The high-quality testo 315-3 is an easy to use, ruggedly designed CO and CO<sub>2</sub> meter for quick and reliable ambient measurements according to DIN EN 50543 standard.

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The humidity module can be attached to the handle of the testo 625 thermohygrometer (available to order separately) to enable temperature and humidity measurement in inaccessible places. You can use the humidity module in combination with an appropriate Testo radio handle and measuring instrument (both available to order separately) for wireless measurement.

Humidity module for testo 625 and radio handles 

Plug-in humidity probe head replacement for 625

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Temperature - NTC	Measuring range 14.0° to 140.0 °F / -10 to +60 °C
	Accuracy ±0.9 °F / ±0.5 °C
	Resolution 0.1 °F / 0.1 °C

Humidity - Capacitive	Measuring range 0 to +100 %rH
	Accuracy ±2.5 %rH (+5 to +95 %rH)
	Resolution 0.1 %rH

Plug-in humidity probe head replacement for 625

Plug-in humidity probe head replacement for 625

Temperature - NTC

Temperature - NTC

Humidity - Capacitive

Humidity - Capacitive