Gas leak detectors, analyzers, alarm devices and calibration gas
SKU# (5981)


$843.90     Availability: 3 Days
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CTI GG-SO2-EXP Explosion Proof Electrochemical Gas Sensor for Sulfur Dioxide (SO2) 0-20 ppm. 4-20 mA output, 24VDC power supply. Explosion Proof Copper-free aluminum enclosure for Class l, Div 1 & 2, Groups B, C & D. CSA, UL, FM, ATEX and IECEx approved.

Part# with Options:        GG-SO2-20-EXP
Price with Options:        843.90


Relay Output
(1) Fail-Safe Relay Output for Calibration Technologies GasGuard Detectors
RM420 Relay Output

  Availability 3 Days  ]

Key Features
  • Explosion-proof enclosure for classified areas
  • Sulfur dioxide selective electrochemical sensor technology
  • 0-20 ppm factory range
  • Electronics potted to eliminate internal corrosion
  • Industry standard 24VDC, linear 4-20 mA output
  • Operating temperature from -4°F to +122°F
  • Accurately monitor SO2 levels for personnel protection
  • No false alarms from interference gases
  • Real-time continuous monitoring for early leak detection

The GG-SO2-EXP is designed for detection of sulfur dioxide gas in hazardous areas. The standard detection range of 0-20 ppm provides real-time continuous monitoring of concentrations accurately down to 1 ppm with no false alarms.

The GG-SO2-EXP utilizes a proven sulfur dioxide specifc electrochemical sensor for detecting toxic SO2 gas concentrations. No false alarms due to cross-sensitivities from other gases, and no false alarms from temperature or humidity fluctuations.

The GG-SO2-EXP provides an industry standard linear 4/20 mA output signal proportional to ppm concentration of sulfur dioxide. Long sensor life with minimal span adjustment can be expected in most applications. The sensor is designed for simple calibration and the sensor head is easily field replaceable.

  • Wineries
  • Perimeter Monitoring
  • Refineries
  • Wastewater
  • Heat Treatment
  • Process manufacturing
  • Refrigeration systems
  • Air quality
  • Textiles
  • Low cost explosion protection
  • No false alarms from interference gases
  • Simple operation & calibration

Sulfur dioxide gas is twice as heavy as air and will tend to accumulate in lowlying areas in poorly ventilated rooms. For optimum personnel protection (representative concentration reading that an employee would be exposed to), mount the sensor at a height in the breathing zone of the employees. It would typically be no higher than 4 to 5 feet off the ground, which also allows easy access. As a general rule of thumb, try to mount sensors within 30 feet of potential SO2 sources.

The GG-SO2-EXP is useful for horn/ strobe and ventilation activation, and is also useful for alarm outputs such as phone dialers and other alarm functions.

Typical sensor element life is 3 years, with minimal cross-sensitivity to other gases. Field replaceable sensor element keeps long term maintenance simple and low cost. Every circuit board is potted to completely eliminate corrosion to the electronic components and copper tracing on the circuit board. An explosion-proof aluminum enclosure houses the transmitter.

Input Power:+24 VDC, 50 mA
Detection Principle:Electrochemical
Detection Method:Diffusion
Gases:Sulfur Dioxide (SO2)
Range:0-20 ppm
Output Signal:Linear 4/20 mA (max input impedance: 700 Ohms)
Linearity:+/- 0.5% of full-scale
Repeatability:+/- 1% of full-scale
Response Time:T50 = less than 20 seconds
T90 = less than 45 seconds
Accuracy:+/- 5% of full-scale
Zero Drift:Less than 0.1% of full-scale per month, non-cumulative
Span Drift:Application dependent, but generally less than 3% per month
Temperature Range:-4°F to +122°F (-20°C to +50°C)
Humidity Range:5% to 95% non-condensing
Wiring Connections:3 conductor, shielded, stranded, 20 AWG cable (General Cable C2525A or equivalent) up to 1500 ft
Terminal Block Plugs: (Field Wiring)26-12 AWG, torque 4 lbs-in
Weight:3.75 lbs
Dimensions:6.75” high x 5.25” wide x 4.5” deep
Enclosure:Copper-free aluminum body, epoxy powder coat finish, neoprene gasket, for hazardous areas.
Class I, Division 1 & 2, Groups B, C, D
Class II, Division 1, Groups E, F, G
Class II, Division 2, Groups F, G
Class III
NEMA/EEMAC: 3, 4, 4X, 7BCD, 9EFG
UL Standard: 1203
CSA Standard: C22.2 No. 30
FM Classification No.: 3615
ATEX Certificate KEMA 02 ATEX 2265U
IEC Standards EN:60079-0, EN:60079-1, EN:60529
Warranty:2 years (including sensor element)
Export Info
Made inUnited States
Harmonized Tariff Code (HTC)9027102000

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> GAS DETECTORS > SULFUR DIOXIDE :    33 Items found.

DRAEGER  8328273

Draeger Pac 6000 Disposable Personal Single-Gas Detector for Sulfur Dioxide (SO2) 0-100 ppm. Includes 360° alarm signal, large display, data and event logger, battery and a replaceable filter membrane for water and dust protection. IP68. Two year lifetime. CSA, IECEx, ATEX and CE approvals.



BW Clip portable gas detector 2 year maintenance free for Sulfur Dioxide SO2. Configurables Low and high alarm (ppm). UL approved for Class I Div 1. ATEX, CE, EC and IECEx approved.



MPOWER  M001-0007-000

mPower UNI MP100 Portable Single Gas Detector for detection of Sulfur Dioxide (SO2) 0-20ppm. Includes large LCD display, 6 Bright Red Flashing LED, Vibrating and 90dB Audible Alarm Port. IP67, Event Logger, UL approval for Class I Div 1.



