Hydrogen Sensor Transmitter

Key Features:
1.Catalytic bead based Pellistor sensor cell with low flash energy
2. 10-bit microprocessor control unit
3.Non-intrusive one man calibration via hall effect switches
4.ATEX certified explosion proof flameproof, suitable for Zone 1, 2 gas explosion installation
5.Linear, proportional analog industry standard current output
6.Continuous system self-diagnosis with watch dog
7.Flashback arrestor with sintered filter
8.Auto Zero point tracking to zero point compensation
9.SIL 2 HW TUV certified
10.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 leakage
2.Sensor Technology: Catalytic bead based pellistor sensor cell
3.Measuring range: 0 ~ 100 % LEL ( 0 ~ 4% vv @ STP)
4.Response time (t90):
5.Control unit: 10 bit microprocessor based
6.Warm up time:
7.Auto zero point tracking for drift compensation
8.Power supply: 24 VDC
9.Ingress protection: IP65
10.Enclosure: Stainless steel (for sensor cell), anti-static epoxy coated metal alloy (for transmitter)
11.Output: linear, proportional 4-20mA
12.Mounting: wall, duct, pipeline
13.Safety integrity level: SIL 2
14.ATEX marking: CE 722 Ex II 2G EEx d IIC T6, CE 722 Ex II 3G EEx nA IIC T6
15.Optional: LCD Display, alarm LEDs, potential free relay contacts
16.Hazardous area: Zone 1, 2