Density measurement with SENSseries LB 480

Highly sensitive detectors for contactless density measurement

The SENSseries LB 480 density meter is a compact field device that combines top of the class measuring technology with maximum manufacturing quality and innovative features - the best system for challenging measuring tasks:

  •           Density measurement
  •           Concentration measurement
  •           Solid content measurement

Functional safety

The high reliability of the measurement is supported by important diagnostic functions, such as permanent monitoring of the detector function by crosschecking the cosmic background radiation and much more. This guarantees outstanding operational safety.
The cosmic radiation control also makes it possible to keep the required source activity very low. Only Berthold Technologies is able to use the LB 480 as a density or min/max level switch in SIL2 / 3 safety circuits, in addition to its use as a level field device.

Perfect for the highest demands - our benefits at a glance

• Compact field probe with integrated evaluation unit
SIL 2 or SIL 3 with homogeneous redundancy
• Process connection via HART
• Quick-Start menu for effective, fast and easy to use start-up
• Continuous self-monitoring through the unique and unrivalled
   cosmic radiation control by Berthold
• Patented 4 ... 20 mA current output
• High immunity to interference (SIL standard)

Be SENSitive

Berthold density measurement SENSseries detectors offer optimum sensitivity and extremely high measurement accuracy. This makes it possible to work with very low source activities - a big advantage in terms of shield costs and radiation protection measures.

Density measurement with SpeedStar

The product version SpeedStar is used when very fast process changes have to be recognized immediately. SpeedStar offers a uniquely short cycle time of 50ms. One application is the thickness measurement of plates or pipes that are conveyed during manufacturing.



CrystalSENS Detector

Point detector with high-sensitive, high-quality Sodium Iodide crystal for best long-term stability.

SuperSENS Detector

Best sensitivity on the market, is able to work with smallest source activities.
LB 480
Detector operating data 
Power supply100 ... 240 VAC, ±10%, 50 ... 60 Hz, 8 VA
24 VDC (18 ... 32 VDC), 8 W
Housing materialStainless steel ISO 1.4301 / AISI 304 (others upon request)
Water coolingOption (can also be retrofitted), max. 6 bar
Scintillator Size Ø x lenght [mm]
(point detectors)
50 x 50 NaI (Tl)
Ambient temperature
(Operation and storage)
-40 ... +60°C (.40 ... +140 °F) for NaI (Tl),
observe possible temp. restrictions for Ex-protection!
Temperature stability≤0.002%/°C (-40 ... +60°C) for NaI (Tl)
Detector certificates & tests 

Explosion protection





II 2 GD Ex db eb IIC T5/Ex tb IIIC T95°C -40°C...80°C
II 2 GD Ex db eb IIC T6/Ex tb IIIC T80°C -40°C...65°C
II 2 GD Ex de (ia Da) IIIC T6 Gb              -40°C...50°C
II 2 GD Ex de (ia Da) IIIC T80°C Db         -40°C...50°C
Class I, Division 1, Group B, C, D
Class I, Division 1 Group A, B, C, D
Class II, Division 1, Group E, F , G
Class I Zone 1 AEx de IIC
Class I Zone 1 AEx de (ia) IIC

-40°C... 80°C (T1-T5), 40°C...65°C (T6)

Vibration / ShockVibration: 1.9 g / mechanical Shock: 30 g
according to DIN EN 60068-6 and 60068-2-27
Signal inputs and outputs 
Signal outputsHART 4 ... 20 mA
Resolution better than 0.006 mA
Stability +/-0.0001 %/°C (-40 ... 60°C)
Analogue inputPt100 for temperature compensation
Digital outputsOpen Collector alternatively for: max./min. alarm, warning messages + error messages, hold signal, radiation interference detection, detector temperature
InterfacesRS 485 for software update


Format Size
Densidad y Concentracion solidos Spanish language en PDF 2.65 MB
Density measurement - system overview en PDF 1.57 MB
Medicao de Densidade e Concentracao Portuguese language en PDF 2.81 MB
SENSseries LB480 en PDF 1.49 MB
SIL Approved Radiometric Detectors SENSseries LB 480 en PDF 339.29 KB
Format Size
ATEX LB 480 en PDF 6.51 MB
IECEx LB 480 en ZIP 3.03 MB
LB 480 CSA Ex for Zones USA & Canada Certificate de, en PDF 322.25 KB
LB 480 FM Ex for Class/Division in Canada de, en PDF 229.69 KB
LB 480 FM Ex for Class/Division in USA de, en PDF 229.78 KB
LB 480 Summery Ex-Certificates en PDF 66.71 KB
SIL SENSseries LB 480 en PDF 473.42 KB
Operation Manual
Format Size
LB 480 Density en PDF 7.83 MB
Product Information
Format Size
DTM for SENSseries LB 480 & SmartSeries LB 414 en PDF 2.43 MB
LB 480 CSA Cerficate en PDF 1.76 MB
LB 480 SIL en PDF 3.44 MB
Project Questionnaire
Format Size
Density Portugiese Language en PDF 500.16 KB
Software Tool
Format Size
FlashLoader for Software Update de, en ZIP 2.97 MB
LB 480 & LB 414 HART DTM V2.4.4.61 Software Level, Density, Switch de, en ZIP 18.19 MB
LB 480 DeviceDescription for 475 HART-Communicator Level, Density, Switch de, en ZIP 470.58 KB
LB 480 Embedded Software V01.00.06 Level, Density, Switch de, en ZIP 3.87 MB
LB 480 HART DD Software HCF Level, Density, Switch de, en ZIP 1.18 MB
LB 480-PC User Interface de, en ZIP 4.07 MB
Technical Information
Format Size
LB 480 Density de, en PDF 1.94 MB