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data sheet LMK 351

data sheet LMK 351
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LMK 351 Screw-in Transmitter Ceramic Sensor accuracy according to IEC 60770: standard: 0.35% FSO option: 0.25% FSO Nominal pressure The screw-in transmitter LMK 351 has been designed for measuring small system pressure and level measurement in container. The LMK 351 is based on an own-developed capacitive ceramic sensor element. Usage in viscous and pasty media is possible because of the flush mounted sensor. from 0 ... 40 mbar up to 0 ... 20 bar Output signal 2-wire: 4 ... 20 mA 3-wire: 0 … 20 mA / 0 … 10 V others on request For the usage in aggressive media a pressure port in PVDF and the diaphragm in AI2O3 99.9 % is available. An intrinsically safe version completes the range of possibilities. pressure port PVDF-version for aggressive media pressure port G 1 1/2" for pasty and polluted media Preferred areas of use are Plant and machine engineering Environmental engineering (water – sewage – recycling) IS-version Ex ia = intrinsically safe for gases and dust customer specific versions Preferred used for Fuel and oil Viscous and pasty media BD SENSORS GmbH BD-Sensors-Straße 1 D - 95199 Thierstein

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Pressure ranges Nominal pressure Level Overpressure Permissible vacuum Output signal / Supply Standard Option IS-version Option 3-wire Performance Accuracy 1 Permissible load Influence effects Long term stability Turn-on time Mean measuring time Response time 1 Technical Data standard: ≤ ± 0.35 % FSO current 2-wire: Rmax = [(VS – VS min) / 0.02 A] Ω supply: 0.05 % FSO / 10 V ≤ ± 0.1 % FSO / year at reference conditions 700 msec 5/sec mean response time: ≤ 200 msec option for pN ≥ 0.6 bar: ≤ ± 0.25 % FSO voltage 3-wire: Rmin = 10 kΩ load: 0.05 % FSO / kΩ max. response time: 380 msec accuracy...

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Technical Data Wiring diagram 2-wire-system (current) supply + Electrical connection Supply + Supply – Signal + (only for 3-wire) Shield compact field housing IN + IN – OUT + cable colours (IEC 60757) WH (white) BN (brown) GN (green) GNYE (green-yellow) Electrical connections (dimensions in mm) standard cable outlet with PVC cable (IP 67) 3 cable outlet, cable with ventilation tube (IP 68) 4 compact field housing (IP 67) standard: 2 m PVC cable without ventilation tube (permissible temperature: -5 ... 70 °C) different cable types and lengths available, permissible temperature depends on...

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4 … 20 mA / 2-wire 0 … 10 V / 3-wire intrinsic safety 4 … 20 mA / 2-wire customer Accuracy standard: 0.35 % FSO option for pN ≥ 0.6 bar: 0.25 % FSO customer Electrical connection male and female plug ISO 4400 male plug Binder series 723 (5-pin) cable outlet with PVC cable (IP67) cable outlet, cable with ventilation tube (IP68) male plug M12x1 (4-pin) / metal compact field housing stainless steel 1.4301 (304) customer Mechanical connection G1 1/2" DIN 3852 with flush sensor customer Seals FKM EPDM FFKM customer Pressure port stainless steel 1.4404 (316L) PVDF customer Diaphragm ceramics...

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