In industrial processes or in research-based business, the Testo 6681 temperature and humidity transmitter is ideal wherever critical climatic values need to be maintained.
In industrial processes or in research-based business, the Testo 6681 temperature and humidity transmitter is ideal wherever critical climatic values need to be maintained.
In industrial processes or in research-based business, the testo 6681 temperature and humidity transmitter is ideal wherever critical climatic values need to be maintained. The climate transmitter boasts a high-precision humidity sensor with long-term stability (optionally available), which enables it to achieve maximum precision: up to ±(1.0 + 0.007 reading).
Features
Applications
Humidity Selectable units | Dependent on probe, available are: relative humidity %RH; normed atm. dewpoint in °CtdA (°Ftd); dewpoint in °Ctd (°Ftd); absolute humidity in g/m³ (gr/ft³); degree of humidity in g/kg (gr/lb); enthalpy in kj/kg (BTU/ lb); psychrometer temperature in °Ctw (°Ftw); water vapour partial pressure in hPa/H20; water content in ppmV; mixture dewpoint H2O2 in °Ctm/°Ftm; %RH acc. to WMO; temperature in °C/°F |
Meas. range | 0 to 100 %RH |
Temperature Units | Temperature in °C / °F |
Meas. range | Dependent on probe (testo 661x) |
Output | 4 to 20 mA (2 wire, 24VDC) |
Material | Metal |
Channel 1 | % RH min-max |
Channel 2 | Temperature °F min-max |
Cable Entry | Cable bushing M16 X 1.5 (Relays: M20 X 1.5) |
Dimensions | 122 x 162 x 77 mm (without probe) |
Display Resolution | 0.1 %RH / °Ctd / °Ftd / °Ctw / °Ftw or 0.01 °C/°F 1g / kg / g/m³ / ppm |
Humidity Selectable units | Dependent on probe, available are: relative humidity %RH; normed atm. dewpoint in °CtdA (°Ftd); dewpoint in °Ctd (°Ftd); absolute humidity in g/m³ (gr/ft³); degree of humidity in g/kg (gr/lb); enthalpy in kj/kg (BTU/ lb); psychrometer temperature in °Ctw (°Ftw); water vapour partial pressure in hPa/H20; water content in ppmV; mixture dewpoint H2O2 in °Ctm/°Ftm; %RH acc. to WMO; temperature in °C/°F |
Meas. range | 0 to 100 %RH |
Temperature Units | Temperature in °C / °F |
Meas. range | Dependent on probe (testo 661x) |
Output | 4 to 20 mA (2 wire, 24VDC) |
Material | Metal |
Channel 1 | % RH min-max |
Channel 2 | Temperature °F min-max |
Cable Entry | Cable bushing M16 X 1.5 (Relays: M20 X 1.5) |
Dimensions | 122 x 162 x 77 mm (without probe) |
Display Resolution | 0.1 %RH / °Ctd / °Ftd / °Ctw / °Ftw or 0.01 °C/°F 1g / kg / g/m³ / ppm |