SG100-S Corrosion-Resistant H2 Detector with 316 Stainless Steel and Electrochemical Sensor

Advanced hydrogen gas detection system featuring 316 stainless steel construction for superior corrosion resistance. This electrochemical detector is rated IP66/IP68 for harsh environments and offers optional relays and wireless connectivity.

The SG100-S is a cost-effective, IECEx/ATEX certified fixed gas detector from the SG100 series, designed for continuous monitoring of toxic gases, oxygen, flammable gases and VOC. It offers both 2-wire and 3-wire 4-20mA analog output, RS485 Modbus, and optional HART output, making it compatible with most control systems (PLC, DCS, SCADA). Optional wireless data transmission (LoRa/4G) allows remote data review and download.

For hydrogen (H₂) monitoring, the SG100-S uses an electrochemical sensor with selectable measuring ranges of 0–1000 ppm, 0–2000 ppm or 0–5000 ppm and a resolution of 1 ppm. Accuracy is ≤ ±2-5% FS (sensor dependent).

Hydrogen is a colourless, odourless, highly flammable gas. It is widely used in petroleum refining, chemical production (ammonia, methanol), semiconductor manufacturing, and as a clean energy carrier in fuel cells. The gas has a wide explosive range (4-75% VOL in air) and is difficult to detect by human senses, making continuous monitoring essential for safety. Hydrogen also displaces oxygen in confined spaces, posing an asphyxiation hazard. Reliable hydrogen detection is critical in refineries, chemical plants, battery rooms, and hydrogen production/storage facilities.

Unlike standard SG100 models with die-cast aluminium housing, the SG100-S is built with 316 stainless steel casing (S316) as the default material – aluminium is only available as an option.

This stainless steel construction provides:

• Superior corrosion resistance – Withstands harsh chemical environments, coastal areas and high-humidity conditions where aluminium may corrode over time.
• Enhanced durability – Resistant to mechanical impact and physical damage in rugged industrial settings.
• Longer service life – Reduces maintenance frequency and replacement costs in demanding applications.
• Suitable for aggressive environments – Ideal for offshore platforms, chemical plants, wastewater treatment, and food processing facilities where frequent washdowns and chemical exposure are common.

• 316 stainless steel casing – Corrosion-resistant, durable, suitable for harsh and aggressive environments.
• Electrochemical sensor for H₂ – Ranges 0-1000/2000/5000ppm, resolution 1ppm.
• Flexible outputs – 2-wire or 3-wire 4-20mA, RS485 Modbus, optional HART.
• Optional 3 relays – Low/high/fault alarm relay for external device control.
• Optional wireless – LoRa or 4G for remote data access.
• Plug-and-play sensor module – Easy replacement, calibration via PC software.
• Non-intrusive configuration – Magnetic wand + remote control (safe for hazardous areas).
• Rugged & protected – IP66/IP68, stainless steel housing, splash guard included.
• Compact & lightweight – 1.0 kg, comes with mounting bracket.
• Certified safe – IECEx/ATEX Ex db IIC T6 Gb, Ex db ia IIC T6 Gb.

• Petroleum refineries – Hydrogen monitoring in hydrocracking, catalytic reforming.
• Chemical plants – Ammonia and methanol synthesis, hydrogenation processes.
• Semiconductor manufacturing – Hydrogen used in epitaxial deposition and annealing.
• Battery rooms – Hydrogen from lead-acid battery charging (ventilation monitoring).
• Hydrogen fuel cell facilities – Leak detection in production, storage and dispensing areas.
• Power plants – Hydrogen-cooled generator monitoring.
• Food processing – Hydrogenation of vegetable oils.

• 1. What is the accuracy of the SG100-S for H₂ detection?
  ≤ ±2-5% FS (depending on the specific sensor).

• 2. What output signals are available?
  Standard: 4-20mA (3-wires), RS485 Modbus, 1-5V. Optional: HART.

• 3. Does it have wireless capability?
  Yes – optional LoRa or 4G for remote data transmission.

• 4. Can I add relay outputs?
  Yes – optional 3 relays (low/high/fault alarm relay).

• 5. What is the protection rating?
  IP66/IP68 – waterproof, dustproof and submersible.

• 6. What is the explosion-proof grade?
  Ex db IIC T6 Gb / Ex db ia IIC T6 Gb (IECEx/ATEX).

• 7. How do I configure the detector in a hazardous area?
  Use the magnetic wand or remote control – no need to open the enclosure.

• 8. How do I calibrate the sensor?
  The plug-and-play sensor module supports calibration via Safegas PC software.

• 9. What is the casing material?
  316 Stainless Steel as standard. Die-cast aluminum is available as an option.

• 10. What is the warranty period?
  1 year.

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. 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.

• Established since 2010 – Over 16 years of experience in gas detection R&D and manufacturing.
• Full product range – Portable detectors, fixed transmitters, analyzers, control panels, accessories.
• International certifications – IECEx, ATEX, EMC certified for hazardous areas.
• Wide gas & industry coverage – Hundreds of gases; serve oil & gas, chemical, mining, environmental, food, pharma, and more.
• Strong R&D & quality – ISO9001 & ISO45001 certified; professional R&D team and global service network.
• High production capacity – Over 80,000 units per year with fast delivery (5–7 working days typical).
• Global customer support – 24/7 after-sales service and solutions tailored to diverse industries.