HydroKnowz™ monitors use catalytic sensors to measure hydrogen in air up to 25,000 ppm (2.5% volume).

These sensors feature VOC filters, good long term stability, native linearity, increased tolerance of silicone-based contaminants, and are immune to overexposure damage.

Options include 3VDC (regulated) or 6-40VDC / 6-55VDC operation, dry relay contacts, alarm beeper, 0-3VDC / 4-20mA (proportional) or TTL (binary) output signal.