FGD5/6-IR Pellistor Replacement Gas Detectors
Detection of Methane and Other Hydrocarbon Gases
Flameproof Fixed Gas Detectors are used in Potentially Explosive Atmospheres where, due to the nature of the environment or the industrial process taking place, there is the risk of an incendive spark from electrical apparatus causing an explosion to occur and the organisation responsible for the safety of the area requires that electrical equipment be enclosed within a flameproof enclosure (also known as an FLP, Ex d or explosion-proof enclosure).
The FGD5/6-IR is for the direct replacement of oil and gas industry ‘pellistor’ types. It does not utilise mirrors, lenses or separate heaters, eliminates the requirement for routine maintenance and minimises operating costs. An optional Weatherguard protects sensor from rain and salt spray and has the option for remote gas testing.
- Certified Ex d IIC to IECEx and ATEX
- Temperature compensated infrared sensor for detection of Methane and other Hydrocarbon gases
- Tested and approved by major oil companies
- Compatible with industry standard control panels
- Eliminates all poisoning problems associated with pellistors
| Size | Body 73mm long x 50mm diameter, thread 20mm long Overall body length with weatherguard fitted = 149mm |
| Material | Sensor Body – Stainless Steel Grade 316 Weatherguard – Stainless Steel Grade 304 & Nylon 66 |
| Mounting thread | M20 X 1.5 or M25 X 1.5 or ½” NPT |
| Weights | 0.67 Kg excluding weatherguard 0.8 Kg including weatherguard |
| Ex d Gas Inlet Protection Method | Stainless Steel Mesh Grade 316 |
| Gas types | Hydrocarbons (Note – Infrared sensors have no response to Hydrogen) |
| Operating voltage at detector head | 3.2 to 7.5 volts dc |
| Maximum short term overvoltage | 24 volts dc |
| Recommended operating currents | Type ‘200’ – 160 to 250mA Type ‘300’ – 250 to 350mA |
| Output signal | 15 to 30 mv / % CH4 (Supplied as 20 mV / % CH4 unless otherwise requested) |
| Measurement range | 0 – 100% LEL (5% vol. CH4), or 0 – 100% LEL (4.4% vol. CH4 to EN 61779-1), or 0 – 100% volume CH4 |
| Response time | Typically T90 < 30 sec (CH4) |
| Measurement resolution | 1% LEL or 1% volume (CH4) |
| IP rating | Enclosure IP66, Sensor IP65 |
| Operating temperature | – 20 to +60 O C |
| Humidity range | 0 to 95% RH non-condensing |
| Operating pressure | Atmospheric + or – 10% |
| Performance standard | EN 61779-1:2000, EN61779-4:2000, EN61779-5:2000 |
| Hazardous Area Certification | |
| Certificate Numbers | IECEx KEM06.0022U, Code Ex d IIC KEMA 03ATEX2247 U, Code Ex d IIC |
| Standards | IEC 60079-0 : 2004 (Edition 4) IEC 60079-1 : 2007-04 (Edition 6) EN 60079-0:2018 EN 60079-1:2014 EN50270:2006 |
| Temperature Codes | Ta -20 to +60 deg C |
| Zones | 1 & 2 |
