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Portable radon monitor PRM 145

PRM 145 is a computerised instrument for monitoring the total alpha activity of radon 222Rn and its short-life products 218Po and 214Po.

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PRM 145 is a computerised instrument for monitoring the total alpha activity of radon 222Rn and its short-life products 218Po and 214Po. As soon as alpha particle, generated by the radioactive decay of radon or one of it’s products, hits the ZnS layer on the wall of the scintillation cell, a photon of visible light with the wavelength of approx. 600nm is emitted. Integrated photomultiplyer tube transforms light pulses into electric signals, which are further counted by the instrument (in fixed time or to the fixed count). PRM 145 calculates the concentration of radon in the sample (together with the uncertainty of the measurement), displays the results, and stores them in the data buffer.

PRM 145 has built-in library with all parameters of scintillation cells. It is possible to transfer data between different PRM 145 instruments, or between PRM 145 and external computer. Built-in printer port enables direct printout of data to the connected printer. PRM 145 is equipped with the real-time clock, so all measurements are labelled with a time-stamp.

PRM 145 consists of two parts, both stored in a portable case. Cylindrical part contains the photomultiplyer tube, high voltage power supply, signal conditioning, and container for the scintillation cell. Processor part contains microprocessor, battery, and interfaces. On the front plate, there are keyboard, on/off switches, optical indicator for the closed container, and 2-line back-lit alphanumerical LC display.

Product references

Power supply: 220-240V (AC), 50 W (Fuse 0,3A)  or: battery (sealed built-in accumulator 12V / 7,2 Ah)
Measuring ranges: maximum detectable pulse rate:  5000 imp/s (5 kHz) measuring range: 0,0 to 99.999,0 Bq m3
Dimensions: H 160mm, L 330mm, D 460mm
Weight: 10 kg
Acceptable dimensions of scintillation cells: Max. height: 215mm, Max. diameter: 90mm
Independence on the internal battery: min. 10 hours at fully loaded battery
Databases: Library  for  100  scintillation  cells  (background,  constant  1,  constant  2, identification No.)    50 measurements  (sequential  No. of measurement,  identification  No. of the scintillation cell, date and time of measurement, No. of repeated measurements /max. 20/, uncertainty of measurement, measuring result).

 

TitleDescriptionFilename
Leaflet PRM 145  PRM_145.pdf 
Manual PRM 145  PRM_145_Manual.pdf 

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Portable radon monitor PRM 145
PRM 145 Radon monitor
Portable radon monitor PRM 145
Portable radon monitor PRM 145