Crowcon Sensitron SMART 3G-D3 Gas Detector with Electrochemical sensor

Code: S2642O2
  • Toxic gas and O2
  • Designed for Industrial areas
  • Approval ATEX Zone 2 & Zone 22

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The SMART 3G-D3 Gas Detector with Electrochemical sensor is designed to meet industrial requirements; the enclosure is explosion-proof and can be installed in ATEX Zone 2 and, when equipped with a dust adapter, in Zone 22.

The sensing element is placed in the stainless steel head with a 47.5 mm diameter. Due to the optimal performance in these applications, the electrochemical cell detects toxic gas.

The gas detector has a 12-24 Vdc power supply, a standard 4-20 mA 3-wires output, and three relays. Optionally, the SMART3G-D3 can be equipped with serial RS485 communication.

The enclosure has dimensions 106 x 160 x 81 mm; on the upper side, there’s a M20 cable gland. The SMART3G-D3 features a 7-segment display for real-time concentration visualization and Hall effect sensors for non-intrusive field calibration.

SMART3G-D3 is SIL2 hardware and SIL3 software; with a redundant system, the hardware is SIL3.

Order Information

SMART3G-D3 – TOXIC GAS (Electrochemical cell)
S2642O2 OXYGEN (O2) detector, 0-25% Vol., 4-20 mA
S2162CO CARBON MONOXIDE (CO) detector, 0-500 ppm, 4-20 mA
S3226AM AMMONIA (NH3) detector, 0-100 ppm, 4-20 mA
S2164AM AMMONIA (NH3) detector, 0-200 ppm, 4-20 mA
S2166AM AMMONIA (NH3) detector, 0-1000 ppm, 4-20 mA
S3230AM AMMONIA (NH3) detector, 0-5000 ppm, 4-20 mA
S2168HS HYDROGEN SULPHIDE (H2S) detector, 0-50 ppm, 4-20 mA
S2176NO NITRIC OXIDE (NO), 0-100 ppm, 4-20 mA
S3594H2 HYDROGEN (H2) detector, 0-2000 ppm, 4-20 mA
S4548H2 HYDROGEN (H2) detector, 0-3000 ppm, 4-20 mA
ACCESSORIES 
STS/CSW+ Calibration software for SMART3G, SMART3NC & SMART3R detectors consisting of a USB key, a USB/RS485 converter and the STS/IDI card. The software runs on Windows XP, Windows 7 & Windows 10. The calibration software allows the modification of the alarm thresholds and the measuring range and allows adjusting the Zero, Span and 4-20 mA values via a user-friendly menu, either in situ or in the laboratory.
STS/IDI Plug-in interface for RS485 serial communication suitable for SMART3G
STGD/AD3 Adapter for all sensor heads (exception made for S2096__ & S2097__) to upgrade the protection from G to GD

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Title Size
SMART3G-D3 Electrochemical Datasheet 1 MB

Additional information

Weight 0.190 kg

Specifications

Sensor
Application Industrial area, ATEX Zone 2 and Zone 22 (when equipped with dust adapter, optional)
Sensing element Electrochemical cell
Predicted sensor lifetime 2 / 3 years
Gas detected O2 [0-25% Vol], CO [0-500/1000 ppm], NH3 [0-100/200/1000/5000 ppm], H2S [0-50/100 ppm], NO [0 – 100 ppm]; H2 [0 – 2000/3000 ppm]
Electrical data
Power supply 12-24 Vdc
Output Analogue 4-20 mA output; 3 relays; serial RS485 output (optional)
Maximum dissipated power 5.4 W
Relays contact ratings 1.0 A at 24 Vdc
Optical indications 7-segment display, 5 status LED and 4 intelligent LED
Acoustic indications –
Hall effect sensor Three sensors for calibration by magnet
Environmental conditions
Storage temperature 0 / +20°C up to six months
Operating temperature -30 / +50°C
Operating humidity 15 / 90% RH non condensing
External case
Material Enclosure: Aluminium
Sensor head: stainless steel
Protection mode Ex e: Increased safety protection mode
Ex nC: Enclosed equipment protection mode
Ex d : Explosion proof enclosure
Ex t : Equipment dust ignition protection by enclosure (when equipped with dust adapter, optional)
Dimensions 106 x 160 x 81 mm
Weight 1210 g
Cable entries 1 x M20
IP grade IP55 (certification pending)
Compliance
EMC EN 61000-6-3:2007 + A1:2011; EN 50270:2015
ATEX ATEX directive 2014/34/EU (certification pending)
EN IEC 60079-0:2018
EN 60079-1:2014
EN 60079-7:2015
EN 60079-15:2010
EN 60079-31:2014
SIL EN 61508:2010 Parts 1, 2, 3, 4, 5, 6, 7
EN50402:2017

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