Plug-in humidity probe head 0636 9725 is for use with testo Series 315 CO gas detector models such as the 315-4 ( 920-5497 ), the testo 625 thermohygrometer ( 735-6757 ) and testo radio handles. The humidity module enables temperature and humidity measurement in inaccessible places. Operators can use the module in combination with an appropriate testo radio handle and measuring instrument for wireless measurement.

Can be attached to the testo 315, 625 and testo radio handles
For wireless humidity measurements (with radio handle)
Temperature measuring range -10 to +60 °C
Temperature minimum -10 °C
Temperature maximum +60 °C
Resolution, temperature maximum 0.1 °C
Humidity measurement range minimum 5%
Humidity measurement range maximum 95%
% rh resolution 0.1%

Need to measure temperature or humidity in your work environment? Choose this humidity module from Testo. It plugs straight into the Testo 625 thermohygrometer (735-6757) for quick assembly, letting you start taking readings at once. As it has a wide temperature measurement range of -10°C to +60°C, it's suitable for use in demanding environments. You can also plug this module into Testo radio handles to take measurements in tight or difficult-to-access areas.

• Small diameter of 25mm for use in confined spaces
• Wide humidity measurement range of 5% to 95%RH for use in dry and damp environments

• Greenhouses
• Warehouses
• Archives and storerooms

No, the Testo 625 thermohygrometer is battery-powered, so there's no need for an external power source.