EVKT-KNOB – ROTARY KNOB KIT FOR THE MAGALPHA
The EVMA nominal magnet sensor distance is 1.5mm, providing a magnetic field of 75mT. With the
spacers, the field strength is reduced to 50mT or 25mT (see Table 7).
Table 7: Setting of the Air Gap
Spacer Thickness (mm)
Air Gap (mm)
Magnetic Field (mT)
None
0.7
2
1.5
2.2
3.5
75
50
25
Figure 15: Air Gap Setting
MAGNET SUPPLIERS
The table below shows a non-exhaustive list of possible magnet suppliers. The magnetization direction
must be chosen wisely given the fact that most magnets sold are often axially magnetized, which is not
a magnetization direction usually required in magnetic angle sensing applications. Angle sensing
applications usually use diametrically magnetized magnets.
Table 8: Magnet Suppliers
Company
Website
Address
Industriestrasse 8
8627 Grüningen
Switzerland
Maurer Magnetics AG
www.maurermagnetic.ch
Hübelacherstrasse 15
5242 Birr-Lupfig
Switzerland
Arnold Technologies AG
Bomatec AG
www.arnoldmagnetics.com
www.bomatec.com
Hofstrasse 1
8181 Höri
Switzerland
1050 Morse Avenue
Elk Grove Village, IL 60007-5110
USA
Dexter Magnetic Technologies
www.dextermag.com
8 LongWan Road
Jiangmen City
GuangDong Province
China
JPMF
www.jpmf.com.cn
Unit 612 Yuanzhong Building
No. 1905 Hongmei Road
Shanghai
Binicmagnet
www.binicmagnet.com
P. R. China 200233
Room 705, Tower A Century Holiday Plaza
9030 Shennan Rd
Nanshan District
Shenzhen
China Rare Earth Magnet
www.permanentmagnet.com
www.goudsmit-magnetics.nl
China
Petunialaan 19
5582 HA Waalre
Netherland
Goudsmit Magnetic Systems
dd
EVKT-KNOB
12/10/2018
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