Level Measurement DuoSeries LB 470

Proven 2-wire technology with trend-setting functions

DuoSeries LB 470 is the radiometric level measurement from Berthold in true 2-wire technology, which is now also available with radiation interference detection (RID). The level measurement DuoSeries is characterized by a particularly high accuracy and reproducibility. Because of its superior quality, the DuoSeries is the first choice for demanding processes and wherever maintenance and control technology is used.

Measuring principle level measurement

The DuoSeries measuring system consists of a scintillation detector – CrystalSENS point detector or UniSENS rod detector – and a sophisticated transmitter unit for display and operation. The transmitter is a state-of-the-art control unit with robust 3.5” TFT touch panel, powerful Dual Core CPU and diverse operator interfaces. Advanced self diagnostics and monitoring features ensure a safe function of the system. Furthermore the data logging functionality allows operators to analyze their processes in depth, e.g. develop trends, track process changes etc.

DuoSeries LB 470 - Your advantages at a glance:

  • Unique: radiometric level measurement with intrinsically safe power supply (Full Ex-i)
  • Ideal for all standard applications, but also for tricky measuring tasks
  • Simple, intuitive operation via touch screen
  • Important maintenance-oriented diagnostic functions and self-monitoring
  • Compatible with the previous model
  • All common Ex-approvals
  • Many different dialog languages are available

RID (Radiation Interference Discrimination)

Level measurement with LB 470 RIDLevel measurement with LB 470 RID If you want to continue to measure with impending external radiation, then the "LB470RID" version is required. The measurement continues without interruption, even if external radiation is present. External radiation is detected due to its different energy. The detector then changes to a second measuring channel and continues the measurement without error. This patented process makes the system particularly reliable. RID has been field tested for many years. In the new LB 470 series, operation has been made significantly more user-friendly for RID, making system calibration much easier. More information

Berthold Technologies has published the whitepaper “Managing Interference Radiation in Nucleonic Level Measurements”, wherein the common sources of interference radiation is identified and how affects nucleonic measurements is explained. The paper elaborates on how Berthold with its highly sophisticated RID feature helps plant operators to maintain a reliable and repeatable measurement. It can be downloaded here

Does the gas pressure in your vessel change?

Level measurement on vesselIn the case of radiometric measurement, this can falsify the measured value, unless you have a gas density compensation from Berthold Technologies. With the feature GPC (Gas Property Compensation), a second measurement determines the current gas density in the tank and has a compensating effect on the connected level measurement. Thus, a level measurement is realized, which provides an unaltered measured value even with fluctuations in the gas density.




CrystalSENS Detector

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

UniSENS Detector

Rod detector with a sensitive detector length of 0.5 up to 2.0m for level and interface measurements.

SuperSENS Detector

Best sensitivity on the market, is able to work with smallest source activities.
DuoSeries LB 470

Operating data

Power supply

100 ... 240 VAC ±10 %, 50 ... 60 Hz, 22 VA (Master) or 6 VA (Slave)
24 VDC (21 ... 32 VDC), 15 W (Master) and/or 5 W (Slave)

Ambient temperature
Operation: -20 ... +50°C (-4 ... +122°F), wall housing max. 40°C
No condensation for operation and storage

Master: 19" module 3HE, 21TE, IP 20
Slave: 19" module 3HE, 7TE, IP 20

ProcessorDual Core CPU 


Wall housing (IP65) or 19" frame


Detector operating

Power supplySupplied by evaluation unit via 2-wire signal cable 
Cable connections1x M16 for cable 4 ... 9 mm
1x M12 for cable 3 ... 6 mm
Maximum cable lengthWith Berthold cable ID no. 32024, LiYCY-OZ 2 x 1 mm2: 100m
Other cables: max. 40 Ω
For intrinsically safe installations: L & C to be considered according to certificate
Wire cross-section0.75 ... 2.5 mm2 
Housing materialStainless steel ISO 1.4301 / AISI 304 (others upon request) 
Water coolingOption (can also be retrofitted), max. 6 bar 
CascadingUp to 17 detectors 
 Scintillator size      Weight   Weight with   
Ø x length [mm]     [kg]        cooling system [kg] Collimator
(point detectors)
50 x 50 (Nal/TI)         9             12                                Option
50 x 60 (Polymer)      9             12                                Option
(rod detectors)
50 x 500 (Polymer)    13           19                                Option
50 x 1000 (Polymer)  17           27                                Option
50 x 1500 (Polymer)  23           36                                Option
50 x 2000 (Polymer)  27           43                                Option

