Duct Flamefast 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
- BACnet and Modbus
- 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.
In a large proportion of modern buildings, the plant room safety systems are BMS integrated, and the FGS has been designed with this in mind. It can be treated like any other field sensor, the latching facility allows direct integration with the primary safety circuit, then simply pulse the Digital Input, or reset over the BACnet network once the alarm has cleared. This negates the requirement for a controller, cutting down cost of the equipment and installation.
Key Features
- 24 AC/DC Power Supply
- Pre-calibrated
- Traffic light LCD readout
- Volt free contact output
- BACnet and Modbus
- Latching function with Reset input
- Analogue output
- Simple configuration and calibration
- Calibration and ‘End of Life’ reminders
- Mounts onto any standard single gang junction box or conduit box
- UK MANUFACTURED
Dimensions
| Height: | 158 mm |
|---|---|
| Width: | 112 mm |
| Depth: | 58 mm |
| Probe Length: | 180 mm |
Technical Specifications
| Power Supply: | 24V AC/DC ± 10% | ||||
|---|---|---|---|---|---|
| Power Consumption: | 100mA | ||||
| Output: | BACnet MS/TP and Modbus RTU Baud: 9600, Addresses: 32 Customisable through App with USB | ||||
| Analogue Outputs: | 0/2-10V Full scale linear | ||||
| VFC Output: | SPDT - 1A @ 24V Max | ||||
| Audible: | 60dB @30cm | ||||
| Operation Conditions: |
| ||||
| Sampling Method: | Diffusion | ||||
| Warm-up Time: | 60 Seconds (24 Hours for full stability) | ||||
| Response Time (T90): | < 60 Seconds (Adjustable) | ||||
| IP Rating: | IP66 (external to duct) | ||||
| Housing Material: | PC/ABS | ||||
| Colour: | Grey/Black/Clear | ||||
| Approval: | CE, UKCA |
Installer Selectable Options
| Failsafe option | Energise/De-energise Relay |
| 0-10V or 2-10V | |
| Alarm Latching | Enable/Disable |
| Audible Alarm | Enable/Disable |
| THROUGH APP | |
| LCD Back Light | Enable / Disable |
| Auto Zero Calibration | Enable/Disable |
| Set-points | Alarm1 / Alarm 2 / Relay |
| Range | Analogue Output Scaling |
| Display | Gas Concentration / Formula |
| BACnet Properties | Identifier, Description, Location |



Quality and Reliability as Standard
Part Numbers & Options / Accessories
| Part No | Gas | Range | Typical Life (years) |
| DFGS-NG | Natural Gas | 100% LEL | 5 |
| DFGS-LPG | Propane | 100% LEL | 5 |
| DFGS-H2 | Hydrogen (LEL) | 100% LEL | 5 |
| DFGS-SF6 | Sulfur Hexafluoride | 1,000ppm | 5 |
| DFGS-CO2 | Carbon Dioxide | 5% | 5 |
| DFGS-CO | Carbon Monoxide | 200ppm | 5 |
| DFGS-NO2 | Nitrogen Dioxide | 5ppm | 3 |
| DFGS-NH3 | Ammonia | 100ppm | 3 |
| DFGS-CL2 | Chlorine | 5ppm | 3 |
| DFGS-H2e | Hydrogen (Electrochemical) | 1,000ppm | 3 |
| DFGS-SO2 | Sulphur Dioxide | 5ppm | 3 |
| DFGS-O2 | Oxygen | 25% | 5 |
OTHER GASES AVAILABLE ON REQUEST
Data Sheets
General specifications in .pdf format







