LVDTs | McMaster-Carr

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28 Products

Linear Motion Position-Measuring Transmitters


Style 1	Style 2	Style 3	Style 4

Styles 1-4

4-Pole

Micro

M12

Plug

5-Pole

Micro

M12

Plug

Track the position of hydraulic cylinders and other components that move in a straight line. Like a tape measure, these transmitters have a wire that extends to measure how far components have traveled from a set point. Because of the wire, they're also known as string pots—short for string potentiometers. They convert measurements to an electrical signal, which can then be used to trigger automated actions in your process.

Plug In—Transmitters with a plug are quicker to connect and disconnect than those with wire leads. Plug them into a cable with a socket (sold separately).

IP67 Enclosure Rating—All are IP rated for some protection from dust. Transmitters rated IP67 seal out water when briefly submersed.

	Transmitters																		Cables with Socket
											Overall			Mounting Holes
	Stroke Lg.	Percentage Accuracy Range	Repeatability Percentage Range	Max. Input Voltage	Input Resistance, kohm	Output Signal	Housing Material	Enclosure Rating	Wire Lead Lg.	Eyelet ID	Lg.	Wd.	Ht.	Ctr.-to-Ctr.	Dia.	No. of		Each		Each
Style 1







				Wire Leads

				4 3/4"	-1% to 1%	-0.05% to 0.05%	30V AC 30V DC	10	0-28.2V AC 0-28.2V DC	Plastic	IP50	40"	0.191"	3.1"	1.9"	2.6"	(A) 1.4"	1/8"	2	000000	0000000	———	0


				12 1/2"	-0.25% to 0.25%	-0.05% to 0.05%	30V AC 30V DC	10	0-28.2V AC 0-28.2V DC	Plastic	IP50	40"	0.191"	3.1"	1.9"	2.6"	(A) 1.4"	1/8"	2	000000	000000	———	0
				25"	-0.25% to 0.25%	-0.05% to 0.05%	30V AC 30V DC	10	0-28.2V AC 0-28.2V DC	Plastic	IP50	40"	0.191"	3.1"	1.9"	2.6"	(A) 1.4"	1/8"	2	000000	000000	———	0
				50"	-0.25% to 0.25%	-0.05% to 0.05%	30V AC 30V DC	10	0-28.2V AC 0-28.2V DC	Plastic	IP50	40"	0.191"	3.1"	1.9"	2.6"	(A) 1.4"	1/8"	2	000000	000000	———	0


				Style 2







								Wire Leads

								120"	-0.35% to 0.35%	-0.05% to 0.05%	30V AC 30V DC	10	0-28.2V AC 0-28.2V DC	Plastic	IP67	40"	0.191"	2.48"	5.17"	5.09"	(A) 4 3/4" (B) 4.62" (C) 2.2"	7/32" 3/16" 3/16"	6	000000	000000	———	0




										With 4-Pole Micro M12 Plug

										120"	-0.35% to 0.35%	-0.05% to 0.05%	30V AC 30V DC	10	0-28.2V AC 0-28.2V DC	Plastic	IP67	—	0.191"	2.48"	5.17"	5.09"	(A) 4 3/4" (B) 4.62" (C) 2.2"	7/32" 3/16" 3/16"	6	00000000	000000	0000000	000000


										Style 3







														With 5-Pole Micro M12 Plug

														75"	-0.02% to 0.02%	-0.006% to 0.006%	32V DC	4.8	4 mA to 20 mA	Steel	IP64	—	0.197"	4.11"	3.11"	3.27"	(A) 0.98"	7/32"	2	00000000	000000	0000000	00000


														Style 4







																		With 5-Pole Micro M12 Plug

																		118"	-0.012% to 0.012%	-0.005% to 0.005%	32V DC	4.8	4 mA to 20 mA	Steel	IP64	—	0.083"	3.61"	3.07"	3.58"	(A) 2.32" (B) 2.44"	3/16" 3/16"	8	00000000	000000	0000000	00000

Magnetic Position-Measuring Sensor Switch Transmitters


Shown With Air Cylinder

4-Pole

Nano

M8 Plug

4-Pole

Micro

M12

Plug

Continuously monitor your air cylinder rod’s position and turn the cylinder on and off with a single component. These transmitters send positioning data to computers, programmable logic controllers (PLCs), and human-machine interfaces (HMIs). They're often integrated into automated systems for tasks such as timing when certain steps of your process should take place and verifying dimensions for quality control. Rated IP67, these transmitters withstand temporary submersion.

