Client Protection
Dedicated Support
Crowcon SMART 3G-C2 | ATEX Zone 1 Fixed Gas Detector | 50+ gases, SIL2, 4-20 mA, optional relays
The SMART 3G-C2 is a Sensitron fixed detector sold by Crowcon, certified ATEX Category 2 for Zone 1 and offered with catalytic, infrared or electrochemical sensors for more than 50 flammable, toxic and refrigerant gases. It outputs 4-20 mA, with a 1- or 3-relay board and RS485 Modbus as options. A zero tracker counteracts drift and the unit runs continuous self-diagnosis.
Key features
- SIL2 hardware and SIL3 software
- Die-cast aluminium enclosure with chemically resistant epoxy paint, IP65
- Intrinsically safe detector version for some toxic gases
- Optional interface for ATEX II2GD approval
- Data logger exportable with STS/CKD-OLED or STS/CSW+
- Specifications
- Downloads
| Part Number | SMART 3G-C2 |
| Brand | Crowcon |
| Gases | 50+ flammable, toxic and refrigerant gases (catalytic, IR, EC) |
| Size | 120 x 184 x 90 mm (cat/EC); 138 x 200 x 119 mm (IS) |
| Weight | 1.25 kg; 2.7 kg (IS) |
| Enclosure | Die-cast aluminium, epoxy painted |
| Ingress protection | IP65 |
| Connection | 3 x 3/4" NPT |
| Power | 12-24 Vdc |
| Outputs | 4-20 mA; 1 or 3 relays (optional); RS485 (optional) |
| Operating temperature | -40 to +60 °C (cat); -30 to +55 °C (EC); -20 to +50 °C (IS) |
| Response time | t90 <60 s; t50 <20 s |
| Functional safety | SIL2 hardware, SIL3 software |
| Approvals | EMC, ATEX, IECEx |
Related Products
Crowcon Fgard UVIR | UV/IR Flame Detector | 3 sensitivity settings, <5 s response
Crowcon Fgard UVIR | UV/IR Flame Detector | 3 sensitivity settings, <5 s response
Crowcon Fgard H2 | Hydrogen Flame Detector | H2 flames at 40 m, 2-5 s response, SIL2
Crowcon Fgard H2 | Hydrogen Flame Detector | H2 flames at 40 m, 2-5 s response, SIL2
Crowcon SMART S-MS MED | Marine Flammable Gas Detector | Cat or IR, MED/3.54, SIL2
Crowcon SMART S-MS MED | Marine Flammable Gas Detector | Cat or IR, MED/3.54, SIL2
Crowcon SMART P-2 | Car Park Dual-Gas Detector | CO plus NO2 or petrol vapour, RS485
Crowcon SMART P-2 | Car Park Dual-Gas Detector | CO plus NO2 or petrol vapour, RS485
Crowcon Fgard IR3 | Multi-Spectrum IR Flame Detector | 0.1 m² fire at 60 m in <5 s, SIL2
Crowcon Fgard IR3 | Multi-Spectrum IR Flame Detector | 0.1 m² fire at 60 m in <5 s, SIL2
Crowcon SMART 3-NC | Safe-Area Point Gas Detector | CH4, LPG, CO, NO2, CO2, 4-20 mA, IP55
Crowcon SMART 3-NC | Safe-Area Point Gas Detector | CH4, LPG, CO, NO2, CO2, 4-20 mA, IP55
Crowcon SMART S-MS | SIL Fixed Gas Detector for Heavy Industry | Cat or EC head, HART option, Ex db IIC T5
Crowcon SMART S-MS | SIL Fixed Gas Detector for Heavy Industry | Cat or EC head, HART option, Ex db IIC T5
Crowcon SMART 3 BLIZZARD | Infrared Refrigerant Gas Detector | IR, 4-20 mA, 2 relays, wireless app
Crowcon SMART 3 BLIZZARD | Infrared Refrigerant Gas Detector | IR, 4-20 mA, 2 relays, wireless app