Bulk Flow Transmitter DuoSeries LB 472

The specialist for bulk flow measurements

The bulk flow system LB 472 is used for the precise determination of flowrate in the bulk industry and can be perfor­med on all kinds of conveyor systems. The non-contacting, non-intrusive radiometric belt weigher is characterized by an excellent accuracy and reliability. The DuoSeries Transmitter LB 472 is very robust with no moving parts and maintenance is not required.

The non-contacting belt scale LB 472 can be installed directly after bunkers, chute outlets or transfer systems. The belt scale LB 472 provides measuring results on the current flowrate and the totally produced mass

Intuitive operation

The DuoSeries Transmitter LB 472 provides a local display of measurement values as well as on-site operation via the integrated touch panel. Valuable dia­gnostic functions and self-monitoring ensure increased reliability and availability of the measurement. Users also benefit from new ser­vice features (e.g. data log), which can be accessed remotely, via Ethernet or USB interface. The menusare available in all common languages.


On request, we supply the components together with a special mounting frame for installation of the detector and shield. The robust steel fra­me is optimized in terms of radiation protection and stability and ensures a reliable measure­ment. By applying the optimal arrangement for different options of sources and detectors we find the best solution for our customers.




UniSENS Detector

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

CrystalSENS Detector

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


DuoSeries LB 472


Power supply
100 ... 240 VAC ±10 %, 50 ... 60 Hz, 22 VA (Master) or 6 VA (Slave)
24 VDC (18 ... 32 VDC), 15 W (Master) or 5 W (Slave)
Operation: -20 ... +50 °C (-4 ... +122 °F), cabinet max. 40 °C
Storage:    -20 ... +85 °C (-4 ... +185 °F)
No condensation for operation and storage

19” module 3 HE, 21 TE, protection type IP 20

InstallationIn wall-mounted cabinet or 19” rack



operating data


Power supply

Supplied by transmitter via 2-wire signal cable

Cable connections

1x M16 for cable 4 ... 9 mm
1x M12 for cable 3 ... 6 mm

Maximum cable

with Berthold cable ID no. 32024, LiYCY-OZ 2x1 mm2: 1000 m
Other cables: max. 40 Ω,
For intrinsically safe installations: L & C according to certificate.

Wire cross section

0.75 ... 2.5 mm²

Housing material

Stainless steel ISO 1.4301 / AISI 304 (others on request)

Water coolingOption (can also be retrofitted), max. 6 bar
 Scintillator size       Weight    Weight with        Collimator
Ø x length [mm]       [kg]       cooling system[kg]
(Point detectors)

50 x 50 NaI(Tl)             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
(operation and
–40 ... +60 °C (–40 ... +140 °F)
Observe possible temperature restrictions for explosion protection!
≤0,002%/°C (–40 ... +60 °C) with CrystalSENS or
≤0,01%/°C (–40 ... +60 °C) with UniSENS
approvals & tests
IP protectionIP 66 / IP 67


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 IIIC T85°C                            –40 ... +80 °C
II 2 D Ex tb [ib] IIIC T85°C                      –40 ... +80 °C

Other certificatesUS / Canada: according to Class Division (CSA) and Zones
Inputs and
Signal output0/4 ... 20 mA potential-free / max. impedance 500 Ω 
Digital input2 inputs, configurable for hold, external tare and product changeover
Analog inputPulse input or 0/4 ... 20 mA for speed signal
Digital outputs

1 relay (SPDT) for failure event
2 relays for mass counter, tare, hold, and other alarm functions
Load resistance at ohmic load: max. 30 VAC, 46 VDC, max. 1 A

Data backupin non-volatile memory

Menu languages

English, German, French, Spanish, Italian, Portuguese, Russian,
Chinese, Korean, Finish, Romanian, Serbian, Bulgarian
others on request


Set of cable
glands exp. 
temperature range
Cable glands made of metal
–40 ... +60 °C (–40 ... +140 °F)

With water cooling: –40 ... +100 °C (–40 ... +212 °F)

Detector Service
For operation via PC


Application Report
Format Size
Concentration Measurement for milk of lime en PDF 275.59 KB
Solution for Pulp and Paper Production Mass Flow, Density Measurement, Level and Moisture Measurement de, en PDF 1.37 MB
Format Size
Bulk Flow Measurement Russian Language en PDF 2.37 MB
LB 442 Mass Flow Measurement for pneumatically conveyed or free-falling bulk materials en PDF 757.18 KB
LB 472 en PDF 1.51 MB
LB 472 Portuguese Language en PDF
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
Operation Manual
Format Size
LB 4700 Detectors en PDF 11.22 MB
LB 472 Bulk Flow en PDF 18.73 MB
Product Information
Format Size
Frames for Bulk Flow Measurements en PDF 540.73 KB
Project Questionnaire
Format Size
Bulk Flow en PDF 2.35 MB
Bulk Flow en PDF 2.35 MB
Software Tool
Format Size
FlashLoader for Software Update de, en ZIP 2.97 MB
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 472 DuoSeries Measuring Unit Software Update Version: 1.5.0 de, en ZIP 529.74 KB
LB 47x Control Unit Software Update Version: 1.5.0 de, en ZIP 2.95 MB
Technical Information
Format Size
LB 4700 Detector/Detektor TI de, en PDF 2.24 MB
LB 472 Durchsatz/Bulk Flow TI de, en PDF 5.21 MB