SenSmart 3900 DUAL

SenSmart 3900 DUAL

SenSmart 3900 DUAL

The SenSmart 3900 3-wire gas detector is built with our reliable ‘ST-48’ smart transmitter, which provides the cutting-edge technology in toxic and combustible gas detection. It’s a universal, easy to use detector that supports dual smart sensor with different types, including electrochemical, Catalytic Bead, Infrared and Photoionization sensors.


  • CSA Certified for Class I, Div 1 Locations
  • Graphic LCD display shows values, units, trend graph, alarm levels
  • Backlit display for better visibility in low light conditions
  • LED indication of alarm status
  • Dual smart sensor capable
  • Supports both local and remote sensors for easy installation
  • Non-intrusive, prompted calibration with programmable cal-gas
  • Power-up and post-calibration delays eliminate false alarms
  • Options for 3x 5A alarm contacts, isolated 4-20mA and MODBUS®
  •  Auto-recognition of Smart Sensors uploads calibration data and more
  • Real-time clock and calendar logs alarms, calibration and power-up events
  • Security mode allows locking of critical parameters
  • Fault supervision circuitry detects failed sensor and transmits warning
  • Setup in hazardous area requires only simple magnetic wand



3900-002271 Specifications

  • SenSmart 3900:
  • Area Classification: Division 2 Non-Incendive
  • Enclosure Type: Aluminum
  • 3-Wire/Heated Models: Standard 3-wire Model
  • Output Option: Standard 4-20mA Output
  • Sensor 1 Gas/Input Type: 4-20mA Input
  • Sensor 1 Sensor Type: Analog Input
  • Sensor 1 Range: Analog Input
  • Sensor 1 Location: 4-20mA Input for Aluminum/Stainless Steel Enclosure
  • Sensor 2 Gas/Input Type: Methane
  • Sensor 2 Sensor Type: 10-9050 Smart Sensor, IR with Arctic Heater, Methane
  • Sensor 2 Range: 0-100% LEL
  • Sensor 2 Location: Remote Mount with Splash Guard