Starting at $1,480.00
  • Call for availability



  • 12 to 35VDC power (115 to 240VAC optional)
  • 4-20mA (3-wire) analog, RS-485 Modbus outputs
  • 900MHz or 2.4GHz radio output options
  • Buzzer with either 3-color LED or green LED for alarms
  • 2 Dry contact relays (optional)
  • Graphical LCD with LED backlight
  • 3 Push-button interface
  • 3 Magnetic non-intrusive switches for calibration
  • NEMA Class I, 4, 4X, and 6 polycarbonate enclosure
  • IP 66, UL 508 and UL 746C (f1) rated
  • 1-year warranty


The RKI Instruments Air Alert toxic gas detector uses an electrochemical, infrared or PID sensor element to detect a variety of gases in ambient air. The Air Alert is wire powered 12 to 35VDC (optional 115 to 240VAC available) with 4-20mA 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.

Available in two versions: 

  • Transmitter with 2 relays
  • Transmitter with alarm LEDs (3 color or green only) and buzzer, no relays


  • Petrochemical plants, Refineries
  • Water and wastewater treatment plants
  • Pulp and paper mills
  • Manufacturing facilities
  • Chemical plants