Density Transmitter DuoSeries LB 474

Proven 2-wire technology with leading-edge functions

DuoSeries LB 474 is the new radiometric density system from Berthold based on real 2 wire technology, succeeding and compatible to our top-selling density measurement system LB 444. Like its predecessor model, the measuring system DuoSeries stands out by a particularly excellent performance with high accuracy and repeatability of density. Due to its outstanding performance the DuoSeries is the preferred choice when processes are demanding and 2-wire based control room technology is required.

Measuring principle density measurement

The DuoSeries density measuring system consists of a scintillation detector – CrystalSENS point detector – and a sophisticated transmitter unit for display and operation. The density transmitter is a state-of-the-art control unit with robust 3.5” TFT touch panel, powerful Dual Core CPU, up to 4 calibration curves, compensation of product temperature variations via PT100 connected to detector or analog current input and diverse operator interfaces. The calibration parameters can be exported via the USB port and can be easily imported to devices at other measuring tags. 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 474 - Your advantages at a glance:

  • Unique: Radiometric density measurement with intrinsically safe power supply (full Ex-i)
  • Ideal for all standard applications, but also for tricky measuring tasks
  • Easy, intuitive operation via touch-screen
  • Important maintenance-oriented diagnostic functions and self-monitoring
  • Compatible with the previous model
  • All contemporary Ex-approvals
  • Mass Flow evaluation




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.
DuoSeries LB 474

Operating data

Power supply

100 ... 240 VAC ±10 %, 50 ... 60 Hz, 30 VA
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

19" module 3RU, 21HU, protection IP 20

ProcessorDual Core CPU


In wall-mounted cabinet (up to 2 units)
In 19" rack (up to 4 units)
Other options available on request


Other certificates

NRTL according to UL/CSA approval

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 high/low PV alarm, detector
temperature or others
Permissible ohmic load: Max. 30V 1A AC/DC

Analog inputs

4 ... 20 mA, for temperature compensation


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

Data backup

internally: in non-volatile memory
externally: USB memory device


Menu languages

English, German, French, Chinese, Russian, Portugese, Italian,
others on request


- Up to 4 calibration curves
- Compensation of product temperature variations
  PT100 connected to detector or analog input) 
- Dynamic adjustment of time constant
- Radiation Interference Detection
- Automatically generated message for pending source exchange
- Diagnostics according to Namur NE-107 with event log, change log, data log


Format Size
Densidad y Concentracion solidos Spanish language en PDF 2.65 MB
Density Measurement Russian language en PDF 2.51 MB
Density measurement - system overview en PDF 1.57 MB
DuoSeries Detectors LB 4700 Flyer en PDF 1.44 MB
DuoSeries LB 474 en PDF 1.57 MB
Medicao de Densidade e Concentracao Portuguese language en PDF 2.81 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
DuoSeries LB 474 en PDF 15.28 MB
Project Questionnaire
Format Size
Density en PDF 104.6 KB
Density Portugiese Language en PDF 500.16 KB
Software Tool
Format Size
FlashLoader for Software Update de, en ZIP 2.97 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 474 DuoSeries Measuring Unit Software Update Version: 1.5.0 de, en ZIP 551.09 KB
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
TI 4700 DuoSeries de, en PDF 3.45 MB
TI 474 DuoSeries de, en PDF 5.22 MB