BW Clip Real Time portable gas detector with 2 year maintenance free for Sulfur Dioxide (SO2). Configurables Low and high alarm (ppm). One-button operation. Designed for harsh environments and extreme temperatures. Includes a real-time gas level display. IP66 / IP67. UL approved for Class I Div 1. ATEX, CE, EAC Ex and IECEx approved.




Industrial Scientific Tango TX1 Gas Detector for Sulfur Dioxide (SO2) 1-150 ppm. DualSense® Technology. 2-year run time. Includes LCD Display and 100dB audible alarm. Polycarbonate enclosure. IP66 & IP67. ATEX, CSA, IECEx, UL & INMETRO Approvals.




Honeywell BW Solo Serviceable Single-gas Detector for Sulfur Dioxide (SO2) 0-100 ppm. Small and lightweight. One button operation. Visual, vibrating and audible alarms. Optional wireless version. IP66/68. ATEX, IECEx and CSA approvals for Class I Div 1.



MSA  10154077

MSA ALTAIR 2X Portable Single Gas Detector with XCell Sensor Technology for Sulfur Dioxide (SO2) Range 0-20 ppm. Low Alarm 2ppm, High Alarm 5ppm. Polycarbonate Housing. 25 feet drop test. 95dB audible alarm. Monochrome LCD Display. IP67. cCSAus, ATEX and IEC Approved.




BW GasAlertExtreme Portable detector with gas concentration readout for Sulfur dioxide (SO2) 0-100 ppm.



RAE  G02-B310-100

ToxiRAE Pro PGM-1860 Personal Portable Monitor For Sulfur Dioxide (SO2) 0-20 ppm with replaceable sensor, filter and Li-ion battety. Automatic bumb testing and calibration with AutoRAE 2 (optional). Includes Datalogging, Graphical LCD display, 2 buttons for operation and programming. CSA, ATEX, IECEx and China Ex Approved. IP-65. Wireless-capable option.




Honeywell Zareba Sensepoint Gas Detector Transmitter for Sulfure Dioxide (SO2) 0-15ppm complete with pre-wired universal junction box (1 threaded M20, 1 clearance 3/4"NPT, 1 clearance 1/2" NPT, 3 approved stopping plugs, earth continuity plate) and factory set toxic gas sensor. 2 wire 4-20mA loop output. ATEX Approved. (Optional ranges: 0-15 ppm, 0-50 ppm)



DRAEGER  8318976

Draeger Pac 7000 small single gas detector for Sulfur Dioxide (SO2) 0-100 ppm for personal monitoring. TWA and STEL alarms. IP65. CE, ATEX, UL, IECEx, MED and ATEX Approvals. Class I, II Div 1.



CTI GG-SO2 Electrochemical Gas Sensor for Sulfur Dioxide (SO2) 0-20 ppm. 4-20 mA output, 24VDC power supply. NEMA 3RX polycarbonate housing. CSA and UL approved.



HONEYWELL  2106B1420

Honeywell Sieger Sensepoint Gas Detector Transmitter for Sulfur Dioxide (SO2) (0-15 to 0-50 ppm) ppm with Surecell Toxic Sensor. 2 wire 4-20mA loop output. ATEX/IECEx Certified.



DELPHIAN  364-455-01-365-771-11

Delphian GazTell Fixed Point Electrochemical Gas Detector for Sulfur Dioxide (SO2) 0-20 ppm. 4-20mA Output. Optional Modbus RTU Output and Alarm Relays. SIL2 Approval. Suitable for Class I Div 1 & 2 Groups C, D.



GDS  GDS-49-1-19-05

GDS GDS-49 Remote Gas Detector Transmitter with Stainless steel sensor head configured for Sulfur Dioxide (SO2) with range 0-50 to 0-500 ppm. 2-Wire 4-20 mA transmitter.




Honeywell Sensepoint XCD RTD Gas Detector for Sulfur Dioxide (SO2) with Remote Electrochemical Sensor. Aluminium alloy LM25 or 316 stainless steel housing, PPS sensor head. IP67. 3-wire 24 VDC power. Includes 3 programmable alarm relays and 4-20mA output (sink or source selectable), Modbus RTU option available. User-Selectable full scale range 0 to 15 ppm. UL/cCSAus Approved for Class I Div 2.




Honeywell Series 3000 MkII Gas Detector Transmitter, with aluminum housing (optional stainless steel) for monitoring SULFUR DIOXIDE (SO2) with electrochemical sensor, 2-wire 4-20mA loop, 0-15.0 ppm (5.0 to 20.0 ppm, 5.0 ppm)



DETCON  961-550026-020G

Detcon DM-100-SO2 Electrochemical Sulfur Dioxide (SO2) 0-20ppm/0-100ppm Sensor Assembly with loop powered display. 4-20 mA. Features intelligent electronices, non-intrusive operator interface and comprehensive fault diagnostics. 316 Stainless Steel Housing with 3/4" NPT thread. XP-instrinsically safe. Class I, Div. 1, Groups A, B, C, & D.



Oldham iTrans 2 Fixed Gas Detector with electrochemical smart sensor for Sulfur Dioxide (SO2) 0.2-99.9 ppm. 4-20mA optional RS-485 Modbus/HART and 3 alarm relay outputs. Explosion-proof NEMA 4X Enclosure. IP66. CSA, ATEX and IECEx Approvals.


GDS  GM/EC-01-19-05

GDS GASMAX/EC 2-Wire Gas Detector with local stainless steel sensor head explosion proof (XP) configured for Sulfur Dioxide (SO2) with range 0-50 to 0-500 ppm, 4-20 mA output transmitter.


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