Activation Distances for R3S Miniature Reed Sensors

Operate and release distances for the R3S miniature SMD reed sensor in the three standard AT bands when actuated (as shown in the sketches) with NdFeB standard magnets is shown below. All distances given are in mm with tolerances of ±0.5mm. Although some of the AT band / magnet combinations will produce similar actuating distances, selecting the right AT band and magnet for an application is important and can be done by going through our AT band FAQ and our magnet selection guide.

R3S-1 (10-15 AT)

Actuation Sketch	Magnet	Dimensions	Operate Distance	Release Distance
	NDR-T	4.0 x 1.5 x 1.5	2.5 - 4.5	3.0 - 5.0
	NDC-T	Ø2.0 x 4.0	3.5 - 5.5	4.0 - 6.0
	NDR-S	6.0 x 2.5 x 2.5	6.5 - 9.5	7.0 - 10.0
	NDC-S	Ø3.0 x 7.0	8.0 - 10.5	9.0 - 11.0
	NDR-M	8.0 x 3.0 x 3.0	9.5 - 12.0	10.5 - 13.0
	NDC-M	Ø4.0 x 10.0	12.0 - 16.0	13.0 - 14.0
	NDR-L	19.0 x 4.0 x 4.0	17.0 - 21.5	18.0 - 23.0
	NDC-L	Ø8.0 x 15.0	25.0 - 32.5	27.0 - 33.5

R3S-2 (15-20 AT)

Actuation Sketch	Magnet	Dimensions	Operate Distance	Release Distance
	NDR-T	4.0 x 1.5 x 1.5	2.0 - 3.0	3.0 - 4.0
	NDC-T	Ø2.0 x 4.0	2.5 - 3.5	3.5 - 5.0
	NDR-S	6.0 x 2.5 x 2.5	5.5 - 7.0	6.5 - 8.5
	NDC-S	Ø3.0 x 7.0	6.5 - 8.5	8.0 - 10.0
	NDR-M	8.0 x 3.0 x 3.0	8.0 - 10.0	10.0 - 12.0
	NDC-M	Ø4.0 x 10.0	10.0 - 12.5	12.0 - 14.0
	NDR-L	19.0 x 4.0 x 4.0	14.0 - 17.5	17.0 - 21.0
	NDC-L	Ø8.0 x 15.0	22.0 - 26.0	25.5 - 30.0

R3S-3 (20-25 AT)

Actuation Sketch	Magnet	Dimensions	Operate Distance	Release Distance
	NDR-T	4.0 x 1.5 x 1.5	1.0 - 2.0	2.0 - 2.5
	NDC-T	Ø2.0 x 4.0	1.5 - 2.5	2.0 - 3.0
	NDR-S	6.0 x 2.5 x 2.5	4.5 - 6.0	6.0 - 8.0
	NDC-S	Ø3.0 x 7.0	5.5 - 7.0	7.0 - 8.5
	NDR-M	8.0 x 3.0 x 3.0	7.0 - 9.0	9.0 - 11.0
	NDC-M	Ø4.0 x 10.0	9.5 - 11.0	11.0 - 14.0
	NDR-L	19.0 x 4.0 x 4.0	12.5 - 16.0	16.0 - 19.0
	NDC-L	Ø8.0 x 15.0	20.0 - 23.0	23.0 - 27.0

Ultra Miniature Miniature Standard NC Latching Miniature SIP Standard SIP Level Sensor Distances Crosslink Notes

Reed Relays and Electronics India Limited, 2008

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