Fixed Gas Detector
| Model | ES20B |
| Weight | 1.6kg |
| Certificates | CE Rosh ATEX FCC SIL |
| Detecting Gas | EX O2 H2S CO N2 Ar CO2 etc |
| Mearsuring range | EX:0-100%LEL,O2:0-30%VOL,H2S:0-100ppm，CO:0-500ppm |
Fixed gas detector is widely used in biogas, laboratory, cesspit, Water treatment, chemical industry, laboratory, coal mine, oil mine, warehouse, tunnels,underground pipeline and other places, effectively preventing the happening of the accident.
1. Being compatible with all kinds of controlled alarms, PLC, DCS and other control system, can be remote monitored.
2. Explosion-proof design, fast, reliable and stable. Explosion-proof grade: Ex dⅡCT6
3. With self-calibration function, and three standard keys will be used to realize on-site maintenance.
4. Monitor the NH3 ammonia concentration in environment or pipeline and alarm.
5. Data display, can be connect to on/off valve.
6. Infrared ray controller can remote control alarm point settings, zero calibration, and address modification.
7. Can output one or two on-off signals, can drive ventilator or solenoid valve and other external devices.
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| Product name | Portable single gas detector | |||
| Measuring gas | O2 | CO | H2S | Combustible |
| Measuring range | 0-25%VOL | 0-500ppm | 0-100ppm | 0-100%LEL |
| More Sensor | N2 Ar H2 CL2 HCL HF CO2 SO2 NO2 SF6 etc | |||
| Measuring type | Pump suction | |||
| Response time | T90<30s | |||
| Display | LCD screen | |||
| Audible | ≥85dB at 1m | |||
| Alarm method | Visual, audible and vibrative signals | |||
| Battery | DC3.7V 2700mAh Lithium battery | |||
| Operating time | ≥8h | |||
| Data log | 100,000 events | |||
| Working temperature | Toxic gases: -20℃～50℃ Combustible: -40℃～70℃ | |||
| Working humidity | <95%RH (no condensation) | |||
| Housing | Rubber enclosure | |||
| Standard accessories | Operation manual, charger, USB cable | |||
| Dimension & weight | 200.5*64.8*35.5mm, about 460g | |||
| Ex grade | Ex ia IIC T4 Gb | |||
| Ingress protection | IP65 | |||
Color Customization To Create a Unique Appearance
Recent News
Safewill Launches 2025 Christmas Promotion — Up to 10% Off Gas Detection & Air Quality Solutions
December 09, 2025
Shenzhen, China – December 2025— As the festive season approaches, Shenzhen Safewill Co., Ltd. is delighted to announce its annual Christmas Promotion, offering customers exclusive discounts across a wide range of gas detection and environmental monitoring products. The campaign aims to support global partners, distributors, and end users with high-quality safety solutions at year-end special prices. During the promotion period, customers can enjoy up to 10% OFF
Brazilian Client Visits Factory and Purchases 10 Units of AQM
August 19, 2025
This week, our company was honored to welcome a client from Brazil to our factory. During the visit, the client learned more about our production process and product innovation, showing great confidence in our technology and quality.
Indonesian Customer Visits Factory
August 08, 2025
During the visit, our engineers worked closely with the customer’s technical team to resolve on-site technical issues, including connecting our equipment to the customer’s own system. The successful integration and smooth operation left a strong impression. As a result, the customer immediately confirmed and signed an order.
Safewill Launches Portable Pinhole‑Type Nitrogen Detector to Boost Food Packaging Safety
July 10, 2025
The Portable Pinhole‑Type Nitrogen Detector (Model ES20B), designed to revolutionize food packaging safety and quality control. This compact, pump‑suction gas detector is engineered to precisely monitor nitrogen (N₂) levels and detect residual oxygen (O₂) and carbon dioxide (CO₂) inside sealed packages—ensuring optimal freshness and shelf life.
