Surface-Mount Counters | McMaster-Carr

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55 Products

Lever-Actuated Counters


Screw On Style A	Screw On Style B

Connect the lever on these counters to an object moving repetitively in a straight line, such as a punch or drill press.

Not Resettable—Non-resettable counters prevent tampering and accidental loss of data.

						Lever				Overall			Mounting
	Style	Resettable	Counting Direction	No. of Digits	Max. Counts per min.	Direction	Angle	Location	Actuation Type	Ht.	Wd.	Dp.	Fasteners Included	Screw Size	Housing Material		Each
Screw On



		A	Yes	Up	5	1,000	Clockwise	40° to 45°	Left Side	Spring Return	1.5"	2.6"	1.3"	No	No. 5	Plastic	0000000	000000


		A	Yes	Up	5	1,000	Clockwise	40° to 45°	Right Side	Spring Return	1.4"	2.5"	1.3"	No	M3	Plastic	0000000	00000
		A	Yes	Up	5	1,000	Counterclockwise	40° to 45°	Left Side	Spring Return	1.4"	2.5"	1.3"	No	M3	Plastic	0000000	00000
		A	Yes	Up	5	1,000	Counterclockwise	40° to 45°	Right Side	Spring Return	1.5"	2.6"	1.3"	No	No. 5	Plastic	0000000	00000
		A	Yes	Up	5	1,000	Counterclockwise	49° to 60°	Right Side	Spring Return	1.5"	3.2"	1.4"	No	No. 5	Plastic	0000000	000000
		A	Yes	Up	6	1,000	Counterclockwise	40° to 70°	Right Side	Spring Return	3.3"	5.6"	2.2"	No	No. 10	Zinc	0000000	000000
		B	No	Up	6	500	Counterclockwise	0° to 17°	Right Side	Spring Return	2.3"	2.4"	1.7"	No	No. 5	Steel	0000000	00000

Surface-Mount Push-Button Counters


Screw On Style A	Screw On Style B	Screw On Style C	Screw On Style C 2 Counters	Screw On Style D

						Overall				Mounting
	Style	Resettable	Counting Direction	No. of Counters	No. of Digits	Ht.	Wd.	Dp.	Dia.	Fasteners Included	Screw Size	Housing Material		Each
Screw On



		A	Yes	Up	1	5	1.5"	2.6"	1.3"	—	No	No. 5	Plastic	0000000	000000


		B	Yes	Up	1	4	2.76"	—	—	2.2"	No	No. 6	Steel	0000000	00000
		C	Yes	Up	1	4	2.76"	—	—	2.2"	No	No. 6	Steel	0000000	00000
		C	Yes	Up	1	4	2.76"	—	—	2.2"	No	No. 6	Stainless Steel	0000000	000000
		C	Yes	Up	2	4	2.6"	2.7"	2.4"	—	No	No. 6	Steel	0000000	00000
		C	Yes	Up	3	4	2.6"	3.9"	2.4"	—	No	No. 6	Steel	0000000	00000
		C	Yes	Up	4	4	2.6"	5.2"	2.4"	—	No	No. 6	Steel	0000000	000000
		C	Yes	Up	5	4	2.6"	6.4"	2.4"	—	No	No. 6	Steel	0000000	000000
		C	Yes	Up	6	4	2.6"	7.6"	2.4"	—	No	No. 6	Steel	0000000	000000
		D	Yes	Up	1	4	1.6"	2.7"	2.4"	—	Yes	No. 12	Aluminum	000000	00000
		D	Yes	Up	2	4	1.6"	4"	2.4"	—	Yes	No. 12	Aluminum	0000000	000000


		D	Yes	Up	3	4	1.6"	5.3"	2.4"	—	Yes	No. 12	Aluminum	0000000	000000
		D	Yes	Up	4	4	1.6"	6.6"	2.4"	—	Yes	No. 12	Aluminum	0000000	000000
		D	Yes	Up	5	4	1.6"	7.5"	2.4"	—	Yes	No. 12	Aluminum	0000000	000000

Counters with Proximity Sensor

Count metallic objects as they touch or pass within 0.059" of this counter's built-in sensor. It has an output relay to send a signal to another device when a set point is reached. The signal can start/stop a process or trigger an alarm. A scaling function lets you adjust the unit of measure to suit your application. Counter and enclosure are protected from dust and washdowns and can be used outdoors (rated NEMA 4X). Drill through the back of the enclosure to mount to a wall or work surface.

