Ring Sensors | McMaster-Carr

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22 Products

About Proximity Sensors

Compare sensing types, mounting styles, wiring options, and input and output requirements to choose the right proximity sensor for your application.

Ring DC Metallic-Object Proximity Sensors


	4-Pole M12 Plug

Sense objects as they pass through the sensor's ring via tubing or a funnel. These sensors are often used to monitor blockages, detect breaks in spooling wire, or count small metallic parts, such as screws, during the stamping process. Also known as inductive proximity sensors, they sense metallic objects even if they’re obscured by water, oil, dirt, or a surface finish. Send their signal to programmable logic controllers (PLCs) to support automated processes within your system. Sensors are CE marked and UL and C-UL listed to meet stringent domestic and international safety standards. Rated IP67, they’re protected against dust, washdowns, and temporary submersion.

These sensors have a 4-pole M12 plug to connect to cables with sockets (sold separately), allowing you to quickly connect and disconnect the sensor.

To view wiring diagrams, select a part number and click Product Detail.

	Sensors																	Cables with Sockets
		For Object
	Switch Starting Position	Min. Dia., mm	Max. Speed, m/s	ID, mm	Output Digital Signal	Switching Freq., kHz	Input Voltage	Current Output	Electrical Connection Type	Lg., mm	Wd., mm	Ht., mm	Circuit Protection	Temp. Range, ° F	Certification		Each		Each
Plastic Housing (IP67)







				4-Pole M12 Connection

				1 Off or 1 On	0.6	35	10	PNP	5	10V DC to 35V DC	200 mA	Plug In	20	35	60	Overload Reverse Polarity Short Circuit	-10 to 155	C-UL Listed, CE Marked, UL Listed	7091N13	0000000	6897K36	000000


				1 Off or 1 On	0.6	35	10	NPN	5	10V DC to 35V DC	200 mA	Plug In	20	35	60	Overload Reverse Polarity Short Circuit	-10 to 155	C-UL Listed, CE Marked, UL Listed	7091N14	000000	6897K36	00000
				1 Off or 1 On	0.8	35	15	PNP	5	10V DC to 35V DC	200 mA	Plug In	20	35	60	Overload Reverse Polarity Short Circuit	-10 to 155	C-UL Listed, CE Marked, UL Listed	7091N17	000000	6897K36	00000
				1 Off or 1 On	0.8	35	15	NPN	5	10V DC to 35V DC	200 mA	Plug In	20	35	60	Overload Reverse Polarity Short Circuit	-10 to 155	C-UL Listed, CE Marked, UL Listed	7091N18	000000	6897K36	00000
				1 Off or 1 On	1	35	20	PNP	5	10V DC to 35V DC	200 mA	Plug In	20	35	60	Overload Reverse Polarity Short Circuit	-10 to 155	C-UL Listed, CE Marked, UL Listed	7091N22	000000	6897K36	00000
				1 Off or 1 On	1	35	20	NPN	5	10V DC to 35V DC	200 mA	Plug In	20	35	60	Overload Reverse Polarity Short Circuit	-10 to 155	C-UL Listed, CE Marked, UL Listed	7091N23	000000	6897K36	00000
				1 Off or 1 On	1.2	35	25	PNP	5	10V DC to 35V DC	200 mA	Plug In	20	35	60	Overload Reverse Polarity Short Circuit	-10 to 155	C-UL Listed, CE Marked, UL Listed	7091N26	000000	6897K36	00000
				1 Off or 1 On	1.2	35	25	NPN	5	10V DC to 35V DC	200 mA	Plug In	20	35	60	Overload Reverse Polarity Short Circuit	-10 to 155	C-UL Listed, CE Marked, UL Listed	7091N27	000000	6897K36	00000
				1 Off or 1 On	1.5	35	10	PNP	2	10V DC to 35V DC	200 mA	Plug In	20	35	60	Overload Reverse Polarity Short Circuit	-10 to 155	C-UL Listed, CE Marked, UL Listed	7091N11	000000	6897K36	00000
				1 Off or 1 On	1.5	35	10	NPN	2	10V DC to 35V DC	200 mA	Plug In	20	35	60	Overload Reverse Polarity Short Circuit	-10 to 155	C-UL Listed, CE Marked, UL Listed	7091N12	000000	6897K36	00000
				1 Off or 1 On	2	35	15	PNP	2	10V DC to 35V DC	200 mA	Plug In	20	35	60	Overload Reverse Polarity Short Circuit	-10 to 155	C-UL Listed, CE Marked, UL Listed	7091N15	000000	6897K36	00000


