The measurement system LB 440 is used to monitor the level of liquids or bulk materials continuously. The non-contacting and non-intrusive measurement can easily be installed on existing reactors, autoclaves, vessels and bunkers.

LB 440 is available with proven 2-wire technology. It comprises a state of the art evaluation unit, which allows for an easy calibration and operation of the measurement and can also be used as a local display.

The system provides both, an intrinsically safe power supply and output signal. LB 440 is proven-in-use and has also applications in SIL2 graded plants.

LB 440

Evaluation unit
Power supply :115/230 VAC, ±10%, 50 ... 60 Hz, 30VA 24 VDC (18 ... 32 VDC), 30W; 24 VAC, +10%/-15%, 50 ... 60 Hz, 30 VA

Detector operating data              
Power supply: Supplied by evaluation unit via a 2-wire signal cable
Housing material: Stainless steel ISO 1.4301 / AISI 304
Water cooling: Option (can also be retrofitted), max. 6 bar

Scintillator: Size Ø x length [mm]
CrystalSENE (point detectors): 25 x 25 (NaI/Tl), 40 x 35 (NaI/Tl), 50 x 50 (NaI/Tl)
UniSENS (rod detectors): 50 x 500 (polymer), 50 x 750 (polymer), 50 x 1000 (polymer), 50 x 1250 (polymer), 50 x 1500 (polymer),50 x 2000 (polymer)
SuperSENS:150 x 150 (polymer)
Ambient temperature Operation and storage: -40 ... +60 °C (-40 ... +140 °F) for NaI/Tl and/or -40 °C ... +55 °C (-40 ... +131 °F) for polymer Observe possible temp. restrictions for Ex-protection!
Temperature stability: ≤0,002%/ °C (-20 ... +50 °C) for NaI/Tl and/or ≤0,01 %/ °C (-20 ... +50°C) for polymer

Detector certificates & tests     
Explosion protection     
ATEX:
II 2 G EEx de IIC T6                                     -40 ... +73 °C
II 2 D EEx de IIC T6 IP65 T80                       -40 ... +73 °C
II 2 G EEx ib IIC T6                                      -20 ... +60 °C
FM/CSA:
Class I Division 1 Group A, B, C, D                 -20 ... +50 °C
Fm:
Class II Division 1 Group E, F, G                    -20 ... + 50°C
Other certificates             Nepsi, TIIS, Kosha, others upon request

Signal inputs and outputs           
Signal output: 0/4 ... 20 mA potential-free / max. impedance 500 Ω
Digital inputs:Hold input
Digital outputs:1 relay for collective fault message,2 relays for min. / max. Alarm or detector temperature
Interfaces: RS 232 for parameter export or PC operation using UNIBERT

Advantages of the Berthold Multiphase Level Measurement

•           Easy mounting outside of the vessel, easily accessible
•           Not contacting the measured material
•           Reliable technology for extreme conditions
•           Insensitive to scaling
•           Easy commissioning and calibration
•           No-recalibrations required
•           No wear and tear, maintenance-free
•           Representative through long penetration path
•           SIL2 / SIL3 approval

Multiphase Level Measurement in the Oil & Gas industry

In the oil & gas producing industry the Multiphase Level Measurement from Berthold is used to measure the different layers of sand, water, emulsion, oil and foam in separators or slug catchers. Due to the use of Cs-137 isotope and high sensitive scintillation detectors at the vessel outside this solution provides the highest level of reliability and accuracy. The long distance between source and detector allows for covering a wide area which leads to a very good and representative picture of the density profile and even light foam can be perfectly detected - while scaling that might build up over time doesn’t affect the measurement performance.

The Uni-Probe LB 490 is used for the non-contacting, non-intrusive measurement of point level or continuous level.
Uni-Probe LB 490 is a compact field device, combining both detector and evaluation in one single instrument. It provides interfaces for

• HART
• Profibus PA
• Foundation Fieldbus

Even when using the level measurement Uni-Probe LB 490 in Profibus or Fieldbus systems you will have always the possibility to switch over to HART communication in case of need. In addition the separate 4-20mA current output can always be used as alternative signal output.

The level detector SENSseries LB 480 is a compact field device combining cutting-edge measurement technology with the highest level of manufacturing quality and innovative features – the best system for high demand applications:

• High level and low level switch  
• Continuous level measurements
• Interface layer measurements