The RKI EC-600 is a compact, wall-mounted fixed CO monitor using an electrochemical sensor for stable, selective carbon monoxide detection at low concentrations (0-150 ppm), sampled by diffusion. A three-color LED and audible buzzer drive two-stage latched alarms at 50 and 100 ppm, with dry-contact relay outputs (Form A) for each alarm level.

Available in battery (2xAA), 24VDC, or 115VAC powered versions — with optional 3, 5, 10, or 20 meter remote sensor cables and a CSA-certified variant for hazardous-location installs — the EC-600 is a straightforward, low-cost option for parking garages, mechanical rooms, and other point-source CO monitoring applications.