Hydrogen sensor transmitter
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1 Piece(s) (MOQ)
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): < 30 sec 5.Control unit: 10 bit microprocessor based 6.Warm up time: < 5 mins 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
programmable pressure transmitter
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Fischer ME50 is programmable pressure transmitter for liquid and gaseous media. It is equipped with: Ceramic membrane / diaphragm measuring cell for measuring range upto 400 mbar Front-flush piezoresistive element based measuring cell for measuring range above 400 mbarME50 can be configured or programmed to suit onsite conditions and media via either onboard display keypad or tool adaptor EU13. Working Principle: For ceramic diaphragm measuring cell (< 400 mbar): The measuring pressure is directly applied on the rugged ceramic diaphragm. This applied pressure cause distortion on measuring membrane. The change in capacitance due to pressure, is measured at the electrodes of the ceramic carrier and diaphragm.The electronics in the pressure transmitter housing convert the change in capacitance into standard electrical signals. For piezoresistive diaphragm measuring cell (≥ 400 mbar): The measured pressure acts on silicon diaphragm of a semi-conductor chip, causing it to distort. The specific resistance of the material changes in proportion of the level of distortion. The electronics module in the pressure transmitter convert the change in resistance into standard electrical signals. To optimise performance in line with prevailing process conditions, it is also possible to configure the pressure transmitter on-site via PC based programming adaptor EU13. Key Features: Onboard digital display, for measuring values Free choice of process measurement direction , axial or radial configurable on-site via onboard 3-key menu (off-set, range, damping, display indication) Robust housing High accuracy High vibration resistance Low hysteresis Key Specifications: With ceramic membrane / diaphragm measuring element: Measuring range: -25 ~ +25 mbar to 0 ~ 200 mbar smallest adjustable measuring span: 10 mbar overpressure safety: 4 bar With piezoresistive element measuring sensor ceramic membrane / diaphragm measuring element: Measuring range: 0 ~ 400 mbar to 0 ~ 40 bar; -0.6 ~ 0 bar to -1 ~ 15 bar overpressure safety: 4 bar to 120 bar Accuracy: ± 0.2% of full scale (including hysteresis and repeat accuracy) Permissible ambient temperature: -20° C ~ +80° C Permissible medium temperature: -10° C ~ +85° C Electrical connection: M12 plug-in connector Protection class: IP65 acc. to DIN EN 40050 Display: 3 1/2 digit LCD Materials (media contact): stainless steel 1.4404, ceramic AL2O3, Viton Seals Material (housing): stainless steel 1.4404 / 1.4571 Nominal power supply: 24 VDC Output: current / voltage 4~20mA, 2-wire Inverted curve: rising / falling Damping: 0 ~ 200 sec Industrial areas: Nuclear power plants Thermal / gas fired power plants Chemical & manufacturing industries Semiconductor plants Glass industries
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