| Brand | Safewill |
| Model | ES20B |
| Weight | 200g |
| Certificates | CE, RoHS, ATEX, FCC, SIL |
| Detecting Gas | EX O2, H2S, CO, N2, Ar, CO2, etc. |
| Measuring range | EX: 0-100%LEL, O2: 0-30%VOL, H2S: 0-100ppm, CO: 0-500ppm |
Functional characteristics
this portable single gas detector use Aluminum alloy housing;
built-in high-performance pump, flow stability, can open may be shut;
navigation keys, user friendly interface, easy to operate;
single gas detectors switch in both Chinese and English language;
single gas detector can store 10000 groups of data;
intelligent algorithm, multi-point calibration and temperature compensation, more accurate measurement results;
2600 milliampere large capacity lithium battery, continuous work time more than 20 hours;
VOL %, %LEL, mg/m³, PPM, PPH, and different kinds of parts per unit can choose;
Acousto-optic alarm, timely alarm when the concentration exceeds the standard is detected;
Performance
Detection gas: combustible gas, toxic gas, VOC
Detection method: pump suction type
Range: see appendix
Detection principle: catalytic combustion type, electrochemical type, light ion type, thermal conductivity type, infrared NDIR type
Accuracy: ±3% F.S. Reduplication: ±2%
Response time: T90 < 30S (different gas sensors have different response times)
Alarm mode: sound and light alarm, two-color LED alarm light, voice ≥ 75dB@25cm³
Single gas detector Electrical characteristics
Power supply: lithium battery, nominal voltage: 3.7VDC, capacity: 2600 mA
Charging time: ≤6 hours
Battery life: ≥12 hours (normal temperature electrochemical sensor)
Structural features
Main material: aluminum alloy
Weight: about 0.46kg
Size: 200.5*64.8*35.5mm (L*W*H)
Electrical service environment
Temperature range: -20℃ ~ +50℃ (special requirements need to be customized)
Humidity range: 10 ~ 95%RH (no condensation)
Pressure range: 86 ~ 106kPa
Contact Us for a Quote Today
For more details about our products, pricing, and shipping information, feel free to reach out. We look forward to providing you with the best service possible!
| 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.
