Portable Oxygen (O2) Gas Detector

$478.15

| 3 review(s) | Add your review

Safe portable O2 Oxygen detector is ideal for monitoring Oxygen gas concentrations in the range of 0 to 30% VOL or 0 to 100% VOL. With features such as audible, visual and vibration alarms, a large-capacity battery that extends the operating time, and user-friendly setup and operation, this compact handheld Oxygen level detector is widely used in laboratories, research institutions, and confined spaces.

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Delivery date: 3-10 days

SKU: GD200-O2

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DESCRIPTION
SPECIFICATIONS
DOCUMENTS

Gas Detector for O₂ Monitoring

GasDog portable O₂ single gas detector monitors Oxygen gas concentrations quickly and accurately, ideal for labs, research, and confined spaces.

Basic Parameters:

Model: GD200-O2
Sampling Method: Pumping Suction
Gas: Oxygen (O₂)
Range: 0 to 25% VOL/30% VOL/100% VOL
Resolution: 0.01% VOL
Accuracy: ≤±3% F.S.
Explosion-proof Grade: Ⅱ 2G Ex ia Ⅱ CT4 Ga
Certification: CE, ATEX
Warranty: 12 months

Oxygen Detector

Features

Aluminium Alloy Case

Equipped with a Waterproof Aluminum Alloy Suitcase

Zero Calibration

Self-Calibration and Zero Calibration for Accurate Detection

USB Data Transfer

USB Interface to Transfer Data and Charge at High Speed

Rechargeable Battery

3.7V Rechargeable Lithium Polymer Battery with a Large Capacity

Why Choose

Our Gas Detector?

Portable Single Gas Detector

- Safe Oxygen Level Detector

✔️ Built-in internal sampling pump, 10 grades of suction are available.
✔️ Two-stage alarm with sound & light, and alarm point is settable.
✔️ GasDog Oxygen (O2) gas detector adopts a high-accuracy gas sensor with a fast response.
✔️ LCD directly reads out the Oxygen, unit, concentration, local time, etc.
✔️ Gas concentration units mg/m³ and ppm can be shifted by one press.
✔️ Handheld and small design, easy to carry, can be put in a pocket.
✔️ High-intensity ABS engineering plastics housing, suitable for different kinds of situations.

More Info.

Applications

Portable gas detector for agricultural & environmental protection

Agricultural Protection

Livestock Farms

Petrochemical & Chemical Industry

Sewage Treatment Plant

Gas Detection Q&A - For Your Safety Environments

Built-in advanced gas detector sensor and sound & light alarm to ensure precise and safe gas detection in hazardous applications.

Q: Can an Oxygen gas detector used for confined space?

A: Yes, an Oxygen gas detector can be used for confined spaces. GasDog gas detectors and monitors are valuable tools in ensuring the safety of individuals working in such environments. Confined spaces often present a heightened risk of Oxygen deficiency, making it crucial to have reliable gas detectors in place.

GasDog Oxygen O2 gas detectors are specifically designed to monitor oxygen levels within confined spaces, providing real-time data on the Oxygen concentration. When these detectors detect a drop in oxygen levels below safe thresholds, they trigger alarms, alerting workers to the hazardous condition. This early warning system is critical in preventing asphyxiation and ensuring the immediate evacuation of the confined space.

Model	GD200-O2
Sampling Method	Pumping suction, flow rate can be up to 750ml/min
Detection Principle	Electrochemistry
Gas	Oxygen (O2)
Range (Optional)*	0 to 25% VOL, 0 to 30% VOL, 0 to 100% VOL
Resolution	0.01% VOL
Accuracy	≤±3% F.S.
Response Time	≤10s
Repeatability	≤±1%
Recovery Time	≤10s
Linearity Error	≤±1%
Zero Shift	≤±1% (F.S./year)
Data Logging (Optional Function)	High speed data transmission by USB, available for data downloading and printing (The built-in IC card has about 2G memory, which can record 100,000 sets of data.)
Alarms	Sound, light and vibration
Display	LCD dot matrix display
Language	Chinese/English
Battery	3.7V rechargeable lithium battery, 3.7 Watt (Charger included: Input AC 100-240V 50/60Hz with optional USA, Europe or UK plug)
Operating Time	100h (Pump off)
Communication	Mini USB interface supports standard MODBUS communication protocol
Explosion-proof Grade	Ⅱ 2G Ex ia Ⅱ CT4 Ga
Case Material	ABS+PC
Protection Grade	IP66
Certification	CE, ATEX (Standard: EN IEC 60079-0:2018, EN 60079-1:2014)
Operating Temperature	-20℃~50℃
Operating Humidity	0~95%RH (non-condensing)
Operating Pressure	0.8~1.2bar
Dimension	2057532mm
Weight	300g
Warranty	12 months
Extension Probe	About 480mm (Total Length), About 300mm (Probe Head)
Accessories (Optional)	Calibration kit - gas pressure regulator (calibration gas cylinder NOT included) Body Material: Brass Max. Input Pressure: ≤15MPa Max. Output Pressure: 0.25MPa Flowmeter Range: 0.1-1.5 L/min Mounting Connection: Inlet port: W21.8-14; Outlet port: Ф6 flexible tube

Note:

If you need an O2 gas detector with other measuring ranges unlisted in the above table, please contact us to inform your operating environment, so as to help you choose an appropriate one for your application.
We also provide other common gas detectors, and you can refer to GasDog Gas Detector Catalog to get the specific gas type and measurement range. If you have any questions, please feel free to contact us.

Gas Detector Data Downloading Operation Instruction

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GasDog Portable Gas Detector DataExport Software

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EXISTING REVIEWS

Good gas detector

The first impression of holding it is that it is small and lightweight, not much bigger than my palm, and there is no burden to carry it in my work bag. The operation is also simple, just take a glance at the manual and you will be able to use it. With one click power on, the oxygen concentration value and battery level on the screen are clear at a glance, and the changes in values can be seen clearly.

From: Corey | Date: 4/30/2026 8:07 AM

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Nice and Easy to Use

Very good portable oxygen gas detector. The detector is compact, lightweight, and easy to carry. The display is clear and the readings respond quickly. It works well for checking oxygen levels in confined spaces. The alarm is loud and reliable, which gives extra safety during work.

From: Samo | Date: 3/6/2026 7:42 AM

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Good detection performance.

The power-on self-test process is fast and the readings are stable. In actual measurements, even in poorly ventilated spaces, the device promptly alarms when oxygen concentration drops. The loud and effective warning is highly effective, making it virtually impossible to miss a call.

From: Enres | Date: 9/5/2025 6:07 AM

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Portable Oxygen (O2) Gas Detector

Gas Detector for O2 Monitoring

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Gas Detection Q&A - For Your Safety Environments

Q: Can an Oxygen gas detector used for confined space?

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