The Otis Instruments OI-6000 Series Ambient Air Toxic Gas Detector is a versatile assembly that uses an electrochemical, infrared or PID sensor element to detect a variety of gases. Wired powered (12 to 35 VDC) with 4-20 mA analog and RS-485 Modbus outputs. Magnetic switches allow for non-intrusive calibration while in the field as well as full system settings and diagnostics.