							Sensor			Overall
	Resettable	Counting Direction	No. of Digits	No. of Set Points	Max. Counts per min.	Max. Sensing Distance	Lg.	Dia.	Cord Lg., ft.	Ht.	Wd.	Dp.	Operating Voltage, V AC	Output Relay Current @ Input Voltage	Features	Enclosure Rating	Certification	Housing Material		Each
Screw On



		Yes	Down, Up	6	2	300,000	0.059"	3 1/2"	3/4"	10	7.5"	7.5"	5.1"	85 to 250	5 amp @ 120V AC 5 amp @ 240V AC 5 amp @ 28V DC	Scaling Function	NEMA 4X	UL Listed, C-UL Listed	Plastic	00000000	000000000

Rotating-Shaft-Actuated Counters


Screw On 1 Shaft	Screw On 2 Shafts

Precisely count rotations by attaching these counters to clutches, couplings, rotors, or other rotating shafts.

Shaft rotation direction is the direction of rotation when you're looking at the counter from the end of the shaft.

								Shaft		Overall
	Resettable	No. of Digits	Max. Counts per min.	Counts per Rev.	No. of Shafts	Shaft Location	Counting Direction (Shaft Rotating Direction)	Dia.	Lg.	Ht.	Wd.	Dp.		Each
Screw On



		Yes	5	500	10	1	Left Side	Up (Clockwise), Down (Counterclockwise)	1/8"	7/16"	1.5"	3.2"	1.4"	0000000	0000000


		Yes	5	500	10	1	Right Side	Up (Clockwise), Down (Counterclockwise)	1/8"	7/16"	1.5"	3.2"	1.4"	0000000	000000
		Yes	5	500	10	1	Right Side	Up (Counterclockwise), Down (Clockwise)	1/8"	7/16"	1.5"	3.2"	1.4"	0000000	000000
		Yes	7	1,000	1	2	Left Side, Right Side	Up (Clockwise and Counterclockwise)	0.28"	11/16"	3.2"	5.1"	1.9"	0000000	000000

Surface-Mount Electrically Actuated Counters


Screw On Style A	Screw On Style B	Screw On Style C

Screw On Style D	Screw On Style E	Screw On Style F

Wire these counters up to an electrical pulse-emitting switch, sensor, or encoder for use on machine tools, packaging machinery, or other equipment.

Not Resettable—Non-resettable counters prevent tampering and accidental loss of data.

						Overall					Mounting
	Style	Resettable	Counting Direction	No. of Digits	Max. Counts per min.	Ht.	Wd.	Dp.	Input Voltage	Features	Fasteners Included	Screw Size	Enclosure Rating	Certification	Housing Material		Each
Screw On







				Wire Leads

				A	Yes	Up	4	600	1.2"	2.6"	2.9"	120V AC	—	No	No. 4	—	UL Recognized Component	Plastic	0000000	000000


				A	Yes	Up	6	600	1.2"	3.1"	2.9"	24V DC	—	No	No. 4	—	UL Recognized Component	Plastic	0000000	00000
				A	Yes	Up	6	600	1.2"	3.1"	2.9"	120V AC	—	No	No. 4	—	UL Recognized Component	Plastic	0000000	00000
				B	Yes	Up	6	1,000	2.6"	3.7"	1.8"	120V AC	—	No	No. 6	—	UL Recognized Component	Zinc	0000000	000000
				C	No	Up	6	600	2.3"	1.7"	2.3"	120V AC	—	No	No. 5	—	UL Recognized Component	Steel	0000000	00000
				C	No	Up	6	600	2.3"	1.8"	2.4"	24V DC	—	No	No. 5	—	UL Recognized Component	Steel	0000000	00000
				D	No	Up	7	600	1.4"	1.6"	1.7"	12V DC	—	No	No. 5	—	UL Recognized Component	Plastic	0000000	00000
				D	No	Up	7	600	1.4"	1.6"	1.7"	24V AC	—	No	No. 5	—	UL Recognized Component	Plastic	0000000	00000
				D	No	Up	7	600	1.4"	1.6"	1.7"	120V AC	—	No	No. 5	—	UL Recognized Component	Plastic	0000000	00000
				E	No	Up	7	1,500	0.6"	1.8"	1.7"	12V DC	—	No	No. 5	IP65	UL Recognized Component, C-UL Recognized Component	Plastic	0000000	00000
				E	No	Up	7	1,500	0.6"	1.8"	1.7"	24V DC	—	No	No. 5	IP65	UL Recognized Component, C-UL Recognized Component	Plastic	0000000	00000


				F	Yes	Up	6	2,400	1.8"	3.9"	3"	6V AC to 240V AC, 6V DC to 240V DC	Battery-Powered Display	No	No. 5	—	—	Zinc	0000000	000000

Large-Display Combination Switch-Contact/Electrically Actuated Counters

The digits displayed on these counters are visible up to 100 ft. away and the display can be adjusted to suit lighting conditions. You can set counters up to count with or without voltage inputs based on the switch, sensor, or encoder you have. Counters can be wired for remote reset. They are protected against dust and washdowns and can be used outdoors (rated NEMA 4X). Programming backup maintains settings if power is lost.

