Digital Switches | McMaster-Carr

Filter by

Input Voltage

Switching Voltage

Number of Circuits Controlled

Timing Cycle

Switching Current

Maximum On/Off Cycles

Timing Adjustment Style

Wire Connection

RoHS Compliance

Certification

For Use With

REACH Compliance

Switch Designation

Switch Starting Position

Switch Type

Housing Material

DFARS Compliance

Height

Environment

Actuator Style

Enclosure Rating

Color

Width

Forward

How can we improve?

37 Products

About Pressure Switches

Seven-Day Timing Cycle

Program these switches to turn a device on and off at a set time and day. They have a three-prong outlet to plug devices directly into the switch. Use with lamps and other small electrical loads. All have an override to bypass the programmed on/off settings.

Seven-day switches can perform a different program each day of the week.

Switches with astronomical timing can be set to turn lights on and off based on sunrise and sunset.

7-Day Timing Cycle
Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Switching Current @ Voltage	No. of Outlets	Features	Ht.	Wd.	Dp.	Plug Type		Each
14 per Day	1 min.	Push Button	15 A @ 120 V AC	2	Astronomical Timing, Random On/Off Option	3"	3 1/2"	3 1/2"	Three Prong	0000000	000000

Outdoor Time and Day Activated Switches

24-Hour Timing Cycle

Seven-Day Timing Cycle

Designed to work with landscape lighting and filter pumps, these switches turn equipment on and off at a set time and day. They control two devices at once, and have three-prong outlets to plug devices directly into the switch. All have an override to bypass the programmed on/off settings.

24-hour switches repeat the same program daily. Position trippers around the clock dial to set on and off times.

Seven-day switches can perform a different program each day of the week. They have astronomical timing that can be set to turn lights on and off based on sunrise and sunset.

Switches with light sensor control allow one device to be controlled by the presence or absence of light.

NEMA 3R rated switches are protected against falling liquids and light splashing.

													Mounting
Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Tripper Type	No. of Trippers	Switching Current @ Voltage	No. of Outlets	Features	Ht.	Wd.	Dp.	Plug Type	Cord Lg., ft.	Fasteners Included	No. of Holes	Hole Dia.	Min. Ht., ft.		Each
24-Hour Timing Cycle—NEMA 3R
12 per Day	30 min.	Trippers	Removable	4	15 A @ 120 V AC	2	Light Sensor Control	9 3/8"	5 1/2"	3 3/8"	Three Prong	2	No	4	1/4"	__	0000000	0000000
7-Day Timing Cycle
7 per Day	1 min.	Push Button	__	__	15 A @ 120 V AC	2	Astronomical Timing, Random On/Off Option	5 1/8"	5 1/4"	1 7/8"	Three Prong	2	No	2	0.31"	4.5	0000000	00000

Additional Trippers (Pkg. of 2 Pairs)

0000000

Pkg.

00000

Outlet-Box-Mount Time and Day Activated Switches

Seven-Day Timing Cycle

Switches fit single device (1 gang) outlet boxes. Program them to turn a device on and off at a set time and day. They’re often used with lamps and other small electrical loads.

Seven-day switches can perform a different program each day of the week. Use the astronomical timing to turn lights on and off based on sunrise and sunset; this option can be used independently or in combination with timed programming.

7-Day Timing Cycle
No. of Circuits Controlled	Switching Current @ Voltage	Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Features	For Outlet Box Type	Wire Connection Type	Wire Lead Lg.		Each
1	15 A @ 120 V AC	40 per Week	1 min.	Push Button	Astronomical Timing, Battery Backup, LCD Display	1 Device (1 Gang)	Wire Leads	6"	0000000	000000

Outdoor Set-to-the-Minute High-Current Time and Day Activated Switches

Rated NEMA 3R, these rain-tight switches protect against falling liquids and light splashing. More precise than other time and day switches, they program on/off times for equipment down to the exact minute. They control equipment with high currents, such as landscape lighting, pumps, and heaters. A backup battery maintains the program during a power outage.

24-hour switches repeat the same program daily.

Seven-day switches can perform a different program each day of the week.

Seven-day/365-day switches can perform a different program each day of the week or year, and compensate for leap year and daylight savings time. Override regular programming for up to 99 holidays for any length of time. They can also be used to activate equipment such as bells and signals for just a few seconds.

Switches with astronomical timing can be set to turn lights on and off based on sunrise and sunset.

Switches with a day skipper can be programmed to skip operation for one to six days.

