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Key Features:1.Catalytic bead based Pellistor sensor cell with low flash energy2. 10-bit microprocessor control unit3.Non-intrusive one man calibration via hall effect switches4.ATEX certified explosion proof flameproof, suitable for Zone 1, 2 gas explosion installation5.Linear, proportional analog industry standard current output6.Continuous system self-diagnosis with watch dog7.Flashback arrestor with sintered filter8.Auto Zero point tracking to zero point compensation9.SIL 2 HW TUV certified10.RS485 serial interface with Modbus RTU communication (optional)11. 1 or 3 relay output module (optional)12.System and alarm LED indicators (optional)13.Modbus RTU communication over RS485 serial interface Technical Specifications:1.Measuring Parameters: hydrogen gas flammability or leakage2.Sensor Technology: Catalytic bead based pellistor sensor cell3.Measuring range: 0 100 % LEL ( 0 4% vv @ STP)4.Response time (t90): < 30 sec5.Control unit: 10 bit microprocessor based6.Warm up time: < 5 mins7.Auto zero point tracking for drift compensation8.Power supply: 24 VDC9.Ingress protection: IP6510.Enclosure: Stainless steel (for sensor cell), anti-static epoxy coated metal alloy (for transmitter)11.Output: linear, proportional 4-20mA12.Mounting: wall, duct, pipeline13.Safety integrity level: SIL 214.ATEX marking: CE 722 Ex II 2G EEx d IIC T6, CE 722 Ex II 3G EEx nA IIC T615.Optional: LCD Display, alarm LEDs, potential free relay contacts16.Hazardous area: Zone 1, 2