						Overall						Mounting
	Resettable	Counting Direction	No. of Digits	Max. Counts per Min. (Input Method)	Digit Ht.	Ht.	Wd.	Dp.	Input Voltage	Operating Voltage	Features	Fasteners Included	Screw Size	Enclosure Rating	Certification	Housing Material		Each
Screw On







				Screw Terminals

				Yes	Down, Up	4	1,500,000 (Voltage), 3,000 (Switch Contact)	2 1/4"	4"	12"	2.25"	2.75V DC to 28V DC	21.6V DC to 250V DC 50V AC to 250V AC	Programming Backup, Three-prong plug with 6' cord for operating display	No	No. 10	NEMA 4X	UL Listed, C-UL Listed, CE Marked	Aluminum	00000000	0000000


				Yes	Down, Up	4	1,500,000 (Voltage), 3,000 (Switch Contact)	4"	7.875"	20"	2.25"	2.75V DC to 28V DC	21.6V DC to 250V DC 50V AC to 250V AC	Programming Backup, Three-prong plug with 6' cord for operating display	No	No. 10	NEMA 4X	UL Listed, C-UL Listed, CE Marked	Aluminum	00000000	000000
				Yes	Down, Up	6	1,500,000 (Voltage), 3,000 (Switch Contact)	2 1/4"	4"	16"	2.25"	2.75V DC to 28V DC	21.6V DC to 250V DC 50V AC to 250V AC	Programming Backup, Three-prong plug with 6' cord for operating display	No	No. 10	NEMA 4X	UL Listed, C-UL Listed, CE Marked	Aluminum	00000000	000000
				Yes	Down, Up	6	1,500,000 (Voltage), 3,000 (Switch Contact)	4"	7.875"	26"	2.25"	2.75V DC to 28V DC	21.6V DC to 250V DC 50V AC to 250V AC	Programming Backup, Three-prong plug with 6' cord for operating display	No	No. 10	NEMA 4X	UL Listed, C-UL Listed, CE Marked	Aluminum	00000000	00000000

Tachometers/Hour Meters for Gas Powered Engines

Continuously measure the speed and running time of your engine to monitor its performance and detect mechanical issues early. These meters can be programmed based on engine run time to light up for maintenance reminders, such as oil changes, filter replacements, and inspections. Wrap the signal wire four to five times around your spark plug to secure it in place. They’re battery powered, so they will start showing readings as soon as you turn on the engine. It adjusts to nine different engine types for accurate readings.

IP67 Enclosure Rating—They’re rated IP67, so they won’t get damaged from dust and water.

								For Panel Cutout			Overall				Mounting
	Velocity Measured Range, rpm	Accuracy	Digital Display Type	Resettable	Counting Direction	No. of Digits	Measurement Unit	Ht.	Wd.	Dp.	Ht.	Wd.	Dp.	Batteries Included	Fasteners Included	Screw Size	Features	Enclosure Rating		Each
Adhesive Back







				Wraparound Connection

				0 to 25,000	±0.002	LCD	Yes	Up	6	Revolutions per Minute	1.6"	2.3"	0.8"	1.56"	3.15"	0.79"	Yes	No	No. 12	Battery-Powered Display, Maintenance Reminder, Maximum RPM Reading Recall, Timer	IP67	0000000	000000

Surface-Mount Air-Actuated Counters

These counters register up to 600 pulses of compressed air per minute. Counts decrease as air hose length increases; the hose length should not exceed 2 _1/2 ft. to reach 600 counts per minute. Pressure must drop to 0 psi between pulses.

