater: <55 mA @ VDD = 5 VDC / <30 mA @ VDD = 24 VDC Without heater: <35 mA @ VDD = 5 VDC / <20 mA @ VDD = 24 VDC|
|Long-term stability||<1 %rh / year|
|Heating mode||Permanent heating / Interval / Depending on current measured value|
|Heating period||1...255 min.|
|Heating element||SMD Thermo|
|Humidity sensor||SMD Thermo|
|Temperature sensor||PT100 1/3 DIN Class B|
|Response time t 63||<25 sec.|
|Allowed wind speed||20 m/s, with filter|
|IP protection rating||IP65|