Block of detection BDZB-100B is intended for measuring the level of pollution of surfaces polluted by beta- active substances.
Output signal is a sequence of normalized, statistically distributed pulses, contains measurable data about density value(specific surface activity)of the flow of beta radiation where the block is located.
| Area of the detector sensitive surface, cm2 |
80,0 |
| Sensitivity*,· |
(0,6±0,09) imp·s-1for1 min-1∙cm -2 |
| Energy range of the registered beta-emission, MeV |
From 0,3 to 3,5 |
| Registration efficiency (2π)*, % |
60,0 |
| Own background, s-1 |
No more than 2 |
| Type of the detector |
Geiger-Muller Counter,Beta-5, 2 psc |
| Upper limit of measurement (with devices, produced by ZAO “Tetra”)— density of beta-emission flow*, min-1∙sm-2;
— specific service activity*, Bk·sm-2 |
2,0·106; 6,67·104 (doubled numerical value of the flow density, in s-1 • cm-2) |
| Upper limit of measurement (with other devices)— density of beta-emission flow*, min-1∙sm-2;
— specific service activity*, Bk·sm-2 |
2,0·104; 666,7 |
| Overall dimensions, mm |
210х150х50 |
| Mass, kg |
1,0 |
| Connecting cable length, m |
1,5 м |
| Note* – emission of 90Sr+90Y radionuclides | |
As the detection unit is equipped with a built-in object presence sensor, it greatly reduces the possibility of false operations while measuring the level of surface pollution.
ELECTRICAL CHARACTERISTICS
Power supply – DC voltage from 7,0 to 12,6 v. The consumed current is not more than 30 mA.
Designation of the joint contacts (plug RS -10) of the block is shown at the table.
 |
contact |
Signal designation |
commentaries |
| 1 | + Uп | 7,0 – 12,6 V | |
| 4 | “Gamma”Output | positive square-wave pulses with an amplitude of about 5 V, duration (1,5 ± 0,5) mks; | |
| 5 | Sensor output | Sensor of the object presence | |
| 9 | ┴ | Screen, connected to contact 10 | |
| 10 | ┴ | General, connected to contact 9 |