				1 Off or 1 On	2	35	15	NPN	2	10V DC to 35V DC	200 mA	Plug In	20	35	60	Overload Reverse Polarity Short Circuit	-10 to 155	C-UL Listed, CE Marked, UL Listed	7091N16	000000	6897K36	00000
				1 Off or 1 On	2.5	35	20	PNP	2	10V DC to 35V DC	200 mA	Plug In	20	35	60	Overload Reverse Polarity Short Circuit	-10 to 155	C-UL Listed, CE Marked, UL Listed	7091N19	000000	6897K36	00000
				1 Off or 1 On	2.5	35	20	NPN	2	10V DC to 35V DC	200 mA	Plug In	20	35	60	Overload Reverse Polarity Short Circuit	-10 to 155	C-UL Listed, CE Marked, UL Listed	7091N21	000000	6897K36	00000
				1 Off or 1 On	3	35	25	PNP	2	10V DC to 35V DC	200 mA	Plug In	20	35	60	Overload Reverse Polarity Short Circuit	-10 to 155	C-UL Listed, CE Marked, UL Listed	7091N24	000000	6897K36	00000
				1 Off or 1 On	3	35	25	NPN	2	10V DC to 35V DC	200 mA	Plug In	20	35	60	Overload Reverse Polarity Short Circuit	-10 to 155	C-UL Listed, CE Marked, UL Listed	7091N25	000000	6897K36	00000
				1 Off or 1 On	6	35	51	PNP	2	10V DC to 35V DC	200 mA	Plug In	20	80	110	Overload Reverse Polarity Short Circuit	-10 to 155	C-UL Listed, CE Marked, UL Listed	7091N28	000000	6897K36	00000

Hazardous Location Ring DC Metallic-Object Proximity Sensors

Often used in the stamping process to count small metallic parts, such as screws, nuts, and washers, these sensors detect objects as they pass through the ring via tubing or a funnel. Intrinsically safe, they produce a low-current, low-voltage NAMUR signal, so they won’t ignite or create sparks while in use. Sensors meet ATEX international certification to protect against explosion in environments containing flammable gases. Prior to use, sensors must be connected to the required barriers (sold separately), which reduce the current and voltage going into the hazardous location.

Also known as inductive proximity sensors, they sense objects even if they’re obscured by water, oil, dirt, or a surface finish. Send their signal to programmable logic controllers (PLCs) to support automated processes within your system. Sensors meet various national and international safety standards, and they’re rated IP67 to protect against dust, washdowns, and temporary submersion.

To view wiring diagrams, select a part number and click Product Detail.

		For Object
	Switch Starting Position	Min. Dia., mm	Max. Speed, m/s	ID, mm	Output Digital Signal	Switching Freq., kHz	Input Voltage	Current Output	Electrical Connection Type	No. of Wire Leads	Lg., mm	Wd., mm	Ht., mm	Cable Lead Lg., ft.	Cable OD	Temp. Range, ° F	Hazardous Location Rating	Certification		Each
Plastic Housing (IP67)







				Wire Lead Connection

				1 On	2.5	36	10	NAMUR	2	5V DC to 25V DC	10 mA	Hardwire	2	20	25	32.5	6 1/2	0.1"	0 to 145	ATEX II 2 G Ex Ia IIC T6...T1 Gb; IEC Zone 1 Groups IIC, IIB, IIA	C-UL Listed, CE Marked, CSA Certified, FM Approved, UL Listed	7115N11	0000000


				1 On	3	27	15	NAMUR	1.5	5V DC to 25V DC	10 mA	Hardwire	2	20	25	32.5	6 1/2	0.1"	0 to 145	ATEX II 2 G Ex Ia IIC T6...T1 Gb; IEC Zone 1 Groups IIC, IIB, IIA	C-UL Listed, CE Marked, CSA Certified, FM Approved, UL Listed	7115N12	000000

Safety Barriers

While the sensors can safely be used in hazardous areas, the barriers must be installed in a separate nonhazardous area.

		Inputs				Outputs
	Operating Voltage, V DC	Voltage, V DC	Current, mA	No. of	Signal	Current, amp	No. of	Switching Freq., kHz	Hazardous Location Rating	Enclosure Rating		Each
Plastic Housing



		24	10	8	1	NAMUR	0.05	2	5	ATEX I (M1) [Ex Ia Ma] I; ATEX II (1)D [Ex Ia Da] IIIC; ATEX II (1)G [Ex Ia Ga] IIC; Associated Apparatus for IEC Zone 0 Groups IIC, IIB, IIA; Associated Apparatus for IEC Zone 20 Groups IIIC, IIIB, IIIA; IECEx [Ex Ia Da] IIIC; IECEx [Ex Ia Ga] IIC; IECEx [Ex Ia Ma] I; IECEx Ex Ec IIC T4 Gc	IP20	7107N12	0000000