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Fieldpiece JL3RH Flex Psychrometer Probe The Fieldpiece JL3RH Job Link Flex Psychrometer Probe with Remote Data Logging sends air measurements directly to the Fieldpiece Job Link app up to 350' away. The JL3RH Job Link Flex Psychrometer Probe with Remote Data Logging measures %RH, dry bulb, wet bulb, dew point, and enthalpy at a register/grille, in the duct, or just walking around. Bend the flexible probe and slide the magnet to conveniently configure the JL3RH Job Link Flex Psychrometer Probe with Remote Data Logging to your situation. The rubberized protective housing of the JL3RH Job Link Flex Psychrometer Probe with Remote Data Logging is both ergonomic and rugged for daily use. Flip the switch and the Job Link app immediately knows which side of the system you're going to place your JL3RH Job Link Flex Psychrometer Probe with Remote Data Logging. Use the JL3RH Job Link Flex Psychrometer Probe with Remote Data Logging for its long wireless range, strong magnet, and flexible probe for quick and easy psychrometrics testing.Features: LED color indications High or low side switch Rapid Rail sensor advantage Remote data logging Auto power off (APO)Learn more with this Job Link How To's video playlist.