493K K-METRON, User Instructions, Page: 12 / 29

K-METRON Radio User Instructions (Firmware 3.0.4; Doc v4.0)
11 | P a g e
5 CHOOSING THE CORRECT MAGNET
The unit comes with three different types of magnets, a cube, a 10mm sphere, and a 19mm
sphere. The desired range of measurement will be the major factor which will determine
whether to use the cube or spherical magnet. The 10mm x 10mm x 10mm cube magnet is
best for thick-walled parts (
> 4mm) . Since thick-walled parts are usually large a cord is
supplied to help retrieve the magnet should it become de-coupled from the sensor head.
The 10mm spherical magnet is best for thinner parts when tight radii are to be measured.
The measurement specifications for each of the magnets are shown in the Table below.
MEASUREMENT SPECIFICATIONS FOR CUBE AND SPHERICAL MAGNETS
METRIC Part thickness Accuracy
10mm cube
magnet 4mm – 20mm 4mm-17mm: +/- 0.2mm of reading
17mm +: +/- 1.0mm of reading
Factory Set
10mm sphere
magnet 2mm-20mm 2mm-13mm: +/- 0.2mm of reading
13mm: +/- 1.0mm of reading
19mm sphere
magnet 10mm -30mm 10mm – 20mm: +/- 0.2mm of reading
21mm: +/- 1.0mm of reading
IMPERIAL Part thickness Accuracy
0.39” cube
magnet
0.157” – 0.787” 0.157” – 0 .669”: +/ - 0.008” of reading
0.669”: +/ - 0.039” of reading
Factory Set
0.39” sphere
magnet
0.079” – 0.787” 0.079 ” – 0 .512”: +/ - 0.008” of reading
0.512”: +/ - 0.039” of reading
0.75” sphere
magnet
0.39” – 1.1811 ” 0.39 ” – 0.787 ”: +/ - 0.008” of reading
0.787 ”: +/ - 0.039” of reading