GAOTek Portable Nitrogen Dioxide (NO2) Gas Detector with Pump

GAOTek  portable nitrogen dioxide gas detector is used for portable and fast detection of the concentration of nitrogen dioxide gas, temperature and humidity measurement (optional), and alarms for exceeding standards.

GAOTek -NDGD-110



GAOTek  portable nitrogen dioxide gas detector is used for portable and fast detection of the concentration of nitrogen dioxide gas, temperature and humidity measurement (optional), and alarms for exceeding standards. The 3.5-inch high-definition color screen is used to display the concentration in real time and imported brand gas sensors. The main detection principles consist of electrochemistry, infrared, catalytic combustion, & thermal conductivity. It can detect the gas concentration in the pipeline or in the confined space and the atmospheric environment. It can detect the gas leakage or the purity of a single high-concentration gas with nitrogen or oxygen as the background gas. It can detect more than 500 types of gases.



  • Waterproof, dustproof, explosion-proof, shockproof, intrinsically safe circuit design, anti-static and anti-electromagnetic interference
  • Protection level IP66, corresponding accessories can be selected for use in high humidity and high dust occasions
  • Built-in pump-suction measurement, quick response, sampling distance greater than 10 meters, special gas path design and optional related accessories can detect positive
  • The high-definition color screen displays real-time concentration, alarm, time, temperature, humidity and storage
  • Large capacity data storage function, larger capacity can be customized
  • Standard USB interface, optional
  • USB charging port, can be charged by computer or power bank, compatible with mobile phone charger and overcharge
  • Using 5400 mAh × 2 large-capacity rechargeable polymer battery, which can work continuously for a long time
  • Sound and light alarm, visual alarm, under-voltage alarm, fault alarm, multi-directional three-dimensional display of alarm status when alarming
  • The alarm value can be set, and the alarm mode can be low alarm, high alarm, interval alarm, weighted average alarm
  • High-precision temperature and humidity measurement (optional), while temperature compensation is performed on the sensor
  • The minimum can detect 0.001 PPM, the maximum can detect 99.999 % Vol, and support automatic switching of high and low ranges (please specify when ordering).
  • Real-time detection or timing detection is possible (for the case where the amount of the gas to be measured is relatively small), the pump can be turned off when not detecting to extend the startup time
  • It can be selected to detect 1 to 6 kinds of gases at the same time, up to 18 kinds, and the units can be switched freely
  • Three display modes can be switched
  • Data recovery function, selective recovery or full recovery, automatic identification and prevention of mis operation of concentration calibration
  • Zero-point automatic tracking, multi-level calibration of target points, to ensure the linearity and accuracy of measurement
  • Can record calibration log, troubleshooting countermeasures, reminder of the expiration of sensor life, reminder of next concentration calibration time


Technical Specifications

Detection gas The nitrogen dioxide (NO2) gas
Measuring range 0 to 1 ppm, 0 to 10 ppm, 0 to 100 ppm, 0 to 500 ppm, 0 to 1000 ppm, 0 to 2000 ppm, 0 to 5000 ppm, 0 to 10000 ppm, 0 to 50000 ppm 0 to 100 % LEL 0 to 5 % Vol, 0 to 20 % Vol, 0 to 30 % Vol, 0 to 50 % Vol, 0 to 100 % Vol (Optional)
Resolution 0.001 ppm (0 to 10 ppm) High accuracy
0.01 ppm (0 to 10 ppm)
0.01 ppm (0 to 100 ppm)
0.01 % Vol; 0.001 % Vol
Working principle Electrochemical, infrared, catalytic combustion, thermal conductivity, semiconductor, PID, etc.
Depends on measuring range, field environment and customer requirements.
Sampling method Built-in pump suction
Display 3.5 in (88.9 mm) HD color screen
Accuracy ≤ ± 2 % F.S. (Customizable with higher accuracy)
Linearity ≤ ± 2 %
Repeatability ≤ ± 2 %
Alarm Sound and light alarm
Response time ≤ 20 s (T 90)
Recovery time ≤ 30 s
Unit switch The unit can be switched freely. Normal gas does not need to input molecular weight. Special gas needs to input molecular weight
to automatically calculate and switch.
Units for optional ppm, mg/m3, Vol %, LEL %, ppb, mg/L
Power supply High-capacity rechargeable polymer battery 3.7 VDC, 5400 mAh × 2
Working environment Temperature: -40 °F to 158 °F (-40 ℃ to +70 ℃)
Humidity: ≤ 10 to 95 % RH (no condensation)
Data storage Large-capacity data storage, supports expansion
Communication interface USB (charging and communication), with charging protection function, support USB hot plug
Interface language English
Explosion-proof Intrinsically safe ExiaⅡCT4Ga    Explosion-proof certificate No.:CnEx16.3091
Protection IP66
Standard accessories Manual, certificate, warranty card, USB charger (including data cable), high-grade aluminum alloy instrument case, back clip,
humidity and dust filter, 0.4-meter stainless steel sampling handle
Optional accessories Filter tip: filter water vapor and dust, change regularly according to the site environment
Imported high temperature sampling handle sample gas)
Optional functions RS 485 signal output, integrated built-in printer, external wireless Bluetooth printer, one-key SOS call, wind speed detection,
pressure difference detection
Application Petroleum, chemical, pharmaceutical, environmental protection, flue gas analysis, air treatment, etc.
Environmental temperature and humidity detection temperature -40 °F to 158 °F (-40 ℃ to +70 ℃), accuracy 32.9 °F (0.5 ℃); humidity 0 to 100 % RH, accuracy 3 % RH
Wireless data transmission: Rola module, Bluetooth module, Wi-Fi module, 443 M module, Zig-Bee module (free computer software/cloud
platform/mobile APP remote monitoring data)
Storage function optional 16 G or larger capacity SD card storage
Dimensions 10.03 in × 8.26 in × 4.92 in (255 mm × 210 mm × 125 mm)
Weight 7.05 lb (3.2kg)


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