Level Transmitter DuoSeries LB 470

DuoSeries LB 470 is the radiometric level system from Berthold based on real 2 wire technology succeeding our top-selling level transmitter LB 440. Like its predecessor model, the measuring system DuoSeries stands out by a particularly excellent performance with high accuracy and repeatability of level. Due to its outstanding performance the DuoSeries is the preferred choice when processes are demanding and 2-wire based control room technology is required.

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.



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.
DuoSeries LB 470

Operating data

Power supply

100 ... 240 VAC ±10 %, 50 ... 60 Hz, 30 VA (Master) or 15 VA (Slave)
24 VDC (18 ... 30 VDC), 30 W

Ambient temperature
Operation: -20 ... +60°C (-4 ... +140°F), no condensation
Storage: -20 ... +85°C (-4 ... +185°F), no condensation

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

ProcessorDual Core CPU


In wall-mounted cabinet  (2x Master or 1x Master + 3x Slave)
In 19" rack (4x Master or 2x Master + 6x Slave)
further assemblies on request

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 event
2 relays (SPDT and SPST) for min./max. alarm, detector temperature
or others
Permissible ohmic load: Max. 30V 1A AC/DC


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 device


Menu languages

English, German others on request


- Gas Properties Compensation
- Dynamic adjustment of time constant
- Calibration Adjust: Automatic adjustment of calibration
- Radiation Interference Detection
- Automatically generated message for pending source
- Diagnostics according to Namur NE-107 with event log,
  change log, data log


Format Size
DuoSeries Detectors LB 4700 Flyer en PDF 1.44 MB
DuoSeries LB 470 Flyer en PDF 148.39 KB
Level Measurement Brochure en PDF 4.85 MB
Format Size
ATEX LB 4700 en PDF 1.33 MB
IECEx LB 4700 en PDF 1.39 MB
LB 4700 CE-Conformity CE20027-2 de, en PDF 467.87 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
DuoSeries LB 4700 en PDF 3.09 MB
LB 47x en PDF 16.88 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
Project Questionnaire
Format Size
Continuous Level en PDF 110.01 KB
Software Tool
Format Size
FlashLoader for Software Update de, en ZIP 2.97 MB
LB 470 DuoSeries Measuring Unit Software Update Version 1.4.0 de, en ZIP 12.09 MB
LB 4700 DuoSeries Embedded Software Update Version: 12.06.11 de, en ZIP 246.48 KB
LB 4700 DuoSeries PC-Program for Service Modem Version 1.0.2 (compatible with embedded 12.06.11) de, en ZIP 2.96 MB
LB 47x Control Unit Software Update Version 1.4.1 de, en ZIP 11.59 MB
Windows Remote Control for castXpert LB 452 and DuoSeries LB 47x de, en ZIP 367.01 KB
Technical Information
Format Size
TI 470 DuoSeries de, en PDF 4.64 MB
TI 4700 DuoSeries de, en PDF 3.45 MB