Sensitron SMART3G Gas Detectors
Fixed Gas Detection For the Detection of Flammable Compounds, Toxic Compounds and Oxygen Contents
The Sensitron SMART3G series is a versatile gas detector used for the detection of flammable compounds (%LEL), toxic compounds (ppm) and Oxygen contents for both depletion and enrichment in classified areas. The Pellistor sensors can detect an output linearity up to 100% LEL making it a highly reliable and accurate detector.
Alternative sensors are available including an Infrared sensor that is poison free and provides higher accuracy and a longer lifetime to the cell for aggressive atmospheres. The Sensitron SMART3G line offers reliable and suitable applications for various atmospheres.
The SMART3G line has been designed to offer a wide range of alternatives that grant customers the best to their requirements.
SMART3G-C has been specifically designed to offer high-performance products for light industrial applications.
SMART3G-D has been designed to meet with tougher industrial requirements and offer a 4 digits back-lit display and 5 mode status LEDs for the gas concentration reading.
SMART3G are ATEX certified for Group II 2G, 2GD, 3G & GD and for Group I M2.
For more information on the Sensitron SMART3G Gas Detector, contact your local Air-Met office.
Sensitron SMART3G Gas Detector Features include:
- Available in various sensor options
- Long-lasting
- Reliable and accurate
- Protective housing
- SMART3G are ATEX certified for Group II 2G, 2GD, 3G & GD and for Group I M2.
Sensitron SMART3G Gas Detector Specifications
| Sensing element |
Pellistor sensors for flammable gas |
| Measuring range |
%LEL for flammable gases |
| Power supply | 12-24Vdc -20% +15% |
| Consumption at 12Vdc |
90mA (medium); 130mA (max) Pellistor |
| Visual indications |
SMART3G-C: flickering LED |
| Display characteristics (SMART3G-D) | 4 digits, 7.5 mm high, 7 segments |
| Proportional output | 4-20 mA (200 Ω) |
| Serial Output (optional) |
RS 485 and proprietary protocol for |
| Relay outputs, with mode status LEDs (optional) |
3 relays with tension-free changeover contact 24V-1A (non-latching type) |
| Repeatability |
from ±2% to ±5% FS (depending on |
| Warm-up time |
2 minutes |
| Stabilisation time | 60 minutes (for test/calibration) |
| Response time T90 | From 15 to 30 sec. for Pellistor and <60 sec. for other sensor types |
| Storage temperature |
-25°C ÷ +60°C (or limits of the sensor) |
| Operating temperature | -20°C ÷ +60°C (-40°C ÷+65°C or 75°C on request) for Pellistor and IR sensors, -20°C ÷ +50°C for cells Always refer to the detector's label |
| Relative humidity |
20-90% RH / 40°C (5-95% RH non-condensing on request) |
| IP rating |
IP65 for II 2G(D) (IP67 with: STGD/AD3 adapter and IP67 cable gland); |
| Operative pressure | 80-110 KPa |
| Max. air velocity | < 6 m/s |
| Weight |
850÷1200 g Ex n 950÷1700 g Ex d |
| Dimension (approx.) |
Ex d L.130 H.180 D.90 mm (max) Ex n L.106 H.180 D.65 mm (max) |
| Orientation | The detector must be mounted sensor head downwards |
| Certificates |
CESI 17 ATEX 003X (ESR II 2G/2GD) CESI 16 ATEX 046X (Intrinsic Safety) CESI 02 ATEX 084 (Performance) IECEx CES 17.0011X & 17.0010X |
| EMC Reference Standards | EN 50270, EN 61000-6-4 |
Sensitron SMART3G Gas Detectors Applications include:
- Refineries
- Compressor Stations
- Pharmaceutical Plants
- Petrochemical Plants
- Gas Turbines
- LNG/LPG Storage Facilities
- Laboratories
