Model: CD4 Description: CD4 Multi-parameters Gas Detector MA: MFA150188 KA: KFA150017 ExibI : 320150860 ExiaII: CMExC17.4385 Introduction: 1. Detect the gas concentration of CH4, O2, CO, H2S. 2. 8 digitals micro-controller as control unit, high sensitivity and fast response speed, high precision detecting element. 3. Large LCD screen to ensure high definition display. 4. Detector will cause luminescence and voice alarm if gas concentration is over standard. Technology parameters: 1. CH4: Measuring range Error expected 0.00~1.00 ± 0.10 1.00~3.00 Truth value ± 10% 3.00~4.00 ± 0.30 2. O2 Measuring range Error expected 0.0~5.0 ± 0.5 >5.0~30.0 Measuring value ± 3% 3. CO Measuring range Intrinsic error Absolute error Relative error 0~20 ± 2 >20~100 ± 4 >100~500 Truth value ± 4% >500~1000 Truth value ± 5% >1000~2000 Truth value ± 6% 4. H2S Measuring range Intrinsic error 0~49 ± 3 50~100 Truth value ± 10% >100~500 Truth value ± 15% 5. Response time: T8 hours 12. Sensor lifetime: 2 years 13. Levels of protection: IP65 14. Dimension: 68mmÃ?33mmÃ?124mm 15. Weight: 400g