Ambient temperature
Operation and storage

-40 ... +60  °C (-40 ... +140 °F)
Beyond degrees of -20 ... +60 °C the cable gland kit for extended
temperature ranges is required (metallic fittings)
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 protectionIP66 / IP67 
Explosion protection

II 2 G Ex db eb IIC T1-T5 (T6)    -40 ... +80 °C (+75 °C)
II 2 G Ex db [ib] IIC T1-T5 (T6)   -40 ... +80 °C (+75 °C)
II 2 D Ex tb IIC T85°C                -40 ... +80 °C
II 2 D Ex tb [ib] IIIC T85°C         -40 ... +80 °C


Other certificates

according to Class Division (CSA) and Zones

Vibration / Shock

IEC 60068-2-27: mechanical Shock; IEC 60068-2-6: Vibration;
IEC 60068-2-38: Climate test; IEC 60068-2-14 NA: Temperature shock

Cable Galnd Kit for
Advanced Temperature Range

Metal Cable Glands
-40 ... +60 °C (-40 ... +140 °F)
With water cooling: -40 ... +100 °C (-40 ... +212 °F)

Detector Service ModemFor operation via PC 

Signal inputs and outputs


Signal output

4 ... 20 mA, potential-free / max. impedance 500 Ω


Digital inputs

2 inputs, configurable for hold, external adjust


Digital outputs

1 relay (SPDT) for failure signal
2 relays (SPDT and SPST) for min./max. alarm, detector temperature
and further alarm functions
Permissible load at ohmic load: Max. 33VAC, 46VDC, max. 1A 



USB (for software update, data backup, keyboard, mouse)
RS 485 (for Master-Master communication)
Ethernet (for remote access)


Data backup

internally: in non-volatile memory
externally: USB memory 


Menu languages

English, German, French, Spanish, Italian, Portuguese, Russian, Chinese, Korean, Finnish, Serbian, Rumania, Bulgarian, others upon request


- Diagnostics according to Namur NE-107
- Event log, change log, and data log
- Dynamic adjustment of time constants
- Calibration adjustment: Automatic adjustment of the calibration curve
- X-ray interference protection (XIP)
- Automatic warning source exchange



Format Size
Level Measurement Russian language en PDF 2.3 MB
Level Measurement Brochure en PDF 4.85 MB
Format Size
LB 4700 ATEX en PDF 2.27 MB
LB 4700 CE Conformity-Ex en PDF 1.08 MB
LB 4700 CE-Conformity Non-Ex en PDF 1.01 MB
LB 4700 IECEX Certificate de, en PDF 1.23 MB
LB 4700 NEC-CEC Divisions+Zones Hazloc Certificate de, en PDF 154.82 KB
LB 4700 NEC-CEC LV+-EMC Ortloc Certificate de, en PDF 159 KB
LB 47x DuoSeries Wall Housing US+CSA de, en PDF 131.37 KB
LB 47x DuoXpert CE-Conformity CE20028-2 de, en PDF 240.18 KB
LB 47x UL CSA Certificate en PDF 130.71 KB
Operation Manual
Format Size
LB 470 Level en PDF 16.88 MB
LB 4700 Detectors en PDF 11.22 MB
LB 470RID Level en PDF 15.09 MB
Press & Media
Format Size
No half measures Published by Hydrocarbon Engineering, June 2017 by G. Webb. This article discusses the advantages of radiometric level measurements, also known as nuclear, measurement techniques. en PDF 1.74 MB
Product Information
Format Size
Gas Property Compensation for Level Measurements en PDF 1.99 MB
Managing Interference Radiation in Nucleonic Level Measurements Whitepaper de, en PDF 385.95 KB
Project Questionnaire
Format Size
Level en PDF 105.49 KB
Software Tool
Format Size
FlashLoader for Software Update de, en ZIP 2.97 MB
LB 470 DuoSeries Measuring Unit Software Update Version 1.5.0 de, en ZIP 525 KB
LB 4700 DuoSeries Embedded Software Update Version: 12.06.12 de, en ZIP 250.03 KB
LB 4700 DuoSeries PC-Program for Service Modem Version 1.0.3 (compatible with embedded 12.06.12) de, en ZIP 1.84 MB
LB 470RID DuoSeries Measuring Unit Software Update Version: 1.5.0 de, en ZIP 1.17 MB
LB 47x Control Unit Software Update Version: 1.5.0 de, en ZIP 2.95 MB
Windows Remote Control for castXpert LB 452 and DuoSeries LB 47x de, en ZIP 367.01 KB
Technical Information
Format Size
LB 470 Level/Füllstand TI de, en PDF 4.55 MB
LB 4700 Detector/Detektor TI de, en PDF 2.24 MB