S.E. International Inspector EXP Specifications download pdf (Page 22)

Chapter 11: Basics of Taking Measurements

The Inspector EXP will not detect neutron, microwave, RF (radio frequency), laser, infrared, or ultraviolet

radiaon. All of our instruments are most accurate for Cesium-137 and isotopes of similar energies. Some

isotopes detected relavely well by most Geiger counters are Cobalt-60, Technicium-99M, Phosphorous-32,

Stronum-90, and many forms of Radium, Plutonium, Uranium, and Thorium.

Some forms of radiaon are very dicult or impossible for a Geiger tube to detect. Trium, for example, is

a by-product of a nuclear reactor and is used in research. The beta emissions from Trium are so weak that

there are very few instruments that are capable of detecng it. More sophiscated equipment is needed for

the measurement of environmental samples, such as radioacvity in milk, produce, soil, etc., unless you are

looking for gross contaminaon.

The radiaon from some isotopes can cause a Geiger tube to overexcite and indicate a higher level of radiaon

than is actually present. Americium 241 is an example of this phenomenon. Americium 241 is used in some

smoke detectors and many dierent types of industrial density and ow meters.

Unless you know exactly what you are measuring and understand the limitaons of detecon instruments,

it is possible to draw misleading conclusions from your readings. We design our instruments to detect the

broadest range of ionizing radiaon possible and sll be aordable. The full spectrum of ionizing radiaon

cannot be measured by one single instrument. Everyone agrees that radioacve materials can be dangerous.

We encourage you to seek out other sources of informaon.

How to Detect Background Radiaon

To see what the background radiaon is in your area, simply turn the instrument on and, aer the 30 second

start up beep, the general background radiaon will be displayed.

How To Survey a Surface

When surveying a surface, such as a counter top, you will need to hold the Inspector EXP about 1-2

cenmeters from the surface while moving the unit horizontally across the survey area at a rate of 2 inches per

second.

How to Perform a General Survey

A general survey would be used to nd a potenal source. For example, if you are looking for a potenal

source in a pile of scrap, the Inspector EXP will typically detect about 2 feet into a pile. It is easier to nd a

source when the Inspector EXP is set to Fast Response mode. However, even if the Inspector EXP is in Auto-

Averaging mode, the audio clicks that indicate a count should be a sucient indicator if a potenal source is

present. To nd the source, slowly move the Inspector EXP in the direcon of the higher readings or clicks unl

the potenal source is found.

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S.E. International Inspector EXP Specifications Page 22