GAMMAcast Radiometric Mold Level Gauge

The radiometric mold level measurement is maintenance-free and applicable for different mold types. Successful applications can also be found in Beam Blank and Round casters. Although working under extreme temperatures and harsh environmental conditions, the measurement has proven to be reliable for many years of operation.

System characteristics

  • Highest reliability
  • Virtually unlimited measuring range
  • Very robust
  • Applicable for all mold types
  • Easy calibration
  • Minimum source activity due to high-sensitive detectors
  • Maintenance-free
  • Constantly high accuracy over the whole measurement range

Measuring Principle

Gamma radiation is attenuated as it passes through the mold. This attenuation is measured by a detector. The extent to which the radiation is attenuated depends on the mold level. The higher the level of molten metal in the mold, the less radiation will reach the detector. In this manner, the mold level can be reliably monitored - irrespective of dust, temperature and vibrations.

GAMMAcast Detectors

GAMMAcast detectors are characterized by their excellent sensitivity for gamma radiation, leading to a significant reduction of source size. The new robust detector design and the PlugProtect cable connection ensure highest mechanical stability and an extended lifetime.

Activity Optimized Source (AOS)

The Activity Optimized Source allows for an enhanced measuring performance. By modifying the activity distribution along the source the accuracy around the set point can be significantly improved.
Alternatively, when the accuracy is to remain unchanged, the source activity can be reduced by several factors. This allows for the use of smaller shieldings, which is a major benefit in terms of space and costs. In individual cases it is also possible to work with the significantly more cost-efficient lead as shielding material.




GAMMAcast LB 6739, LB 6760 and LB 6752




Stainless steel


LB 6739: CsI-crystal; Ø 40 mm or Ø 25 mm, H: 50 mm

LB 6760: NaI-crystal; Ø 40 mm, H: 50 mmLB 6752: Organic polymer scintillator, 150x100x50 mm3 or 150x100x25 mm3


Operation:    LB 6739 and LB 6752:       -20…+500C (-4…+1220F)
                     LB 6760:                            -20…+600C (-4…+1400F)

Cooling water required at higher temperatures


15.32 VDC, approx. 1.2 W

Output signal

Pulses, max. 10 V

Water cooling

Optional for LB 6739 and LB 6760, Standard for LB 6752

Connection: R1/4, max. 6 bar

Drinking water quality (or filtered process water without suspended particles)

IP class

IP 66 / IP 67


Detector - terminal box resp. detector - castXpert LB 452

Special cable with PlugProtect connector; straight or 90°-angled connector plus open ends or HeavyCon plug

Terminal box – castXpert LB 452:

6-wired, screened (6 x 1.5 mm2)

max. length 500 m


LB 6739 / LB 6760: approx. 2 kg, with water cooling approx. 3 kg

LB 6752: approx. 2 kg


Vibration: 0.2 g / mechanical shock: 100 g

according to DIN EN 60086-2-6 and 60068-2-27


Format Size
Flyer AOS Activity Optimized Source en PDF 500.37 KB
Flyer Radiometric Detector CONGAUGE LB 6755 de, en PDF 748.24 KB
Mold Level Measurement en PDF 1.01 MB
Operation Manual
Format Size
GAMMAcast detectors LB 67xx /LB 6760 en PDF 4.23 MB
LB 452 castXpert en PDF 4.55 MB
Software Tool
Format Size
FlashLoader for Software Update de, en ZIP 2.97 MB
GAMMAcast LB 6739 and LB 6752, Embedded Software Version 1.03.00 de, en ZIP 195.82 KB
GAMMAcast LB 6739 and LB 6752, PC Software Version 01.03.00 de, en ZIP 3.9 MB
GAMMAcast LB 6760 PC Software Version 1.00.03 de, en ZIP 2.6 MB
GAMMAcast LB 6760 PC, Embedded Software Version 01.00.03 de, en ZIP 235.29 KB
RS 485 Connector (driver for the modem) de, en ZIP 1.59 MB
Technical Information
Format Size
LB 452 castXpert and GAMMAcast detectors en PDF 2.48 MB