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Crowcon SMART 3G-D3 | Compact Fixed Gas Detector with Display | 4-digit display, 3 relays, IP55
The SMART 3G-D3 is a compact Sensitron fixed detector in the Crowcon range, 106 x 160 x 81 mm and 1.21 kg in aluminium, with a 4-digit backlit display. It carries three relays and a 4-20 mA output as standard, plus optional RS485, and covers gases such as NH3, CO, H2S, H2, NO, O2, IR methane, propane, butane, CO2 and common refrigerants. It is suited to oxygen deficiency or excess detection in Zone 2.
Key features
- Three relays fitted as standard
- 4-digit backlit display
- Single M20 cable entry
- SIL2 hardware, SIL3 software
- Infrared option for refrigerants such as R32 and R744
- Specifications
- Downloads
| Part Number | SMART 3G-D3 |
| Brand | Crowcon |
| Gases | NH3, CO, H2, H2S, NO, O2 (EC); CH4, LPG, propane, butane, CO2, refrigerants (IR) |
| Size | 106 x 160 x 81 mm |
| Weight | 1.21 kg |
| Enclosure | Aluminium |
| Ingress protection | IP55 |
| Connection | 1 x M20 |
| Power | 12-24 Vdc |
| Outputs | 4-20 mA; 3 relays; RS485 (optional) |
| Operating temperature | -40 to +60 °C (cat/IR); -30 to +50 °C (EC) |
| Response time | t90 <60 s; t50 <20 s |
| Functional safety | SIL2 hardware, SIL3 software |
| Approvals | EMC, ATEX |
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