TC Fluid Control Sanitary Level Sensor

 The model FLM-H magnetostrictive sensor has been specifically designed for the requirements of the food and beverage, pharmaceutical, and biotechnology industries. The sensor is particularly suitable for the special conditions of CIP/SIP cleaning processes, such as chemical stability towards cleaning liquids and high temperatures.

The guide tube is directly welded to the process connection, which guarantees a crevice-free connection, additional sealings are not required.

The sensor is supplied with a DC voltage of 10 ... 30 V. Available output signals are 4 ... 20 mA or 4 ... 20 mA with HART^® signal.

The hygienically designed sensor housing, with an ingress protection of up to IP 68, offers a secure protection for external cleaning with splash water and enables its use in high-humidity environments.

The model FLM-H sensor fulfils the high demands of sanitary applications. It is marked with the 3-A symbol and current version number, as it conforms, based on a third party verification, to the 3-A standard.

Features

Features

• Fully welded and dead space free
• Operating limits:
  - Operating temperature: T = -40 ... +250 °C
  - Operating pressure: P = Vacuum to 10 bar
• Insensitive to foaming, ideal for interface measurement
• High-precision level measurement: Accuracy < 0.5 mm
• Wide variety of hygienic process connections
• Large range of application due to the simple, proven functional principle
• For harsh operating conditions, long service life
• Continuous measurement of levels, independent of physical and chemical changes of the media such as: Foaming, conductivity, dielectric, pressure, vacuum, temperature, vapours, condensation, bubble formation, boiling effects, density change
• Signal transmission over long distances
• Simple installation and commissioning, onetime calibration only, no recalibration necessary
• Level displayed proportional to volume or height

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Applications

• Food and beverage industry
• Pharmaceutical industry
• Biotechnology
• Level measurement in fermenters

Design and operating principle

• The measuring process is triggered by a current impulse. This current produces a circular magnetic field (3) along a wire (1) made of magnetostrictive material fixed in the guide tube.
• At the point being measured (liquid level) there is a float with permanent magnets (4) acting as a position transducer.
• The interaction of both magnetic fields generates a mechanical torsion wave (5) in the wire.
• This is converted into an electrical signal at the end on the wire in the sensor housing (2) by a piezoceramic converter.
• The measured propagation delay enables the origination point of the mechanical wave, and thus the float position, to be determined with high accuracy.

Sensor, sterile version, model FLM-H

Electrical connection :

• Sensor housing (Version with separate sensor base support)
• Stainless steel 1.4305 with cable gland M16 x 1.5 polyamide or hygienic design (Version with welded tube end)

Process connection : 

• Clamp connection ISO 2852 (DN 32 ... DN 100 or 1.5" ... 4")
• Clamp connection DIN 32676 (DN 32 ... DN 100 or 1.5" ... 4")
• Aseptic mounting thread downwards DIN 11864-1 (DN 32 ... DN 100 or 1.5" ... 4")
• Aseptic collar connecting sleeve DIN 11864-1 (DN 32 ... DN 100 or 1.5" ... 4")
• Aseptic flange connection DIN 11864-2 (DN 32 ... DN 50 or 1.5" ... 2")
• Aseptic clamp connection DIN 11864-3 (DN 32 ... DN 100 or 1.5" ... 4")
• VARIVENT (form F, N and G)
• BioConnect® threaded connection (DN 32 ... DN 100 or 1.5" ... 2")
• BioConnect® flange connection (DN 32 ... DN 100 or 1.5" ... 2")
• BioConnect® clamp connection (DN 32 ... DN 100 or 1.5" ... 2")

Guide tube diameter : 12, 14 or 17.2 mm (stainless steel 1.4435 or 1.4404, surface ground and polished, Ra ≤ 0.8 μm or Ra ≤ 0.4 μm)

Guide tube length L max. : 6,000 mm

Float :

• Material stainless steel 1.4435 or 1.4404
• Float diameter 50 or 80 mm
• Float selection depending on guide tube diameter

Density range :

• Float diameter 50 mm: 1100 kg/m³ ... 1860 kg/m³
• Float diameter 80 mm: 770 kg/m³ ... 1162 kg/m³

Max. operating pressure : 10 bar

Temperature range :

• Medium standard -40 ... +250 °C
• Ambient temperature at the sensor housing -40 ... +85 °C
• Storage temperature: -20 ... +60 °C

Output signal : 4 ... 20 mA, HART®
Power supply : DC 10 ... 30 V
Accuracy : < ±0.5 mm
Resolution : < 0.1 mm
Load max. : 900 Ω at 30 V
Mounting position : Vertical ±30°
Ingress protection : IP 68 per EN 60529 / lEC 60529

Download Dataseheet : TC Fluid Control Sanitary Level Sensor

Reference : tc-fluidcontrol.com