LW2720
Electronic level sensor
16
6.5 Nozzle requirements
u
To allow the radar waves to propagate undisturbed, the specified nozzle dimensions should be
observed (
Ò
Fig. Nozzle dimensions and table).
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The inside of the nozzle must be smooth (i.e. avoid bad welding, rust, or deposit).
D
H
Fig. 9: Nozzle dimensions
Maximum nozzle height (H) as a function of the nozzle diameter (D):
Nozzle diameter (D)
Nozzle height (H)
40 mm (1.5 in.)
150 mm (5.9 in.)
50 mm (2 in.)
200 mm (7.9 in.)
80 mm (3 in.)
300 mm (11.8 in.)
100 mm (4 in.)
400 mm (15.8 in.)
150 mm (6 in.)
600 mm (23.6 in.)
6.6 Notes for hygienic applications
The unit withstands standard CIP routines and SIP routines up to 140 °C.
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To conform with applicable hygienic standards and food and beverage legislation and regulations,
make sure:
– the unit is installed in a closed tank.
– the unit is installed with hygienic adapter and O-ring/seal.
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It is the responsibility of the user to ensure:
– the materials used (
Ò
Data sheet) are suitable for the media to be detected and the cleaning/
sanitising processes.
– the installation of the unit is drainable and cleanable.
– that the joint/clamping between the unit and the nozzle is compatible with the tank pressure and
media.
– that for the application an M12 connector with appropriate ingress protection against dirt and
moisture is used.
6.6.1 Notes on the use according to EHEDG
The unit is suited for CIP (cleaning in process) when installed correctly.
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Observe the application limits (temperature and material resistance) according to the data
sheet.
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Ensure that the installation of the unit in the system complies with EHEDG guidelines.
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Use self-draining installation.
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Only use process adapters permitted according to EHEDG with special seals required by the
EHEDG position paper.
The gasket of the system interface must not be in contact with the sealing point of the sensor.
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In case of structures in a tank, the installation must be flush mount. If not possible then direct water
jet cleaning and cleaning of dead spaces must be possible.
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Install leakage ports so that they are clearly visible.
