Interactive Catalog Replaces Catalog Pages
Sensing and Control
Honeywell Inc.
11 West Spring Street
Freeport, Illinois 61032
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Solid State Sensors MG Series
Magnets
Honeywell1SensingandControl11-800-537-6945USA1F1-815-235-6847International11-800-737-3360Canada25
GENERAL INFORMATION
Several bar and ring magnets for actuat-
ing Hall effect sensors are available from
MICRO SWITCH. Bar magnets, in various
sizes and strengths, are ideal for sensors
with unipolar magnetic characteristics.
The ring magnets, with alternate South
and North poles on the outside diameter,
are especially useful for sensors with bi-
polar magnetic characteristics. (For more
information on magnets and methods of
magnet actuation, see Application Data.)
FEATURES
1
Wide variety of sizes and shapes
1
Wide variety of magnetic materials
1
Threaded bushings available on
some listings for easy installation
MOUNTING DIMENSIONS (for reference only)
101MG3 101MG2L1 101MG7
102MG11 102MG15 103MG5 103MG6
103MG8 105MG5R2 106MG10 107MG1
Analog
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Solid State Sensors MG Series
Magnets
26Honeywell1SensingandControl11-800-537-6945USA1F1-815-235-6847International11-800-737-3360Canada
MG ORDER GUIDE — BAR MAGNETS
Catalog Listings 101MG3 101MG7* 101MG2L1* 102MG11* 102MG15* 103MG5** 103MG6*** 103MG8 106MG10* 107MG1
Outside Diameter 6,3 6,3 3,2 7,9 7,9 2,0 2,0 5,6 10,2 15/32-32
0.25 0.25 0.125 0.31 0.31 .078 .080 .220 0.40 UNS21
Length 31,7 6,3 9,5 17,0 12,2 2,0 3,1 5,6 23,6 25,4
1.25 0.25 0.375 0.67 .48 .078 .120 .220 0.93 1.00
* Bulk packaging in 100 unit lots. Add -BP to catalog listing.
** 125 pieces per tube. Poles not marked.
*** 75 pieces per tube. Poles not marked.
MG ORDER GUIDE — RING MAGNETS
Catalog Listings 105MG5R2 105MG5R4
Outside Diameter 15,9 15,9
0.625 0.625
# Pole Pairs 2 4
MAGNET SELECTION GUIDE
This guide is designed to aid in determin-
ing the best magnet for use with a Hall
effect sensor. There are several factors to
consider when choosing a magnet. The
most important is gap distances. There
must be adequate magnetic gauss to op-
erate the sensor at the correct distance.
By using the maximum operate magnetic
gauss characteristics (see sensor order
guides), you can determine which mag-
net(s) will operate the sensor. Other im-
portant factors include temperature
range and the physical environment of
the application.
Gap Distance** & Gauss Level @ 25°C†
Material Magnetic Resistance
and Physical Temperature Shock To 0,25 0,76 1,27 2,54 3,81 5,08 Catalog
Process Strength Range* Resistance Demagnetization .010 .030 .050 .100 .150 .200 Listing
Alnico V Good –40 to 300°C Poor Fair 1460 1320 1170 810 575 420 101MG3
Cast
Alnico VIII Good –40 to 250°C Good Excellent 1050 900 755 470 295 195 101MG7
Sintered –40 to 140°C102MG11
–40to140°C102MG15
7800 7800 7800 750 550 375 107MG1***
Alnico VI Good –40 to 250°C Good Good 730 550 410 205 115 75 101MG2L1
Sintered
Indox 1 Good 0 to 100°C Good Excellent 700 520 375 175 85 45 105MG5R2
Pressed 105MG5R4
Rare Earth Poor –40 to 250°C Good Excellent 1110 630 365 120 55 25 103MG5
Pressed 2900 1400 850 260 130 70 103MG6
2620 2100 1600 940 550 350 103MG8
2620 2100 1600 940 550 350 106MG10
* Magnet will not be damaged over temperature range.
** Gap distance from sensing surface.
*** Measurement device saturated @ 800 gauss.
†milliTesla =Gauss ×10-1
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