					Overall			Mounting			Air Inlet
	Resettable	Counting Direction	No. of Digits	Max. Counts per min.	Ht.	Wd.	Dp.	Fasteners Included	Screw Size	Operating Air Pressure, psi	Thread Size	Gender	Housing Material		Each
Screw On



		Yes	Up	4	600	1.9"	1.5"	3.2"	No	No. 8	25 to 100	10-32	Female	Plastic	0000000	0000000


		Yes	Up	6	600	1.9"	2.1"	3.2"	No	No. 8	25 to 100	10-32	Female	Plastic	0000000	000000

Large-Display Combination Switch-Contact/Electrically Actuated Counters with Output Relay

The digits displayed on these counters are visible up to 100 ft. away and the display can be adjusted to suit lighting conditions. You can set counters up to count with or without voltage inputs based on the switch, sensor, or encoder you have. They can be wired for remote reset. An output relay sends a signal to another device when a set point is reached. The signal can start/stop a process or trigger an alarm. Counters are protected from dust and washdowns and can be used outdoors (rated NEMA 4X). Programming backup maintains settings if power is lost.

							Overall
	Resettable	Counting Direction	No. of Digits	No. of Set Points	Max. Counts per Min. (Input Method)	Digit Ht.	Ht.	Wd.	Dp.	Input Voltage, V DC	Operating Voltage	Output Relay Current @ Input Voltage	Mounting Screw Size	Enclosure Rating		Each
Screw On







				Screw Terminals

				Yes	Down, Up	6	1	1,500,000 (Voltage), 3,000 (Switch Contact)	2 1/4"	4"	16"	2.25"	2.75 to 28	21.6V DC to 250V DC 50V AC to 250V AC	5 amp @ 120V AC 5 amp @ 240V AC 5 amp @ 28V DC	No. 10	NEMA 4X	00000000	0000000


				Yes	Down, Up	6	1	1,500,000 (Voltage), 3,000 (Switch Contact)	4"	7.875"	26"	2.25"	2.75 to 28	21.6V DC to 250V DC 50V AC to 250V AC	5 amp @ 120V AC 5 amp @ 240V AC 5 amp @ 28V DC	No. 10	NEMA 4X	00000000	00000000

Vibration-Actuated Hour Meters


Adhesive Back Style D	Magnetic Back Style E

Record the running time of machines and vehicles that vibrate while operating. These meters are battery powered, so they don’t require any special wiring or external power source.

Style D—Style D meters let you switch between two sensitivity levels to prevent inaccurate counts during transport.

Not Resettable—Non-resettable counters prevent tampering and accidental loss of data.

IP67 Enclosure Rating and IP68 Enclosure Rating—IP67 or IP68 rated, these meters seal out water from temporary submersion.

					Overall
	Style	Resettable	Counting Direction	No. of Digits	Ht.	Wd.	Dp.	Features	Enclosure Rating		Each
Surface Mount







				Adhesive Back

				D	Yes	Up	5	1.3"	2.6"	0.6"	Battery-Powered Display, Vibration Sensitivity Settings (Low and High)	IP68	0000000	000000




						Magnetic Back

						E	No	Up	6	1.4"	2.1"	0.6"	Battery-Powered Display	IP67	0000000	00000

Preventative Maintenance and Inspection Indicators

Mount these indicators to your equipment, and their bright LED will catch your attention when it’s time for maintenance or inspection. They’re commonly used to keep track of maintenance on production lines and HVAC systems, or paired with inspection tags on fire extinguishers and eye wash stations.

When first set, these indicators flash a dark green and then a light green color every two minutes. As a scheduled inspection approaches, they flash a yellow light every 10 seconds. And when an inspection is past due, they blink red every two seconds. Reset indicators to start the countdown again. They meet IP65, so they seal out dust and low-pressure washdowns.

	Resettable	Dia.	Ht.	Thk.	Batteries Included	Mounting Fasteners Included	Enclosure Rating		Each
Screw On, Hanging Mount, Tie On



	7	Yes	2 1/2"	3 5/8"	7/8"	Yes	Yes	IP65	000000	000000


	30	Yes	2 1/2"	3 5/8"	7/8"	Yes	Yes	IP65	000000	00000
	180	Yes	2 1/2"	3 5/8"	7/8"	Yes	Yes	IP65	000000	00000
	365	Yes	2 1/2"	3 5/8"	7/8"	Yes	Yes	IP65	000000	00000

Electric-Motor-Actuated Hour Meters

With a sensor that’s activated by your electric motor’s magnetic field, these meters show the motor’s running time. To mount the meter sensor to your motor, use the adhesive back.

Not Resettable—Non-resettable counter prevents tampering and accidental loss of data.

Resettable—Resettable counter alerts the user when the count reaches a set point.

				Overall
	Resettable	Counting Direction	No. of Digits	Ht.	Wd.	Dp.	Features		Each
Screw On



		No	Up	5	1.9"	2.9"	0.8"	Battery-Powered Display	0000000	000000


		Yes	Up	5	1.9"	2.9"	0.8"	Battery-Powered Display	0000000	000000