SG100-X 2-Wire Fixed Oxygen Gas Detector with 0–25%VOL Range Ex Db IIC T6 Gb and IP66/IP67 Protection

A cost-effective, IECEx/ATEX certified 2-wire fixed gas detector for continuous monitoring of oxygen (O₂) from 0–25%VOL with 0.1%VOL resolution. Features IP66/IP67 water/dust resistance, intelligent plug-and-play sensor module, 2-wire 4-20mA analog output, and magnetic wand for non-intrusive configuration. No display version – ideal for integration into existing control systems. Easy one-person installation (only 1.0 kg) with mounting bracket included.

The SG100-X is a cost-effective, intrinsically safe fixed gas detector from the SG100 series, designed for continuous 24/7 monitoring of toxic gases and oxygen. Taking oxygen (O₂) as an example, it uses an electrochemical sensor to measure concentrations from 0–25%VOL with a resolution of 0.1%VOL. Accuracy is ≤ ±2–5% FS (depending on the specific sensor).

The detector is IECEx and ATEX certified with explosion-proof grades Ex db IIC T6 Gb and Ex db ia IIC T6 Gb, making it suitable for hazardous areas (Zone 1 and Zone 2). It features IP66/IP67 water and dust resistance, ensuring reliable operation in harsh environments.

The SG100-X uses a 2-wire 4-20mA analog output – ideal for integration into existing control systems (PLC, DCS, SCADA) where only two wires are available for both power and signal. This simplifies wiring and reduces installation costs, especially in retrofit applications.

A key feature is the intelligent plug-and-play sensor module – calibration can be performed by simply replacing the sensor module without disassembling the whole unit. The detector is configured via a magnetic wand (non-intrusive), allowing safe menu navigation in explosion areas without opening the enclosure. It comes with a standard mounting bracket and weighs only 1.0 kg, making one-person installation quick and easy.

Note: This version has no display – all configuration and status checking is done via the magnetic wand and 4-20mA signal monitoring.

Oxygen is essential for life, but both oxygen deficiency and oxygen enrichment pose serious risks in industrial environments.

• Confined spaces – Tanks, pipelines, sewers, silos, vaults (oxygen displaced by other gases)
• Inert gas purging – Nitrogen, argon, or CO₂ used to purge vessels can displace oxygen
• Chemical reactions – Oxidation processes consume oxygen
• Leaks from oxygen cylinders or lines – Can cause localized oxygen enrichment
• Fermentation and biological processes – Consume oxygen and produce CO₂ or methane
• Welding and cutting – Can consume oxygen in enclosed areas

• Confined space entry – Pre-entry and continuous monitoring in tanks, manholes, and ductwork
• Oil & gas refineries – Process areas, storage tanks, and pipeline pigging stations
• Chemical plants – Reactors, mixing vessels, and storage areas
• Wastewater treatment plants – Digesters, headworks, and lift stations
• Mining – Underground mines, tunnels, and ore pass chutes
• Food & beverage – Nitrogen-purged packaging lines, cold storage, and fermentation rooms
• Pharmaceutical manufacturing – Cleanrooms, incubators, and biological safety cabinets
• Laboratories – Fume hoods, glove boxes, and animal housing areas
• Power generation – Boiler rooms, turbine enclosures, and coal handling areas
• Marine & shipbuilding – Cargo holds, ballast tanks, and engine rooms

• 2-wire 4-20mA output – Simplifies wiring; power and signal on same two wires – ideal for retrofits and remote locations.
• IECEx/ATEX certified – Ex db IIC T6 Gb and Ex db ia IIC T6 Gb for hazardous areas (Zone 1, Zone 2).
• IP66/IP67 protection – Waterproof and dustproof for outdoor and wash-down environments.
• Intelligent plug-and-play sensor module – Easy field replacement and calibration without disassembling the whole detector.
• Magnetic wand operation – Non-intrusive configuration and menu navigation in explosion areas – no need to open the enclosure.
• One-person calibration – Easily performed using calibration cap.
• Lightweight and easy to install – Only 1.0 kg with standard mounting bracket.
• Module chamber design – No need to return the whole unit for calibration; just replace the sensor module.
• No display – Ideal for integration into existing control systems where local display is not required.
• Multiple cable entry options – Standard M20 × 1.5 with optional NPT, G3/4, G1/2 threads.

The SG100-X fixed oxygen detector is widely used to prevent oxygen deficiency and enrichment hazards in the following environments:

1. Confined Space Entry

   Tanks, silos, pipelines, sewers, manholes, and vaults

   Continuous monitoring before and during personnel entry

   Alarm when O₂ falls below 19.5% or rises above 23.5% VOL

2. Oil & Gas Refineries and Petrochemical Plants

   Process areas, storage tanks, catalyst handling, pipeline pigging stations

   Detect oxygen displacement by hydrocarbons or inert gases

   Prevent fire/explosion from oxygen enrichment

3. Chemical Manufacturing

   Reactors, mixing vessels, solvent storage, and distillation columns

   Monitor oxygen levels where inert gas purging is used

   Protect workers and prevent oxidation reactions

4. Wastewater Treatment Plants

   Digesters, headworks, lift stations, sludge holding tanks

   Methane and CO₂ produced during digestion displace oxygen

   Protect workers during inspection and maintenance

5. Underground Mining & Tunneling

   Coal mines, hard rock mines, tunnel boring operations

   Oxygen consumed by diesel equipment, blasting, or oxidation of ores

   Continuous monitoring along ventilation airways and working faces

6. Food & Beverage Industry

   Nitrogen-purged packaging lines, cold storage rooms, fermentation vessels

   Detect oxygen deficiency in enclosed spaces

   Ensure worker safety in breweries, dairies, and meat processing plants

Shenzhen YuanTe Technology Co., Ltd. (brand: Safegas) was established in 2010 and specializes in the R&D, manufacturing, and sales of gas detection equipment and integrated systems. With over 16 years of industry expertise, the company serves sectors including oil & gas, chemicals, environmental protection, electronics, municipal engineering, agriculture, and household appliances. Their product portfolio includes portable gas detectors, fixed gas transmitters, gas analyzers, control panels, and calibration accessories. All products are manufactured under ISO9001 and ISO45001 management systems, holding international certifications such as IECEx, ATEX, and EMC. With an annual production capacity of over 80,000 units, YuanTe Technology supplies gas detection solutions to customers worldwide.

• International certifications – IECEx and ATEX Ex db IIC T6 Gb / Ex db ia IIC T6 Gb, IP66/IP67.
• 2-wire simplicity – Reduces wiring costs; ideal for retrofitting existing systems.
• Cost-effective fixed detection – High performance at competitive pricing.
• Plug-and-play sensor module – Easy field replacement and calibration without disassembling the detector.
• Magnetic wand operation – Safe, non-intrusive configuration in hazardous areas.
• No display version – Perfect for integration into centralized control systems.
• Lightweight and easy to install – Only 1.0 kg with standard mounting bracket; one-person installation.
• Rugged construction – IP66/IP67, die-cast aluminum housing.
• Multiple cable entry options – M20, NPT, G3/4, G1/2 threads available.
• Global support – 24/7 customer service and fast delivery