Models differ in sensor technology:
Click illustrations or links to the left for model specific information.
 

Series 400 Moisture / Dewpoint Hygrometer utilizes Aluminum Oxide Capacitance Sensor and offers a choice of intrinsically safe or general purpose sensors to meet any environmental constraint.

Series 500 Moisture Analyzer uses a Phosphorus Pentoxide (P2O5) moisture sensor and offers the advantage of a sensitive 0.1 ppm to 1000.0 ppm range.

All Illinois Instruments’ transducers are made to laboratory standards of precision and industrial standards of durability. Stainless steel housings, lab grade components and controlled environment manufacturing ensure the finest, most consistently precise sensors and transducers in the industry.