The RKI AirLink 6940XP is a wireless quad-channel gas transmitter supporting up to four electrochemical, PID, or low-power IR sensors. It is battery powered with a 3.6V/76Ah battery and communicates via 900MHz or 2.4GHz radio to RKI controllers.

Magnetic switches allow non-intrusive calibration and system diagnostics in the field. Features include graphical LCD with LED backlight, 4 push-button interface, and hazardous location approvals (Class I, Div 1&2, Groups B,C,D). Operating temperature range -40° to 140°F. Applications include petrochemical plants, refineries, water/wastewater treatment, pulp and paper mills, and chemical plants.