Press the buttons on the switch to toggle between voltage and current outputs. These transmitters have a plug that connects to cords with a socket (not included) so you can quickly connect and disconnect the switch.

			Configurable Digital Output			Configurable Analog Output
	Sensing Distance, mm	Input Voltage, V DC	No. of	Communication Protocol	Signal	No. of	Signal	Sensing Distance Resolution, mm	Repeatability, mm	Lg.	Wd.	Ht.	Housing Material	Temp. Range, ° F	Certification	Color		Each
4-Pole Nano M8 Connection







				IP67

				0 to 25	15 to 30	1	IO Link	PNP, NPN	1	0V DC to 10V DC, 4 mA to 20 mA	0.05	-0.1 to 0.1	1 9/16"	11/16"	1/2"	Plastic	15 to 140	UL Listed, C-UL Listed, CE Marked	White	0000000	0000000


				0 to 50	15 to 30	1	IO Link	PNP, NPN	1	0V DC to 10V DC, 4 mA to 20 mA	0.05	-0.1 to 0.1	2 9/16"	11/16"	1/2"	Plastic	15 to 140	UL Listed, C-UL Listed, CE Marked	White	0000000	000000
				0 to 100	15 to 30	1	IO Link	PNP, NPN	1	0V DC to 10V DC, 4 mA to 20 mA	0.05	-0.1 to 0.1	4 1/2"	11/16"	1/2"	Plastic	15 to 140	UL Listed, C-UL Listed, CE Marked	White	0000000	000000
				0 to 200	15 to 30	1	IO Link	PNP, NPN	1	0V DC to 10V DC, 4 mA to 20 mA	0.05	-0.1 to 0.1	8 7/16"	11/16"	1/2"	Plastic	15 to 140	UL Listed, C-UL Listed, CE Marked	White	0000000	000000


				4-Pole Micro M12 Connection







								IP67

								0 to 25	15 to 30	1	IO Link	PNP, NPN	1	0V DC to 10V DC, 4 mA to 20 mA	0.05	-0.1 to 0.1	1 9/16"	11/16"	1/2"	Plastic	15 to 140	UL Listed, C-UL Listed, CE Marked	White	0000000	000000


								0 to 50	15 to 30	1	IO Link	PNP, NPN	1	0V DC to 10V DC, 4 mA to 20 mA	0.05	-0.1 to 0.1	2 9/16"	11/16"	1/2"	Plastic	15 to 140	UL Listed, C-UL Listed, CE Marked	White	0000000	000000
								0 to 100	15 to 30	1	IO Link	PNP, NPN	1	0V DC to 10V DC, 4 mA to 20 mA	0.05	-0.1 to 0.1	4 1/2"	11/16"	1/2"	Plastic	15 to 140	UL Listed, C-UL Listed, CE Marked	White	0000000	000000
								0 to 200	15 to 30	1	IO Link	PNP, NPN	1	0V DC to 10V DC, 4 mA to 20 mA	0.05	-0.1 to 0.1	8 7/16"	11/16"	1/2"	Plastic	15 to 140	UL Listed, C-UL Listed, CE Marked	White	0000000	000000

Photoelectric Distance-Measuring Sensor Switch Transmitters


Wire Lead Connection	Nano M8 Connection

Micro M12 Connection	Micro M12 Connection and OLED Display

4-Pole

Nano

M8 Plug

5-Pole

Micro

M12

Plug

With a single device, continuously monitor the distance of moving items and turn equipment on and off based on their position. These transmitters use a light beam to detect subtle changes at high speeds, such as dents in cans on a canning line. They also have a time delay function, so you can keep circuits on or off for a set time after they sense an object. These transmitters use IO link to send readings to a programmable logic controller (PLC), a human-machine interface (HMI), or a computer.

