CD4 Four-in-one Gas Alarm Instrument

General Simultaneous detection and display: methane (CH4), carbon monoxide (CO), oxygen concentration (O2), and hydrogen sulfide (H2S) Applicable sites: on-site detection for petrochemistry, coal, metallurgy, chemical industry, city gas and so on. Product features 1.Highly intelligent technology, easy operation, stability and reliability 2.High-definition digital display and battery voltage indication 3.The alarming point can be set in accordance with the requirements of the user. 4.Automatic background light function and alarm vibration function (optional) 5.Grade Two audible and visual alarm function Main technical specifications 1. Measurement principles: catalytic combustion type sensor (CH4) Electrochemical sensor (CO, O2 and H2S) 2. Measured gas: methane (CH4) and carbon monoxide (CO) Oxygen (O2) and hydrogen sulfide (H2S) 3. Measuring method: diffusion type measurement method CH4: 0 to 4.00% CH4 O2: 0 to 25.0% VOL CO: 0 to 1000 ppm H2S: 0 to 100 ppm 4. Measuring range: CH4: ±10% O2: ±0.7% VOL CO: ±5% H2S: ±5% 5. Measuring accuracy: full range (adjustable) 6. Alarming point setting: real-time display of the battery power 7. Battery power display function: highlight digital display and alarm sound of 80 dB 8. Display and audible and visual alarm resolution: CH4:0.01% CH4 O2: 0.1% VOL CO: 1 ppm H2S: 1 ppm 9. Continuous operating time after being completely charged: more than 15 hours 10. Power supply: 3.6 V rechargeable lithium battery 11. Temperature / humidity: 0 to 14 / ≤ 98% RH (non-condensing) 12. Dimension / weight: 105 (L) × 56 (W) × 28 (H) mm / 250 g 13. Explosion-proof type: Eibdl (150) vibration protection and antistatic ABS case 14. Others: automatic zero setting, calibration, and background light display