






Specifications:
1. Model: BH-90A
2. Gas Detected: Oxygen (O₂)
3. Measurement Range: 0–30% VOL
4. Detection Principle: Electrochemical sensor
5. Resolution: 0.1% VOL
6. Accuracy: ±3% F.S.
7. Alarm Mode: Sound, Light, Vibration
8. Alarm Thresholds: User-configurable (typically Low: 19.5%, High: 23.5%)
9. Display: LCD backlit screen
10. Power Supply: Rechargeable 3.7V lithium battery
11. Battery Life: Up to 8–12 hours continuous use
12. Charging Time: ~3–4 hours
13. Operating Temperature: −20°C to +50°C
14. Humidity Range: 15%–95% RH (non-condensing)
15. Dimensions: Approx. 100 mm × 60 mm × 30 mm
16. Weight: Approx. 150 g
17. Applications: Chemical plants, metallurgy, firefighting, mining, confined spaces, oil & gas environments