REVIEW CDV-715 equivalent PDRM-82 (Superior to the 715)

The PDRM-82 which costs about 80-90 dollars imported from the UK is the superior replacement option for the CDV-715s with their aging circuits and risk of failure in the field due to sudden component test and no real self test option for failsafe reliability.

Even if you calibrate a CDV-715, there is no guarantee it will work in the event of an actual nuclear war event.

#1 The units have components that are aging and subject to drift etc..

#2 No real selftest. The circuit check does not mean an operational item. Just because it passes it does not mean it is working.

#3 shaky needle. just move it around and you will see.

The PDRM-82 was developed by Plessey Controls in the 1980s. The unit designed for several objectives. #1 simple operation, EMP resistant electronics, Failsafe self test, resistance to elements, easy to read.

#1 The electronics consist of EMP resistant components and ceramic chips to insure survivability during the detonation of high altitude nuclear weapons. (Typically the first salvo consists of high altitude detonations to disable electronic devices over the area of interest)

The components are modern higher quality stable components compared to the CDV-715

#2 The PDRM-82 has a selftest system that is composed of a circuit check and then a GM tube calibration check. Inside the Unit there is a small beta emitter source sealed with the tube, it consists of Chlorine 36 which has a half life of 300,000 years.

On power up once the circuit check is complete, the unit will then do a CPM check with the CL-36 source to make sure it matches the factory PROM setting. Once this is complete the unit will no longer display test and will then display 0.0 If it does not it will display FAIL and you know the unit is useless and can be disposed of.

The Readout is an easy to read LCD that measures in centigreys which is the absorbed dose reading.

So 0.1 centigrey is 1 millisievert dose equivalent

So at the Fukishima site area this unit would be displaying 0.01 (1 mSv) [not inside the plant area]

The people living around Chernobyl in 1986 would have seen 3.50 (350 mSv) if they had this unit.

A reading of 10.0 on this unit would mean you would be subject to acute non fatal radiations sickness (10 being 1,000 mSv)

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REVIEW CDV-715 equivalent PDRM-82 (Superior to the 715)