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SMART 3G-C2

Manufacturer: Crowcon
IECEx Certificate
SIL Functional Safety Assessment Certificate
SMART 3G-C2 Datasheet
SMART 3G-C2 Manual (Flammable Gases) – Italian / British English
SMART 3G-C2 Manual (Toxic Gases) – Italian / British English
SMART 3G-C2 Quick Start Guide – Italian / British English

The SMART 3G-C2 from Sensitron fixed gas detector has sensor options for detecting more than 50 toxic, flammable and refrigerant gases. It is ideal for a variety of industrial applications and harsh environments. The device also features ongoing system self-diagnosis and optional RS485 interface for Modbus communication.

The  Sensitron SMART 3G-C2 is a SIL2 certified fixed gas detector ideal for a variety of industrial applications, capable of monitoring toxic, flammable and refrigerant gases in harsh environments and classified areas.

ATEX Category 2 certified for Zone 1, the SMART3G-C2 has been designed to offer high performance for civil and industrial applications.

The SMART3G-C2 has a range of sensor options for the detection of over 50 flammable, toxic and refrigerant gases, and with ongoing system self-diagnosis you can be confident that your setting is safeguarded from build-up of dangerous gasses. The SMART 3G-C2 also monitors for the detection of oxygen deficiency or excess, and allows for field calibration via the STS/CKD+ calibration hand-held keypad.

  • Detect more than 50 gases
  • Suited to harsh environments
  • Ongoing system self-diagnosis
  • Optional relay output and RS485 interface
  • Optional interface for ATEX II2GD approval

Variety of Gas & Sensor Options

  • The SMART 3G-C2 has options for the detection of over 50 flammable, toxic and refrigerant gases
  • Ideal for detection in classified areas, providing high performance in civil and industrial applications
  • Choice of catalytic, infrared and electrochemical sensor options, customisable for your site needs

Rigorous Safety Standards

  • Safety Integrity Level (SIL) certified, featuring SIL2 hardware and SIL3 software
  • A redundant system with SIL3 hardware
  • Capable of withstanding harsh environments
  • IP65 rated
  • Zero tracker to counteract possible drift
  • Continuous self-diagnosis to ensure you’re always compliant

Title TabFlexible Installation Options

  • Optional 1 or 3 relay output board
  • Optional RS485 interface for communication with Modbus protocol
  • Wide range of usable sensors to optimise gas detection according to your site needs
  • Wide choice of accessories for installation and maintenance
  • Easy sensor replacement
  • Exportable data logger exportable with STS/CKD-OLED or STS/CSW+
  with catalytic sensor with electrochemical sensor intrinsically safe detector
Size H120 x W184 x D90 mm (4.7 x 7.2 x 3.5ins) H138 x W200 x D119 mm (5.4 x 7.9 x 4.7ins)
Weight 1.25kg 2.7kg
Enclosure material Aluminium pressure die-casting with epoxy paint chromating and chemically resistant
Ingress Protection IP65
Connection 3 x 3/4” NPT
Power 12-24 Vdc
Electrical output Analogue 4-20 mA output; 1 or 3 relay board (optional); serial RS485 output (optional)
Operating temperature -40 / +60°C -30 / +55°C -20 / +50°C
Humidity 20 / 90% RH @40°C 15 / 90% RH non condensing 15 / 90% RH non condensing
Response time t90 < 60 s ; t50 < 20 s    
Functional safety SIL2 hardware and SIL3 software
Approvals EMC, ATEX, IECEx
  Sensor type  
Acetic Acid (CH3COOH) Catalytic sensor  
Acetone (C3H6O) Catalytic sensor / Infrared sensor  
Acetylene (C2H2) Catalytic sensor  
Ammonia (NH3) Catalytic sensor / Electrochemical sensor  
Benzene (C6H6) Catalytic sensor  
Butadiene (C4H6) Infrared sensor  
Butane (C4H10) Catalytic sensor / Infrared sensor  
Carbon Monoxide (CO) Catalytic sensor / Electrochemical sensor  
Chlorine (CL2) Electrochemical sensor (intrinsically safe detector)  
Cyclohexane (C6H12) Catalytic sensor / Infrared sensor  
Cyclopentane (C5H10) Catalytic sensor  
Dimethyl ether (C2H6O) Infrared sensor  
Ethane (C2H6) Catalytic sensor / Infrared sensor  
Ethanol (C2H6O) Catalytic sensor / Infrared sensor  
Ethyl Acetate (C4H8O2) Catalytic sensor / Infrared sensor  
Ethyl Ether ((C2H5)2O) Catalytic sensor  
Ethylene (C2H4) Catalytic sensor  
Ethylene Oxide (C2H4O) Catalytic sensor  
Heptane (C7H16) Catalytic sensor / Infrared sensor  
Hexane (C6H14) Catalytic sensor / Infrared sensor  
Hydrogen (H2) Catalytic sensor / Electrochemical sensor  
Hydrogen Cyanide (HCN) Electrochemical sensor (intrinsically safe detector)  
Hydrogen Sulphide (H2S) Electrochemical sensor  
ISO Butane (C4H10) Catalytic sensor / Infrared sensor  
ISO Butyl Alcohol ((CH3)2CHCH2OH) Catalytic sensor  
ISO Pentane (C5H12) Catalytic sensor  
ISO Propyl Alcohol (C3H8O) Catalytic sensor / Infrared sensor  
Isobutylene (C4H8) Infrared sensor  
JP8 Catalytic sensor  
LPG Catalytic sensor / Infrared sensor  
Methane (CH4) Catalytic sensor / Infrared sensor  
Methanol (CH3OH) Catalytic sensor  
Methyl Ethyl Ketone (MEK) Catalytic sensor  
Nitric Oxide (NO) Electrochemical sensor  
Nitrogen Dioxide (NO2) Electrochemical sensor (intrinsically safe detector)  
Nonane (C9H20) Catalytic sensor  
Oxygen (O2) Electrochemical sensor  
Pentane (C5H12) Catalytic sensor / Infrared sensor  
Petrol Vapours Catalytic sensor / Infrared sensor  
Propane (C3H8) Catalytic sensor / Infrared sensor  
Propyl alcohol (C3H8O) Catalytic sensor  
Propylene (C3H6) Catalytic sensor / Infrared sensor  
Styrene (C8H8) Catalytic sensor  
Sulphur Dioxide (SO2) Electrochemical sensor (intrinsically safe detector)  
Toluene (C7H8) Catalytic sensor  
Tri-Methylbenzene (C9H12) Catalytic sensor  
Vinyl Acetate (C4H6O2) Catalytic sensor  
Xylene (C8H10) Catalytic sensor  
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