Sensitron SMART3G Gas Detector Features include:
Available in various sensor options
Long-Stabality lasting
Reliable and accurate
Protective housing
SMART3G are ATEX certified for Group II 2G, 2GD, 3G & GD and for Group I M2. 
Suitable for hazardous locations
 
Sensitron SMART3G Gas Detector Specifications
 
 
 
Sensing element
Pellistor sensors for flammable gas
Electrochemical cells for toxic gas
IR sensors for HC, CO2, SF6, Refrigerant
Measuring range
%LEL for flammable gases
ppm for toxic gases and refrigerants
% vol for O2 and CO2
Power supply
12-24Vdc -20% +15%
Consumption at 12Vdc
90mA (medium); 130mA (max) Pellistor
50mA (medium); 70mA (max) electr.cell
90mA (medium); 130mA (max) IR
Visual indications
SMART3G-C: flickering LED
SMART3G-D: 3 red LED's for Alarm
yellow for Fault, green for PS
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
addressable gas control panels
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
sensor type)
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);
IP55 for II3GD
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
 
 
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.