Duct Gas Sensor (DFGS)

The Flamefast Duct Mounted Gas Sensor provides is one of the most versatile gas sensors available on the market.  

With an Analogue and Relay output, as well as a BACnet MS/TP interface, the DFGS can connect directly into most  third-party controllers,  all housed in a robust duct enclosure for monitoring supply or return air systems. 

Top Key Features

  • 24 AC/DC Power Supply
  • Pre-calibrated
  • Traffic light LCD readout
  • Volt free contact output
  • UK Manufactured

Overview

The Flamefast Duct Mounted Gas Sensor provides is one of the most versatile gas sensors available on the market. 

With an Analogue and Relay output, as well as a BACnet MS/TP interface, the DFGS can connect directly into most  third-party controllers,  all housed in a robust duct enclosure for monitoring supply or return air systems. 

The broadband Pellistor and Infra-red Hydro-carbon sensors can be calibrated to suit most combustible gases with the option to factory callibrate  and rename the sensor for the specific gas. Flamefast can also offer a full range of toxic gas sensors, including H2S, HCN and many more (please contact for details). 

Key Features

  • 24 AC/DC Power Supply
  • Pre-calibrated
  • Traffic light LCD readout
  • Volt free contact output
  • BACnet MS/TP  over RS485
  • Latching function with Reset input
  • Analogue output
  • Simple configuration and calibration
  • Calibration and ‘End of Life’ reminders
  • Oxygen Sensors monitor Enrichment and Depletion as standard
  • 200mm Duct Probe
  • UK MANUFACTURED

Dimensions

Height:152 mm
Width:110 mm
Depth:50 mm
Probe Length:200 mm

Technical Specifications

Power Supply:24V AC/DC ± 10%
Power Consumption:100mA
BACnet:MS/TP over RS485
Baud: 9k6, 19k2, 38k4 or 76k8
127 Address (1/10th Load)
Full specification available on request
Analogue Outputs:0/2-10V Full scale linear
VFC Output:SPDT - 1A @ 24V Max
Audible:60dB @30cm
Operation Conditions:
Temp 5-40°C
Humidity 0-95% (NC)
Sampling Method:Diffusion
Warm-up Time:60 Seconds (24 Hours for full stability)
Response Time (T90):< 60 Seconds (Adjustable)
Housing Material:PC/ABS
IP Rating:IP66 (external to duct)
Colour:Black/Clear
Approval:CE, UKCA

Installer Selectable Options

LCD backlightEnable/Disable
Failsafe optionEnergise/De-energise Relay
 0-10V or 2-10V
Alarm LatchingEnable/Disable
Audible AlarmEnable/Disable
Auto Zero CalibrationEnable/Disable
Alarm1, Alarm 2 & Relay Set-points
Analogue Output Range
Display Gas Concentration or Formula
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Quality and Reliability as Standard

Part NoGasRangeTypical Life (years)
DFGS-NGNatural Gas (Methane)100% LEL5
DFGS-LPGPropane100% LEL5
DFGS-H2Hydrogen (LEL)100% LEL5
DFGS-HCHydro-carbon (Pellistor)100% LEL5
DFGS-IRHCHydro-carbon (Infra-red)100% LEL5
DFGS-SF6Sulfur Hexafluoride1,000ppm5
DFGS-CO2Carbon Dioxide5%5
DFGS-COCarbon Monoxide (Plant/Carpark)200ppm5
DFGS-NO2Nitrogen Dioxide5ppm3
DFGS-NH3Ammonia100ppm3
DFGS-CL2Chlorine5ppm3
DFGS-H2eHydrogen (Electrochemical)2,000ppm3
DFGS-SO2Sulphur Dioxide5ppm3
DFGS-O2Oxygen25%5

OTHER GASES AVAILABLE ON REQUEST

Data Sheets

General specifications in .pdf format

Operation Manuals

Installation and Operation instruction in .pdf format

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