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Plug in probe head only for RH, +/-2.5%
Does not include wireless handle, Photo represents configured probe.
0554 0191 - Wireless Handle (with thermocouple adapters)
accepts a plug in thermocouple (with included socket) or a humidity probe head sensor (0636 9736) and beams sensor data to a testo wireless module (which is installed in a compatible testo meter)
0554 0190 - Wireless Module
inserts inside a compatible testo meter to enable reception of wireless data from a testo wireless probe handle