Name: Liebherr sensors - ankersmid.eu
Brand: Liebherr

Liebherr sensors

The self-sufficient measuring device for precise water content/moisture determination in the running process guarantees the highest quality and safety in EX-protected production environments, the further processing and refinement of very many emulsions and bulk materials.

The PC software enables fast and accurate calibration of the measured sections.

Liebherr offers sensors for the following device protection categories:

Gas EX-protection:

II 1/2 G Ex db/ia IIC T4 Ga/Gb*

Dust EX-protection:

II 1/2 D Ex tb/ia IIIC T135°C Da/Db*

*Subject to type approval

The sensors are installed directly in pipes or in tanks.

The sensors are used, for example, in oils, crude oils, paints, lacquers, ethanol, solvents as well as in bulk materials under explosive conditions.

Producten

Categories: Liebherr

Markets

The WMS II sensors are permitted for the following markets:

In addition to their high precision and robustness, the measuring devices from Bad Schussenried are characterised by their reproducibility.

Once the system has been calibrated, further measuring points can be set up or devices renewed on this basis at any time without great effort. The plant thus always remains reliable, regardless of its previous term and age.

Technical data planarsensor P78-E

Suitable for use in potentially explosive atmospheres	Dust – Zone 22
Physical principle	Capacity determination in the high frequency stray field
Frequency	16 – 22 MHz
Measurement location	Outside silo via baffle plate, on belt with sliding shoe carriage, pipes, screw conveyors, tank, etc.
Measuring range	0 – 100% moisture content (measuring window adjustable)
Capacity resolution	10 fF
Update cycle	33 ms
Sampling rate mean value counter	16 – 22 10⁶
Maximum attainable measuring accuracy: With optimum material-specific calibration, with averaging with ideal flow behaviour with Litronic FMS II Evaluation and transfer module/PC Software	+/- 0.05 % moisture content
Measurement value transfer	digital: RS-485, multiprocessor log
Max. number of sensors on the bus	16
Maximum bus length	1200 m
Power supply	8 – 30V, 0.4 VA
Temperature measurement measuring range	-10 – 90 °C
Measuring accuracy temperature measurement	+/- 0.5 °C
Operating ambient temperature	5 – 72 °C
Working temperature – electronics	-20 – 80 °C
Storage temperature	-25 – 80 °C
Protection class	IP68
Connection cable type	UNITRONIC®ROBUST C 7×0.14 shielded
Connection cable length	6 m
Wearing protection	Zirconium oxide (ZrO2Al2O3)
Housing/flange material	V4A 1.4404 (Option: 1.4571)
Dimensions: Ø/Height	78/53/57 mm
Weight without cable	0.900 kg
Clamping flange weight	0.300 kg
Ex-protection	2014/34/EU ZELM 06 ATEX 3320X
Ex-marking	Ex II 3D Ex tD A22 IP6x T85°C Dc

Technical data sensor P45-GD

Suitable for use in potentially explosive areas	Dust/Gas – Zone 0/20
Measurement
Physical principle	Capacity determination in the high frequency stray field
Measurement location	Pipeline, Tank
Adjustable measuring range	0 – 100% moisture content (measuring window adjustable)
Number of scattered fields	1
Update cycle	50 ms
Achievable measurement accuracy	± 0.1 % with correct material curve
Temperature measurement accuracy	± 0.5 °C
Outflow
Measured value transmission – Sensor display content	Current loop with “4 – 20 mA” for external display and control unit (option)
Measured value transmission – sensor PLC or main computer	Analogue: “4 – 20 mA” active at 500 Ohm digital: Hart Modem, Modbus RTU
Valid measurement	3.75 mA to 21.6 mA (NAMUR)
Interface signal resolution	16 bit
Max. length of connecting cable	1000 m (depending on cable)
Power supply
Connection	24 V DC 15 V to 36 V DC 100 mA DC
Temperature
Medium temperature	-5 °C to 80 °C (Standard) -5 °C to 95° C (Option)
Ambient temperature	-20 °C to 80 °C
Storage temperature	-25 °C to 80 °C
Pressure
Pressure	-1 bar to 100 bar
Material
Rod material	V4A 1.4571, optional: 2.4819
Transmitter head material	Aluminium
Measuring field material/wearing protection	PEEK
Dimensions
Housing W/H/D	88 mm 160 mm 143 mm
Rod diameter	45 mm
Rod length	66 mm to 2000 mm
Measuring field material	PEEK

