Testo Plug-In and Humidity Module for Use with testo 315, testo 625

testo Plug-in Humidity Probe Head. 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 920-5497 ), the testo 625 thermohygrometer ( ; 735-6757 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. Features and Benefits. 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%