For sale - TESTO 0554 0638 DRYWELL CALIBRATOR
Calibration Control Set:
NaCI solution, 75.3% RH ±1% RH
75.3%rh calibration standard for Testo 600
Operating temperature, -20 to +30°C
Service life: constant use 1 month, occasional use and tightly sealed 2 years
For use with Testo 615//625 (not illustrated or included)
(box cnb1)