Selection Guide | Product Search | Murata Manufacturing Co., Ltd.

AMR sensors by supported voltages and frequencies

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 C, 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			Compatible product groups
	To turn the screen on/off at notebook PC open/close operation	Distance between magnet and AMR sensor changes	A・B
	To detect opening and closing of air valve that operates at high speed	Distance between magnet and AMR sensor changes	B
	To detect whether the compartment door of a refrigerator is closed	Distance between magnet and AMR sensor changes	A・B
	To detect the position of a slider that moves at high speed	Distance between magnet and AMR sensor changes	B

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
	To detect whether the blades of a washing machine are turning at high speed		B・C

Select the AMR sensor candidate based on the supply voltage, current consumption, response frequency, and other parameters of the target group.

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
Product groups	Detection application	AMR sensor name	Min.	Typ.	Max.	Hoff	Hon	Average current consumption [μA]^*1	Response frequency [Hz]^*1	Output logic: Positive/Negative
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	1.6	1.8	3.5	0.8	2.0	3
		MRMS201A-001	1.6	3.0	3.5	0.5	2.5	5
		MRMS205A-001	3.0	5.0	5.5	0.5	2.5	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	Rotation detection	MRSS29DR-001	3.5	12.0	30.0	36%^*2	68%^*2	1,000	-

*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.

Product usage examples	Usage locations
Notebook PCs	Display opening/closing Slide switches, insertion of electronic pens
Smartphones	Cover detection, 2-screen opening/closing
Digital video cameras	Display opening/closing and reversal, slide switches
Digital cameras	Display opening/closing, reversal, and 180° full opening, slide switches, strobe pop-ups
Door anti-theft devices	Auto-lock motor stop position, window improper opening/closing, maintenance mode switching
Refrigerators	Refrigerators opening/closing、Freezer drawer
Cylinder switches	Piston end point detection
Dishwashers	Waterwheel rotation detection, door opening/closing, water leak alarm
Microswitches and compact switches	Locations with focus on waterproof structure, locations where sealing is difficult