Testo-0609-1773-General-Purpose-Pt 100-Air-Temperature-Probe-Testo-0609-1773-P-The-Testo-0609-1773-is-a-Robust-General-Purpose-Pt 100-Air-Temperature-Probe-It-is-suitable-for-use-with-Testo-523-Testo-556-&-Testo-560-refrigeration-manifolds-&-any-instrument-fitted-with-a-mini-DIN-pt 100-probe-socket-P-Testo-0609-1773-Robust-Temperature-Sensor