AMR Sensors (Magnetic Sensors)Selection Guide

AMR sensors by supported voltages and frequencies

Operation examples and product groups

Operation image examples

• Select the operation for the location where you want to use an AMR sensor from the "Operation image examples" below. The "Compatible product groups" on the right of the example image for this operation are AMR sensor candidates that can be used in the operation example.
• For product groups A to F, see the table below.

Open/close and position detection: Strength of magnetic force lines (The direction of the magnet remains unchanged, and the distance between the magnet and AMR sensor changes.)
Operation image examples			Movement of magnet	Compatible product groups
	To turn the screen on/off at notebook PC open/close operation		Distance between magnet and AMR sensor changes	A・B・C
	To detect opening and closing of air valve that operates at high speed			B・C
	To detect whether the compartment door of a refrigerator is closed		Distance between magnet and AMR sensor changes	A・B・C
	To detect the position of the lateral movement at high speed			B・C

Rotation detection: Direction of magnetic force lines (The distance between the magnet and AMR sensor does not change, but the direction of the magnet changes.)
Operation image examples			Movement of magnet	Compatible product groups
	To find out whether a key position is open or closed		Direction of magnet changes	A・B・C・D・E
	To detect whether the blades of a washing machine are turning at high speed			B・C・D・E
	To enable operation over an extended period using a single battery for an application such as a smart meter			E

Omnidirectional Detection: Detection irrespective of the direction of the magnets/magnetic field lines (Despite varying directions and proximities of the magnets, magnets in the vicinity can be detected.)
Operation image examples	Movement of magnet	Compatible product groups
To detect external, irregular, and multi-directional magnetic fields in proximity to a device		F

Product groups

Product groups	Detection application	AMR sensor name	Supply voltage[v]			Sensitivity[mT]		Average current consumption [μA]*1	Response frequency [Hz]*1	Output logic: Positive/Negative
			Min.	Typ.	Max.	Hoff	Hon
A	Position detection (Low current consumption)	MRMS501A-001	1.6	1.8	3.5	0.5	2.5	3	8 (min.・ reference value)	Negative logic
		MRMS511X-001				0.8	2.0
		MRMS201A-001	1.6	3.0	3.5	0.5	2.5	5
		MRMS205A-001	3.0	5.0	5.5			8
B	Position detection (High-speed detection)	MRMS541E	2.4	3.0	3.8	0.9	2.7	220	1,000 (min.)	Positive logic
		MRMS543E	1.6	1.8	3.6	0.5	3.1	40	500 (min.)	Positive logic
		MRSS29E	3.0	12.0	30.0	0.6	2.8	1,500 (max.)	5,000 (max.)	Positive logic
C	Position detection (Ultra-low current consumption)	MRUS74SD-001	2.0	3.0	3.6	-	2.0	0.05 (10Hz) 5 (1kHz)*3	30,000 (max.)	Positive logic
		MRUS74SK-001					3.5	0.05 (10Hz) 5 (1kHz)*3
D	Rotation detection	MRSS29DR-001	3.5	12.0	30.0	36%*2	68%*2	1,000	-
E	Rotation detection (Ultra-low current consumption)	MRMS791B	1.8	3.0	3.6	40%*2	60%*2	0.02 (10Hz) 2 (1kHz)*3	3,000 (max.)
F	Omnidirectional detection	MRMS591P	3.1	3.3	3.5	0.5	4.0	7.0	15 (min.・ reference value)	Negative logic
		MRMS581P	1.8	3.0	3.5	0.5	2.5	0.3	5 (min.・ reference value)

• *1:The characteristics are the values at a typical (Typ.) supply voltage (V) and at an air temperature of 25°C.
• *2:The sensitivity standards for the MRSS29DR-001 for rotation detection applications are based on the duty cycle (ON:OFF), not the ON/OFF sensitivity.
  When the magnetic field above a certain level rotates 360° around the surface of the sensor, a stable duty cycle is obtained. However, if the magnetic force is weak or the center of rotation of the magnetic force does not match the sensor center (and in similar circumstances), the duty cycle may be unstable.
• *3:MRUS74SD-001・MRUS74SK-001・MRMS791B can set the response frequency by inputting the pulse waveform so that the current consumption can be reduced.

Product usage examples and usage locations

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