Technical data planarsensor P45-GD

Suitable for use in potentially explosive areas	Dust/Gas – Zone 0/20
Measurement
Physical principle	Capacity determination in the high frequency stray field
Measurement location	Pipeline
Adjustable measuring range	0 – 100% moisture content (measuring window adjustable)
Number of scattered fields	1
Update cycle	50 ms
Achievable measurement accuracy	± 0.1 % with correct material curve
Temperature measurement accuracy	± 0.5 °C
Outflow
Measured value transmission – Sensor display content	Current loop with “4 – 20 mA” for external display and control unit (option)
Measured value transmission – sensor PLC or main computer	Analogue: “4 – 20 mA” active at 500 Ohm digital: Hart Modem, Modbus RTU
Valid measurement	3.75 mA to 21.6 mA (NAMUR)
Interface signal resolution	16 bit
Max. length of connecting cable	1000 m (depending on cable)
Power supply
Connection	24 V DC 15 V to 36 V DC 100 mA DC
Temperature
Medium temperature	-5 °C to 80 °C (Standard) -5 °C to 95° C (Option)
Ambient temperature	-20 °C to 80 °C
Storage temperature	-25 °C to 80 °C
Pressure
Pressure	-1 bar to 100 bar
Material
Housing material	PEEK
Measuring field material/wearing protection	Ceramic, ZrO2
Material of flange for bolting on/flange for welding on	1.4435 / 1.4571
Dimensions
Housing W/H	45 mm 112.6 mm
Cable length	2 m to 10 m

Technical data planarsensor P78-GD

Suitable for use in potentially explosive areas	Dust/Gas – Zone 0/20
Measurement
Physical principle	Capacity determination in the high frequency stray field
Measurement location	Pipeline, bulk material
Adjustable measuring range	0 – 100% moisture content (measuring window adjustable)
Number of scattered fields	1
Achievable measurement accuracy	± 0.1 % with correct material curve
Temperature measurement accuracy	± 0.5 °C
Outflow
Measured value transmission – Sensor display content	Current loop with “4 – 20 mA” for external display and control unit (option)
Measured value transmission – sensor PLC or main computer	Analogue: “4 – 20 mA” active at 500 Ohm digital: Hart Modem, Modbus RTU
Valid measurement	3.75 mA to 21.6 mA (NAMUR)
Interface signal resolution	16 bit
Max. length of connecting cable	1000 m (depending on cable)
Power supply
Connection	24 V DC 15 V to 36 V DC 100 mA DC
Temperature
Medium temperature	-5 °C to 80 °C (Standard) -5 °C to 95° C (Option)
Ambient temperature	-20 °C to 80 °C
Storage temperature	-25 °C to 80 °C
Pressure
Pressure	Flange for bolting on: -1 bar to 1 bar Flange for welding on: -1 bar to 80 bar
Material
Housing material	1.4435 / 1.4571
Measuring field material/wearing protection	Ceramic, ZrO2
Material of flange for bolting on/flange for welding on	1.4435 / 1.4571
Dimensions
Housing W/H	86 mm 120 mm
Cable length	2 m to 10 m

Voordelen

Indirect measuring method: Capacity determination in the high frequency stray field. This method uses the different dielectric constant (permittivity) of water and different materials (solids and liquids)
Fully reproducible sensors: If the plant is subsequently extended with sensors or if sensors are replaced, no recalibration is necessary thanks to the built-in microprocessor.
Process control and regulation: Thanks to extensive interfaces, the moisture measurement can be integrated into process control systems and controls.
Cost saving: Time-consuming and costly laboratory analyses are no longer necessary or can be reduced.
Temperature measurement/temperature compensation: The sensor can also be used to determine the temperature of the medium.
Limit values: Maximum or minimum limits can be set using the software. Light or sound signals can be triggered if required.
Mean value calculator: The sensor passes on already averaged values to the FMS evaluation and transfer module.
Compressive strength: The rod sensor withstands process pressures of up to 100 bar.
Sliding fitting: For cleaning, flushing or sensor replacement, the sliding fitting can be easily pulled out of the pipeline even under these circumstances without disturbing the process.

Accessories

Pressure sensor: The pressure sensor measures the pressure of the pipeline or tank system. (only on P45-GD rod sensor)
Flange: Use the flange to connect the sensor to the pipeline, tank system or bulk solid receptacle
Sliding fitting: With the sliding fitting you can mount the sensor on tank systems (rod sensor). The sliding fitting allows the sensor to be changed quickly without having to empty and depressurise the tank.
External display and control unit: The display and control unit is mounted up to 50 m away from the sensor in an easily accessible position. It is connected directly to the electronics of the sensor and powered by it.
Software: for start-up and configuration.