The RKI Instruments AirLink 6940XP Wireless Quad Transmitter uses up to four electrochemical, PID or low-power infrared sensor elements to detect a variety of gases. Wireless, battery power (3.6 V/76 Ah) with 900 MHZ or 2.4 GHz radio communication options. Magnetic switches allow for non-intrusive calibration while in the field as well as full system settings and diagnostics.
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