All are IP rated for protection from dust and temporary submersion.

Micro M12 Connection and Nano M8 Connection—Transmitters with a plug connect to cords with a socket (sold separately), so you can quickly connect and disconnect the transmitter.

OLED Display—Transmitters with an OLED display show the measured distance in real time, so you can check readings at the transmitter. They connect to a smartphone via Bluetooth, so you can use an app to configure them remotely. They’re often used in restricted or hard to reach areas, since you can set the trigger distance and save common settings without access to the transmitter.

IP69K Enclosure Rating—Transmitters rated IP69K withstand high-pressure washdowns.

	Transmitters																			Cords		Brackets
	Sensing Distance, mm	Input Voltage, V DC	Current Output, mA	Signal Output	Communication Protocol	Sensing Distance Resolution, mm	Repeatability, mm	Time Delay, ms	Lg.	Wd.	Ht.	Housing Material	Temp. Range, ° F	Data Connection	Operating System Compatibility	Certification	Cannot Be Sold To		Each		Each		Each
Wire Lead Connection







				Direct Sensing Transmitter with Visible Laser Light Beam (IP67, IP69K)

				35 to 150	10 to 30	100	PNP	IO Link	0.1	-1 to 1	1.5, 10, 50	1 3/16"	5/8"	1 15/16"	Stainless Steel	15 to 120	—	—	UL Listed, CE Marked	—	0000000	0000000	———	0	000000000	000000


				35 to 500	10 to 30	100	PNP	IO Link	1	-9 to 9	1.5, 10, 50	1 3/16"	5/8"	1 15/16"	Stainless Steel	15 to 120	—	—	UL Listed, CE Marked	—	0000000	000000	———	0	000000000	00000


				4-Pole Nano M8 Connection







								Direct Sensing Transmitter with Visible Laser Light Beam (IP67, IP69K)

								35 to 150	10 to 30	100	PNP	IO Link	0.1	-1 to 1	1.5, 10, 50	1 3/16"	5/8"	1 15/16"	Stainless Steel	15 to 120	—	—	UL Listed, CE Marked	—	0000000	000000	0000000	000000	000000000	00000


								35 to 500	10 to 30	100	PNP	IO Link	1	-9 to 9	1.5, 10, 50	1 3/16"	5/8"	1 15/16"	Stainless Steel	15 to 120	—	—	UL Listed, CE Marked	—	0000000	000000	0000000	00000	000000000	00000


								5-Pole Micro M12 Connection







												Direct Sensing Transmitter with Visible Laser Light Beam (IP68)

												50 to 5,000	18 to 30	100	PNP	IO Link	3	-3 to 3	5, 15, 29	2 7/16"	13/16"	1 15/16"	ABS	-40 to 120	—	—	UL Listed, C-UL Certified, CE Marked	—	0000000	000000	0000000	00000	0000000	00000


												50 to 10,000	18 to 30	100	PNP	IO Link	3	-3 to 3	5, 15, 29	2 7/16"	13/16"	1 15/16"	ABS	-40 to 120	—	—	UL Listed, C-UL Certified, CE Marked	—	0000000	000000	0000000	00000	0000000	00000


												5-Pole Micro M12 Connection with OLED Display







																Direct Sensing Transmitter with Visible Laser Light Beam (IP68)

																50 to 10,000	18 to 30	100	PNP	IO Link	3	-3 to 3	5, 15, 29	2 7/16"	13/16"	2 1/8"	ABS	-40 to 120	Bluetooth	Android 6.0 or Later, iOS 14.0 or Later	UL Listed, C-UL Certified, CE Marked	Canada	0000000	000000	0000000	00000	0000000	00000