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Elsec Humidity Calibration Kit for 764(C). Allows user to recalibrate humidity sensor (needs to be done approx every year). Supplied with enough chemicals for about 4 refills.

• Comprises 2 test chambers, pure water and 2 RH standard chemicals to test RH at 33%RH and 75%RH
This kit can also be used to recalibrate the obsolete 764 humidity sensor.