GAOTek Four-In-One Portable Multi Gas Detector (Oxygen Gas: 1 to 30 % VOL)

GAOTek Four-In-One Portable Multi Gas Detector is a versatile and portable device that combines the detection capabilities for four different gases in a single unit.




GAOTek Four-In-One Portable Multi Gas Detector is a versatile and portable device that combines the detection capabilities for four different gases in a single unit. It provides accurate measurements and reliable monitoring for gases such as oxygen, carbon monoxide, hydrogen sulfide, and combustible gases. With its compact design and user-friendly interface, this detector is suitable for a wide range of applications, including industrial settings, confined spaces, and emergency response situations. GAOTek Four-In-One Portable Multi Gas Detector offers convenience and efficiency, making it an essential tool for professionals requiring comprehensive gas detection capabilities.



  • Units can be switched freely- PPm, mg / m3, Vol %, LEL %, PPHM, ppb, mg/l
  • Diffusion type- CH4, CO, O2, H2S
  • USB interface- Charging + Storage
  • Battery- 2100 mA high-capacity lithium battery, continuous working > 8 h
  • Can store 100,000 sets of data
  • Alarms- Sound Alarm, Visual Alarm, Vibration Alarm, Fault Alarm, Under-Voltage Alarm, Concentration Alarm
  • Three display interfaces- Multi, Single (OXYGEN), Real-Time Curve


Technical Specification

Gases to be detected Arbitrary combination of 1 to 4 types of gases such as toxic gases, oxygen gas, carbon dioxide, inflammable and explosive gases, TVOC, and so on. Optional configuration: temperature and humidity measurements.
Application scenarios All the cases which require the portable rapid detection of gas concentrations such as petroleum, chemical, pharmaceutical, environmental protection, combustion gas distribution, warehousing, smoke gas analysis, air governance, and so on.
Detection range 0 to 1, 10, 100, 1000, 5000, 50000, 100000 ppm, 200 mg / L, 100 % LEL, 20 %, 50 %, 100 % Vol, can be selected and other ranges can be customized.
Resolution 0.01 ppm or 0.001 ppm (0 to 10 ppm)
0.01 ppm (0 to 100 ppm)
0.1 ppm (0 to 1000 ppm)
1 ppm (0 to 10000 ppm or more)
0.01 mg / l (0 to 200 mg / l)
0.1 % LEL,
0.01 %,
0.001 % Vol
Detection principle Electrochemical, catalytic combustion, infrared, thermal conductivity, PID photoionization, and so on. depending on the type of gas, range, field environment and user demand.
Sensor service life Electrochemical principle: 2 to 3 years; Oxygen gas: 2 years or 6 years can be selected; infrared principle: 5 to 10 years;
catalytic combustion: 3 years; thermal conductivity: 5 years; PID photoionization: 2 to 3 years.
Allowable error ≤± 3 % F.S (higher precision levels can be customized)
Linearity ≤±2 % Repeatability
≤± 2 % Uncertainty
Response time 90 ≤ 30 seconds
Recovery time ≤ 30 seconds
Working environment Temperature: -40 °F to 158°F (-40 ℃ to 70 ℃)
Humidity: ≤10 % to 95% RH
Sample gas temperature -40 °F to 158 °F (-40 ℃ to 70 ℃), and the optional configuration of high-temperature sampling and cooling filter handle will be possible to detect the smoke gas at the temperature of 752 °F (400 ℃) or higher.
Temperature and humidity measurement Optional configuration: temperature at -40 °F to 158 °F (-40 ℃ to 70 ℃), accuracy level at 0.5 ℃; humidity at 0 to 100% RH, precision level at 3 % RH
Power supply 3.7V DC, 3000 mA high-capacity rechargeable polymer battery
Display mode 2.31-inch high-definition color screen
Detection mode Diffusion type measurement. The calibrated flow rate is 500 ml/minute.
Alarm mode It is possible to set as sound & light alarm, vibration alarm, sound & light + vibration alarm, turning off the alarm.
Communication interface USB (charging and communication), optional: RS485 communication interface
Data storage Standard configuration is the data storage capacity for 100, 000 entries
Protection level IP65
Explosion-proof type Intrinsically safe type
Explosion-proof mark Exia II CT4 Ga
Exterior dimensions 5.12 in* 2.68 in* 1.34 in (130 mm* 68 mm* 34 mm) (L×W×H)
Weight 0.04 lb (200g)
Standard accessories Manual, qualification certificate, warranty card, USB charger (including the data cable), belt clip, colorful packaging box (optional high-grade aluminum instrument case)
Optional items Temperature and humidity measurement function, external gas sampling pump, 1.2 m retractable sampling handle (1 to 10 meter hose, and the standard length is 1 meter), 0.4 meter stainless steel sampling handle (with dust filter, not retractable)


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