Highlights
General
Measuring of 137Cs in liquids and bulk goods by a 25 mm Ø × 25 Nal(TI) Crystal.
Through the attributes of the device a low detection limit of 20 Bq/l (t = 1 h) can be achieved.
Features
- 40K suppression by implementing a second energy window.
- The LB 201 can be operated as a stationary or a mobile device and is thus flexible for your application.
More features
- The evaluation unit of the LB 201 can display the measurement results in cps, Bq/kg and Bq/l, associated with a time stamp.
- Sophisticated PC software tailored for your LB 201 helps you create protocols and manage measurements.
- The LB 201 is calibrated by the manufacturer and can be checked annually using the optional calibration source.
Product Overview
The LB 201 comes with a tailored aluminum case in which all the device parts find space.
Thanks to the modular design consisting of two separate units, the LB 201 adapts perfectly to your workplace.
Therefore, the transport and the flexible application of the LB 201 is ensured.
The use of a Marinelli sample cup ensures a consistent measuring geometry. The plastic cup is ready for food samples, liquids and smaller bulk goods.
The automatic 40K suppression helps with achieving a more reliable result. A second energy window is implemented in order to subtract the influence of the high energy gamma emitter from the measurement result.
Technical Data
| Type | NaI(Tl) Crystal 25 mm Ø x 25 mm |
| Probe | with built-in threshold amplifier and high-voltage generator |
| Operating Voltage | 5 VDC ±5 % |
| Max. current consumption | 1.5 A |
| Dimensions | Electronics housing (120 mm × 120 mm) |
| Temperature range | Storage: –20 to 55 °C Operation: 5 to 40 °C Transport: –20 to 55 °C |
| Rel. humidity | 10 to 85 %, non-condensing |
| Maximum tolerable temperature change | +10 °C/h, –8 °C/h |
| Altitude | Max. 2000 m above sea level |
| Protection | IP 55 |
Protection class | III |
| Weight | approx. 0.8 kg (without lead shielding) |
| Lead Shielding | |
| Dimensions (H × Ø) | approx. 130 mm × 136 mm |
| Weight | approx. 8 kg |
| Measuring beaker | Plastic, useable volume 0.5 L (H × Ø) approx. 99 mm × 114 mm |
| Display | Monochrome LCD 192 x 64 pixels Electro-luminescent lighting |
| Keyboard | Membrane keyboard, 6 buttons, 4 soft keys, 1 × device on/off, 1 × sound/LCD lighting on/off 2 LEDs for alarm display and function control |
| Data storage | 2400 measured values with date and time |
| Dimensions | 200 × 400 × 300 (L × B × H in mm) |
| Weight | 1400 g (including batteries) |
| Operation temperature range | –20 °C to +40 °C |
| Storage temperature range | –20 °C to +55 °C |
| Rel. Humidity | 10 % to 85 % (non-condensing) |
| External pressure | 500 hPa to 1300 hPa (in operation) |
| Communication | USB (1 device, 1 Host for Memorystick), RS 485 |
| Alarms | Acoustic: Piezo oscillator 2.5 to 3 kHz alarm as an interrupted continuous tone, single pulse (switchable) as tone burst |
| Warnings | LED signals when threshold values are exceeded or function display. Text messages in the display for exceeding the measuring range and detector failure. |
| Instrument | |
| 59974 | Becquerel Monitor LB 201, incl. 1 × marinelli beaker 0.5 l, 1 × aluminium transport case, PC software set and device stand |
| Accessories | |
| 8533 | 1 × Marinelli sample beaker, plastic, useable volume 0.5 l |
| 71872 | 10 × Marinelli sample beaker, plastic, useable volume 0.5 l |
| 14324 | Calibration source (nuclide: 137Cs) |