Gas Detection
FGD14 Safe Area Gas Detector
Safe-area fixed detector for oxygen and toxic gases with remote visual and audible alarm unit.
SS
Status Scientific Controls Ltd.
FGD3 Intrinsically Safe Fixed Gas Detector
Ex 'ia' intrinsically safe fixed gas detector for flammable, toxic and O2 hazards.
Key Features
- Suitable for Zone 1 and 2 hazardous areas when used with an appropriate IS supply
- Digital LCD display of gas reading
- Single-operator calibration
- Inbuilt sensor diagnostics
- Industry-standard 4–20 mA output
- Plug-in sensor options (electrochemical, pellistor or NDIR infrared)
- 2 or 3-wire connection depending on sensor type
- Metal enclosure available for IR versions (enhanced RFI immunity)
- Optional weather guard
Overview
The FGD3 is an intrinsically safe fixed gas detector engineered for use in potentially explosive atmospheres, where an electrical fault must not be capable of producing an incendive spark. It is used across industrial processes such as water treatment, pharmaceuticals and chemical manufacturing, wherever flammable, toxic or oxygen-deficient hazards exist in a hazardous area.
Working Principle
A plug-in sensor head (pellistor, electrochemical or infrared, depending on target gas) measures the gas concentration and outputs a 4-20 mA signal. Because the detector is intrinsically safe, it must be connected through an approved electrical safety barrier that limits energy transmission between the hazardous-area detector and safe-area equipment, ensuring any fault condition stays below the energy needed to ignite an explosive atmosphere.
Applications
Benefits
- Intrinsically safe operation in Zone 1 & 2 areas
- Plug-in sensors simplify field servicing and calibration
- Plastic or metal enclosure to suit the environment
- Flammable, toxic and oxygen detection from one platform
Technical Specifications
| Protection | Intrinsically safe, Zones 1 & 2 (with appropriate IS supply) |
|---|---|
| IS Output Module SS359 | II (1) G [Ex ia Ga] IIC; CSANe 23ATEX1066X, CSAE 22UKEX1444X |
| Operating Voltage | 8–24 V DC for 4–20 mA signal (IR and pellistor versions need an additional DC sensor supply) |
|---|---|
| Output | 4–20 mA (2 mA fault, 22 mA over-range) |
| Wiring | 2 or 3-wire, depending on sensor type |
| Sensor Types | Electrochemical, pellistor (catalytic bead) or NDIR infrared |
|---|---|
| Example Ranges | O2 0–21 %; CO 0–50/100/500 ppm; H2S 0–50 ppm; CO2 0–2 %/0–5 %; flammable 0–100 % LEL or 0–100 % vol |
| Note | Infrared sensors have no response to hydrogen |
| Material | Plastic (ABS/polycarbonate blend) or cast aluminium alloy |
|---|---|
| IP Rating | Enclosure IP66, sensor IP65 |
| Dimensions | 122 × 122 × 75 mm |
| Weight | Plastic 660 g; metal 1 kg; weather guard 225 g |
| Display | LCD |
| Operating Temperature | Typically -20 to +50 °C (sensor dependent) |
Downloads
FGD3 Datasheet (PDF)PDF
Frequently Asked Questions
What warranty is offered on this product?
All Tetracon-supplied instruments carry the original manufacturer warranty (typically 12–24 months) plus first-line local support from our Islamabad service centre.
Do you provide installation and commissioning?
Yes. Our manufacturer-trained engineers offer on-site installation, commissioning and startup training anywhere in Pakistan.
Are spares and calibration available locally?
Common spares are held in local stock. Calibration is available at our lab or on-site with NIST-traceable reference standards.
How long is the typical lead time?
Stocked items ship within 3–5 working days; engineered configurations typically 6–10 weeks depending on manufacturer schedule.
Request a Quote — FGD3 Intrinsically Safe Fixed Gas Detector
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