Model 645 Handheld Hygrometer

Model 645 for portable accurate humidity measurements offers modular design, incorporates a1% maintenance free humidity probe ideal for checking humidity measurements for validation of critical environments.


The hygrometer is rugged, compact and protected by a waterproof plastic housing. The humidity measuring range is 0-100%RH with an accuracy of ±1%RH 10-90%, ±2% remaining range.

Model 645 Handheld Hygrometer Data sheet