Hydrostatic pressure sensor LHC-M**

• Hydrostatic pressure sensor for gases, vapors, liquids and dusts
• High accuracy of measurement
• Housing fulfils the special hygienic requirements of the foodstuff and pharmaceutical industries
• Large selection of process connections: universal use
• Dry capacitive ceramic sensor до 40 bar
• Piezoresistive metal sensor for Диапазон измеренийs до 400 bar
• Wide variety of electronic modules (e. g., relay, thyristor signal output): the right connection for every process control system
• Process connections acc. to EHEDG
• до SIL2 acc. to IEC 61508

Application
Function principle		sensor for absolute and relative pressure measuring in gases, vapors, liquids and dusts ceramic sensor (LHC-M20) The pressure causes a slight deflection of the ceramic diaphragm of the sensor. The change in the capacitance is proportional to the pressure and is measured by the electrodes of the ceramic sensor, volume of chamber: приблизительно 2 mm3. metal sensor (LHC-M40) The process pressure acting on the metallic separating diaphragm of the sensor is transmitted via a fill liquid to a resistance bridge. The change in the output voltage of the bridge is proportional to the pressure and is then measured, volume of chamber: smaller than 1 mm3.
Function and system design
Equipment architecture		- with analogue electronics I2/IB 4 ... 20 mA and auxiliary energy, e. g. via transmitter power pack, calibration across potentiometer for lower range value and upper range value, optionally analogue display for measuring value indication - with HART electronics IA/IH with токовый выход 4 ... 20 mA, HART communication signal and auxiliary energy, e. g. via transmitter power pack, calibration via two keys on the device, handheld terminal or PC with operating program, optional digital display for measured variable indication - with PROFIBUS PA electronics PA/PB with digital communication signal PROFIBUS PA and segment coupler for connection to PLC or PC with operating program, optional digital display for measured variable indication
Input characteristics
Measured variable		absolute or relative pressure
Measurement range		see section Диапазон измерений
Output characteristics
Output signal		analog electronics I2/IB: 4 ... 20 mA HART electronics IA/IH: 4 ... 20 mA with HART Протокол PROFIBUS PA electronics PA/PB: digital communication signal
Auxiliary energy
Electrical connection		connection cable: - экранированный, twisted pair two-wire cable - terminals for wire cross-sections 0.14 ... 2.5 mm2 - cable outer diameter: 5 ... 9 mm (0.2 ... 0.35 in) M12 plug Harting plug (Han7D)
Supply voltage		analog electronics I2/IB: 11.5 ... 45 V DC HART electronics IA/IH: 11.5 ... 45 V DC PROFIBUS PA electronics PA/PB: 9 ... 32 V DC Version for hazardous area see safety information.
Current consumption		PROFIBUS PA electronics PA/PB: 11 mA ±- 1 mA
Operating conditions
Ambient conditions
	Ambient temperature	-40 ... 85 °C (-40 ... 185 °F) onsite display with analogue electronics I2/IB: -30 ... 80 °C (243 ... 353 K) onsite display with HART electronics IA/IH or PROFIBUS PA electronics PA/PB: -25 ... 70 °C (248 ... 343 K) Lower temperatures minimize the display speed.
	Storage temperature	-40 ... 100 °C (-40 ... 212 °F) onsite display: -40 ... 80 °C (233 ... 353 K)
Физические/механические параметры
Стандарты защищенности		IP66 for devices with cable gland, cable entry IP68 for devices with assembled cable or M12 plug
Mechanical construction
Dimensions		housings: Нержавеющая сталь housing 74 x 97 mm (2.9 x 3.8 in), aluminium housing 74 x 117 mm (2.9 x 4.6 in), length depends on process connection and cover process connections see section dimensions
Масса		LHC-M20: Нержавеющая сталь 1.8 kg, aluminium 2.1 kg LHC-M40: 1.5 ... 16.8 kg, depends from process connection
Материал корпуса		housing: - Нержавеющая сталь 1.4404/316L or cast aluminium housing with protective полиэстер based powder coating nameplates: - Нержавеющая сталь housing: engraved on housing with laser - aluminium housing: 1.4301/304) process connections (in contact with the medium): - Нержавеющая сталь 1.4435/316L process diaphragm (in contact with the medium): - LHC-M20: Al2O3 aluminium oxide ceramic (FDA listed), 96 %, extremely clean 99.9 % - LHC-M40: Нержавеющая сталь 1.4435/316L, Hastelloy C276, tantalum, PTFE folio 0.09 mm on 1.4435/316L (not for vacuum), PTFE folio 0.25 mm on 1.4435/316L (not for vacuum) seals: - FKM Viton (also in versions Смазка-free and for oxygen use), NBR, FFKM Kalrez, FFKM Chemraz, EPDM O-ring for cover sealing: - Нержавеющая сталь housing: silicone - aluminium housing: NBR mounting accessories for pipe and wall mounting: - Нержавеющая сталь 1.4301/304 measurement cell: - LHC-M20: without oil filling, dry sensor, - LHC-M40: oil filling: optional silicone oil, vegetable oil, glycerine, high temperature oil, fluorolube Смазка-free for oxygen use capillary: - 1.4571/316Ti protective hose for capillary: - 1.4301/304
Certificates and Сертификаты
Ex approval		DMT 02 ATEX E 137, DMT 02 ATEX E 138 , for additional certificates see www.pepperl-fuchs.com
Type of protection		II 1G EEx ia IIC T4/T6 (DMT 02 ATEX E 137) II 1/2G EEx ia IIC T4/T6 (DMT 02 ATEX E 137) II 2G EEx ia IIC T4/T6 (DMT 02 ATEX E 137) II 1/2D IP66 T50/82°C (DMT 02 ATEX E 137) II 1/2D IP66 T85°C (DMT 02 ATEX E 137) II 1/3D IP66 T110°C (DMT 02 ATEX E 138) II 3 G EEx nA II T5
SIL classification		до SIL2 acc. to IEC 61508

Аксессуары и комплектующие

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