LB 124 SCINT-300 contamination monitor for α- and β-γ-Measurement

The contamination monitor LB 124 SCINT–300 is a versatile and flexible instrument for practical radiation protection. The Detector is based on innovative scintillation technology and has a big sensitive area of 345 cm². The LB 124 SCINT–300 can be employed wherever contamination caused by radioactive substances is encountered and has to be monitored. It is used to measure radioactive alpha and beta-gamma contaminations on surfaces such as floors, walls, desks, objects, clothing or skin.

Tabs

Features

The benefits of the LB 124 SCINT–300 are:

  • Simultaneous and separate measurement of alpha and beta-gamma radiation
  • High sensitivity and uniform response
  • No counting gas required
  • Leightweight, easy to handle and rugged instrument
  • Wide temperature range
  • Extremely large sensitive area
  • Calibration factors for more than 50 nuclides
  • Calibration selectable according to ISO 7503-1 or related to activity on 100 cm2 area
  • Protective grid with high transmission
  • Adjustable alarm thresholds
  • Acoustic alarm
  • RS232 Interface
Details

The contamination monitor LB 124 SCINT – 300 is a portable battery-powered instrument. It is compromised of a display unit with microprocessor electronics, a signal processing electronics and a new type of ZnSscintillator with photomultiplier and a large active measurement area of 345 cm2. Its sophisticated reflector geometry ensures that the response is extremely flat over the entire sensitive area. The large area supports faster measurements with lower effort and increase safety.

Functions
The LB 124 SCINT – 300 has an attractive and ergonomic design and due to its low weight it is easy to handle. Even under adverse conditions, the measured results can be read easily on a large high-resolution display with background lighting.

A few directly accessible function keys suffice to operate the LB 124 SCINT–300. The instrument’s surfaces can be easily decontaminated. Different user profiles with different levels of complexity and access rights can be selected: Less experienced users may use the instrument as a simple, clearly structured system. For experienced users the software offers numerous functions and utilities, measurement modes and access to all parameters. Profiles can be configured password-protected and are pre-defined as EASY, STANDARD and EXPERT. The instrument has a large data memory and supports bi-directional communication via RS232. Program download and data transfer to a PC or printer are possible.

Specifications

 

Instrument
Display                      Monochrome LCD 192 x 64 pixel
Electro-luminescence illumination
Radiation detectorZnS: Ag scintillator
Detection of lightPhotomultiplier (PMT)
Measurement modesα- and β-γ-measurement, simultaneous and separate, ratemeter, scaler-timer-mode, clearance measurement, half-life measurement, survey mode
Entrance window’s dimensions 150 mm × 230 mm
Sensitive area345 cm2
Entrance window’s material6 μm Plastic metallized (0.4 mg/cm2)
Protective Grid80 % Transmission
External dimensions260 mm × 178 mm × 150 mm (L x W x H)
Weight1750 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)

 

Sensitivity
Efficiency (related to the activity of a source with an area of 100 cm2)
14C12 %(β-γ-channel)
36Cl44 %(β-γ-channel) 
60Co29 %(β-γ-channel) 
137Cs44 %(β-γ-channel) 
241Am22 %(α-channel) 
Backgroundapprox. 0.1 cps
approx. 15 cps
(α-channel)
(β-γ-channel)
Gamma sensitivity
at 1 µSv/h (137Cs)
not detectable
< 100 cps
(α-channel)
(β-γ-channel) 
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
(α-channel)
(β-γ-channel)
Overrange indicationat rates
> 50.000 cps
 
Suface response
uniformity                           
max. ± 20 %           
 
(α-channel with 241Am, β-γ-channel with 14C point sources)

 

Accessories
Order Information & Accessories                                                          Ident. No.
Contamination MonitorLB 124 SCINT-30048002

Test source

 

200 Bq 90Sr

800 Bq 241Am

41872

46611

Aluminum caseLB 124/300-KB49700
Power supplyMultirange58067
Wall bracketfor LB 124 SCINT - 30051374
Additional protection gridfor LB 124 SCINT - 30049048
Data cableD-Sub cable 3 m26204
Rechargeable batteries3 x NiMH 1.2V/4.5 AH40650
Floor trolleyfor 1 x  LB 124 SCINT - 30049826
Floor trolleyfor 2 x  LB 124 SCINT - 30056356
Floor trolleyfor 3 x  LB 124 SCINT - 30056946

 

Applications

The contamination monitor LB 124 SCINT–300 is a versatile and flexible instrument for practical radiation protection. It can be employed wherever contamination caused by radioactive substances is encountered and has to be monitored:

  • nuclear medicine
  • research
  • nuclear power plants
  • decommissioning of nuclear facilities
  • disposal of nuclear waste
  • environmental monitoring

The instrument is used to measure radioactive alpha and beta-gamma contaminations on surfaces such as floors, walls, desks, objects, clothing or skin.

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Brochure
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LB 124 SCINT-300 en PDF 218 KB