| 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
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.
Safewill Launches Popular Handheld Dust Monitor ES80A-PDM for Flexible Air Quality Monitoring
June 28, 2025
Safewill, a leading manufacturer and supplier of gas detectors and air quality monitoring systems, has introduced its handheld dust monitor ES80A-PDM, gaining significant popularity in both domestic and international markets.
June 18, 2025
Safewill is proud to announce its participation in the Emergency Disaster Reduction and Rescue (EDRR) Expo 2025, one of Southeast Asia’s leading events focused on disaster preparedness, emergency response, and safety technologies. The exhibition will be held from August 13 to 15, 2025, at the Jakarta International Expo, with Safewill located at Hall A2, Booth H26.
Ghana Client Adopts Customized Outdoor Air Quality Monitoring System with Rainfall Module
June 12, 2025
In a new step toward global environmental monitoring cooperation, a customized Outdoor Air Quality Monitoring System—based on Safewill’s advanced solution for multi-parameter pollution tracking—has been successfully delivered to a client in Ghana. This solution integrates NO₂, SO₂, CO, O₃, VOC, PM2.5, PM10, TSP, and meteorological sensors, and has been specially upgraded with a rainfall monitoring module to meet local environmental research needs.
