LB 124 SCINT-D Contamination Monitor with Dose Rate Detector

The Contamination Monitor with Dose Rate Detector LB 124 SCINT-D is used to measure radioactive alpha and beta-gamma contaminations on surfaces such as floors, walls, desks, objects, clothing or skin as well as gamma dose rate in ambient dose rate equivalent H*(10).




  • Lightweight, easy to handle and rugged instrument
  • Wide temperature range

Contamination Detector

  • Simultaneous and separate measurement of alpha and beta-gamma contamination with a ZnS(Ag)-scintillation detector
  • High sensitivity and uniform response
  • No counting gas required

Dose Rate Detector

  • Detector positioned parallel to the front side of the instrument
  • Energy response to H*(10) Ambient Dose Equivalent
  • Halogen quenched Geiger-Müller tube
  • Dynamic Range: 0.1 μSv/h to 20 mSv/h
  • Energy Range: 50 keV to 1.3 MeV
  • Alarm threshold for dose rate measurement
  • Unit selection: μSv/h
  • Dose accumulation is possible

The Contamination Monitor LB 124 SCINT-D is a portable battery-powered instrument. It is comprised of a display unit with microprocessor electronics, a signal processing electronics and a new type of ZnS-scintillator with photomultiplier and an active measurement area of 170 cm². Its sophisticated reflector geometry ensures an extremely flat response over the entire sensitive area.

Through the integration of an additional Geiger-Müller tube it is possible to measure gamma dose rate simultaneous besides regular contamination measurement.

Due to its attractive and ergonomic design and its low weight the LB 124 SCINT-D is easy to handle. Even under adverse conditions, the measured results can be read easily on the large-highly-resolution display with background lightning.

A few directly accessible function keys suffice to operate the LB 124 SCINT-D. The instrument´s surface can be easily decontaminated.

Display                       Monochrome LCD 192 x 64 pixel
Electro-luminescence illumination
Radiation detectorZnS(Ag) scintillator
Detection of lightPhotomultiplier (PMT)
Measurement modes

α- and β-γ-measurement, simultaneous and separate,

additional gamma dose rate H*(10)

ratemeter, scaler-timer-mode, clearance measurement, half-life measurement, survey mode

Entrance window’s dimensions118 mm × 145 mm
Sensitive area170 cm²
Entrance window’s material2 x 3 μm Plastic metallized (0.4 mg/cm²)
Protective Grid80 % Transmission
External dimensions240 mm × 140 mm × 110 mm (L x W x H)
Weight1400 g (with batteries)
AlarmAcoustic with adjustable alarm thresholds
Data memory1000 measured values with date & time
Serial interfaceRS232
Power supply

3 × C size batteries LR14 alkaline 1.5 V or
NiMH (HR-14) batteries 1.2 V,
rechargeable by plug type power supply or alternatively in the wall mounting bracket

Max. operating time (without illumination)

> 50 h with alkaline batteries 7.8 Ah
> 25 h with NiMH batteries 4.5 Ah


Ambient Conditions
Temperature range-20 °C to +40 °C (operation)
-40 °C to +60 °C (storage)
Relative humidity0 % to 80 % (no condensation)
External pressure500 to 1300 hPa (operation)
100 to 1300 hPa (storage/transport)
Protection classIP 53 (according to IEC 60529)


Efficiency (related to ISO 7503-1)
Contamination Detector: 
241Am44 %(α-channel)
239Pu36 %(α-channel)
14C29 %(β-γ-channel)
36Cl69 %(β-γ-channel)
60Co58 %(β-γ-channel)
137Cs71 %(β-γ-channel)
Backgroundapprox. 0.1 cps
approx. 10 cps
Gamma sensitivity
at 1 µSv/h (137Cs)
not detectable
< 100 cps
Spillover< 20 %
< 2 x 10-5
(α- to β-γ-channel with 210Po)
(β-γ- to α-channel with 90Sr)
Measuring range
(Dead time < 10 %)
0 to 5.000 cps
0 to 50.000 cps
Overrange indicationat rates
> 50.000 cps
Suface response
max. ± 20 %          (α-channel with 241Am, β-γ-channel with 14C point sources)
Gamma Radiation Detector: 
Dose rate range0.1 µSv/h to 20 mSv/h
Energy range50 keV to 1.3 MeV
Calibration factor0.625 µSv/h per cps 137Cs
Intr. backgroundapprox. 0.07 cps


Order Information and AccessoriesIdent. No.
Contamination Montitor with DR DetectorLB 124 SCINT-D           60026

Test source


200 Bq 90Sr

800 Bq 241Am



Aluminum caseLB 124-KB38164
Power supplyMultirange58067
Wall bracketfor LB 124 SCINT38789
additional protection gridfor LB 124 SCINT45355
Data cableD-Sub cable 3 m26204
Rechargeable batteries3 x NiMH 1.2V/4.5 AH40650
Floor trolleyfor LB 124 SCINT41028
Sample holder with drawerfor LB 124 SCINT40927


  • Contamination monitor based on innovative scintillation technology
  • Additional Gamma Dose Rate Probe
  • Optional display of simultaneous α- and β-γ-contamination or display of α- or β-γ-contamination and gamma dose rate
Format Size
LB 124 SCINT Serie en PDF 323.16 KB

News about this product

Our newly developed contamination monitor with dose rate detector LB 124 SCINT-D is used to measure radioactive alpha and beta-gamma contaminations on surfaces well as gamma dose rate in ambient dose equivalent H*(10). Read more