DM68A Portable Oxygen O2 Gas Analyzer with Temperature & Humidity | Audible Alarm | Rechargeable

Oxygen Indicator Information

The supplied specifications list the following oxygen-level indicators:

Green – Good: Above 18.0% Vol

Yellow – Slight: 18.1% to 10.0% Vol

Red – Serious: 10.1% to 0% Vol

Note: The supplied indicator ranges overlap and are not presented in a consistent order. Confirm the exact alarm thresholds and indicator ranges in the product manual before relying on them for safety decisions.

Usage and Maintenance Tips

Turn off the device when it is not in use, as recommended in the manual, to help preserve sensor life.

If readings appear unusual, follow the manual's troubleshooting and reset instructions.

Ventilate an area when appropriate if oxygen levels are concerning, and investigate the cause rather than relying on the meter alone.

Important safety note: This instrument should not be treated as a certified life-safety device unless the manufacturer confirms the relevant certification and intended use. Do not use it as the sole safeguard in confined spaces or other oxygen-deficiency hazards. Follow applicable workplace safety procedures and use appropriately certified equipment where required.

Specifications
Display Method: LCD Screen
Measuring Items: Oxygen (O2), Temperature, Humidity
O2 Detection Method: Electrochemistry
O2 Measuring Range: 0 - 30.0% Vol
O2 Resolution: 0.1% Vol
O2 Accuracy: ±3% F.S.
Temperature Range: -10°C - 50°C (14°F - 122°F)
Temperature Resolution: 1°C (1.8°F)
Temperature Accuracy: ±1°C (±1.8°F)
Humidity Range: 20% - 85%
Humidity Accuracy: ±4%
Sampling Time: 1.5 Seconds
Atmospheric Pressure: 12.5 PSI - 15.4 PSI
Storage Temperature: -10°C - 60°C (14°F - 140°F)
Color-Coded O2 Levels: Green (Good): >18.0% Vol, Yellow (Slight): 18.1% - 10.0% Vol, Red (Serious): 10.1% - 0% Vol
Charging Requirements: 5V DC via USB Port (>=1000mA adapter recommended)