Level switch measurement with SENSseries

High-sensitive detectors for non-contact level switch measurement

The CrystalSENS LB 480 can be easily installed as a radiometric level switch on vessels and chemical reactors, even where other measurement systems reach their limits due to vessel geometry or measurement conditions. In all demanding industries, our level switch measurement is used. Wherever one or more limit levels of liquids or bulk solids are monitored, our contactless level measurement can be used, even with very thick-walled or large containers.

Functional safety

The high reliability of the measurement is supported by important diagnostic functions, e.g.  permanent monitoring of the detector function by comparison with 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, in addition to its use as a min/max level switch as a density or level field device in SIL2/3 safety circuits.

Perfect for the highest demands - your advantages at a glance

• Compact field probe with integrated transmitter
• Process connection via HART
SIL 2 or SIL 3 with homogeneous redundancy
• Quick Start menu for easy and quick start-up
• Daily function check and continuous self-monitoring
• High immunity to interference (SIL standard)
• External radiation detection - XIP (X-ray interference protection)

Detector for the most sensitive measuring tasks

The cosmic radiation control allows in many cases to maintain the required source activity very low. Thus, shield costs and the required radiation protection measures can also be kept low.
Do you need to replace the source for an existing and old measurement?
A pending source replacement can, depending on the application, be postponed for many years if the existing point detector is replaced by a SuperSENS.

Fast detection with SpeedStar

The product version SpeedStar is used when very fast occurrences have to be recognized immediately. The SpeedStar feature ensures extremely fast response times in the millisecond range. An example application is the edge detection of steel plates to straighten their cut edges while they are being transported on the roller conveyor, or to position glowing and scorching steel blocks. Furthermore, the detection of over or under-filled liquid containers, e.g. gas tanks while they are being conveyed.


LB 480
Detector operating data 
Power supply100 ... 240 VAC, ±10%, 50 ... 60 Hz, 8 VA
24 VDC (18 ... 32 VDC), 8 W
Cable connecting

4 cable entries M20 closed with blind plug
Option: Cable glands M20

Maximum cable length3300 m (120 Ω), 1600 m (250 Ω), 800 m (500 Ω)
Wire cross-section0.5 ... 1.5 mm2 (up to 2.5 mm2 without wire-end sleeve)
Housing materialStainless steel ISO 1.4301 / AISI 304, optional 316 L
(others upon request)
Water coolingOption (can also be retrofitted), max. 6 bar
 Scintillator size    Weight   Weight with
Ø x lenght [mm]   [kg]       cooling system[kg] Collimator

(point detectors)

50 x 50 (NaI/Tl)       12.5       16.5                          Option

SuperSENS150 x 150 (polymer) 52          59                           Standard

Ambient temperature
Operation and storage

-40 ... +60 °C (-40 ... +140 °F)
Observe possible temperature restrictions for Ex-protection!

Temperature stability

≤0,002%/ °C (-40 ... +60 °C) for CrystalSENS and/or
≤0,01 %/ °C (-40 ... +60°C) for UniSENS

Detector certificates
& tests
IP protectionIP65 / IP66 / IP67 / IP68 / IP69K

Explosion protection




II 2 GD Ex de IIC T5 Gb / Ex tb IIIC T95°C   -40°C...80°C
II 2 GD Ex de IIC T6 Gb / Ex tb IIIC T80°C   -40°C...65°C
II 2 GD Ex de [ia Ga] IIC 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)

Functional safetySIL2 / SIL3
Vibration / ShockVibration: 1.9g / mechanical Shock: 30 g
according to DIN EN 60068-6 and 60068-2-27
Signal inputs and outputs 
Signal outputHART 4 ... 20 mA potential-free, active or passive
Max. impedance: 500 Ω (active)
Resolution better than 0.006 mA
Stability +/- 0.001% /°C (-40 ... 60°C)
Voltage supply: 18 V ... 32 V (passive)
Max. impedance at 12 V: 250 Ω (passive)
Max. impedance at 24 V: 500 Ω (passive)
Digital outputsOpen Collector alternatively for: Max. alarm, min. alarm
warning messages + error messages
hold signal, interference radiation detection, detector temperature
Permissible load at ohmic load: max. 100 mA at 5 ... 36 VDC
InterfacesRS 485 for software update, cascading,
gas-density compensation
Detector service modemFor operation via PC
Data backupin non-volatile memory

Fast measurement sample rate in milliseconds
Radiation interference detection - XIP (X-ray interference protection)
Automatic warning source exchange
Event log, change log
Quickstart menu
Continuously monitored current output


Format Size
Level Measurement Brochure en PDF 4.85 MB
Product Data Sheet LB 480 en PDF 137.76 KB
SIL Approved Radiometric Detectors SENSseries LB 480 en PDF 339.29 KB
Whitepaper Radiometric Measurements Accurarcy, repeatability and errors en PDF 739.65 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 Level Switch en PDF 7.11 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
Level Switch en PDF 109.14 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 Control Software Version: 2.0.1 de, en ZIP 4.07 MB
Technical Information
Format Size
LB 480 Level Switch de, en PDF 1.02 MB