											Mounting
No. of Circuits Controlled	Switching Current @ Voltage	Input Voltage	Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Housing Material	Industry Designation	Ht.	Wd.	Dp.	Fasteners Included	Hole Dia.	Wire Connection Type		Each
24-Hour Timing Cycle
With Battery Backup, Lockout
1	30 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	20 per Day	1 min.	Push Button	Polycarbonate Plastic	SPST	8 1/4"	5"	3"	No	0.16"	Screw Terminals	0000000	0000000
2	30 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	20 per Day	1 min.	Push Button	Polycarbonate Plastic	DPST	8 1/4"	5"	3"	No	0.16"	Screw Terminals	0000000	000000
7-Day Timing Cycle
With Battery Backup, Lockout, Day Skipper
2	30 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	20 per Day	1 min.	Push Button	Polycarbonate Plastic	DPST	8 1/4"	5"	3"	No	0.16"	Screw Terminals	0000000	000000
With Battery Backup, Lockout, Day Skipper, Astronomical Timing
1	30 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	20 per Day	1 min.	Push Button	Polycarbonate Plastic	SPDT	8 1/4"	5"	3"	No	0.16"	Screw Terminals	0000000	000000
7-Day/365-Day Timing Cycle
With Battery Backup, Lockout, Astronomical Timing
1	30 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	4,000 per Year	1 min.	Push Button	Steel	SPDT	8 5/8"	5 3/4"	3 5/8"	No	0.19"	Screw Terminals	00000000	000000
2	30 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	4,000 per Year	1 min.	Push Button	Steel	SPDT	8 5/8"	5 3/4"	3 5/8"	No	0.19"	Screw Terminals	00000000	000000

Set-to-the-Minute High-Current Time and Day Activated Switches

For precise control of high-current equipment such as landscape lighting, pumps, and heaters, these switches schedule on/off times to the exact minute. A backup battery or capacitor maintains the program during a power outage.

Seven-day switches can perform a different program each day of the week. They have a day skipper that can suspend operation for one to six days.

Two-circuit switches can apply a different program to each circuit.

										Mounting
No. of Circuits Controlled	Switching Current @ Voltage	Input Voltage	Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Industry Designation	Ht.	Wd.	Dp.	Fasteners Included	Hole Dia.	Knockout Trade Size	Wire Connection Type	Environment	Specifications Met		Each
24-Hour Timing Cycle
With Capacitor Backup, Lockout
1	30 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	48 per Day	1 min.	Push Button	SPST	7 7/8"	5 1/8"	3 7/16"	No	3/16"	1/2, 3/4	Screw Terminals	Indoor Only	UL Listed, CSA Certified	0000000	0000000
2	30 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	48 per Day	1 min.	Push Button	SPST, DPST	7 7/8"	5 1/8"	3 7/16"	No	3/16"	1/2, 3/4	Screw Terminals	Indoor Only	UL Listed, CSA Certified	0000000	000000
7-Day Timing Cycle
With Capacitor Backup, Lockout, Day Skipper
1	30 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	48 per Day	1 min.	Push Button	SPST	7 7/8"	5 1/8"	3 7/16"	No	3/16"	1/2, 3/4	Screw Terminals	Indoor Only	UL Listed, CSA Certified	0000000	000000
With Battery Backup, Lockout, Day Skipper
2	30 A @ 240 V AC	120V AC/208V AC/240V AC/277V AC	28 per Day	1 min.	Push Button	SPST, DPST	7 3/4"	5"	3"	No	0.16"	1/2, 3/4	Screw Terminals	Indoor Only	UL Listed, CSA Certified	0000000	000000

Panel-Mount Set-to-the-Minute Time and Day Activated Switches

One Circuit

Two Circuits

Install these switches in a panel cutout. More precise than other time and day switches, they program on/off times for equipment down to the exact minute. The seven-day timing cycle can perform a different program each day of the week. All have an override to bypass the programmed on/off settings. A backup battery maintains the program during a power outage.

Two-circuit switches can apply a different program to each circuit.

										For Panel Cutout
No. of Circuits Controlled	Switching Current @ Voltage	Input Voltage	Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Industry Designation	Ht.	Wd.	Dp.	Ht.	Wd.	Wire Connection Type		Each
7-Day Timing Cycle
1	15 A @ 277 V AC	12V AC/24V AC/24V DC	20 per Day	1 min.	Push Button	SPDT	2.8"	2.8"	1.5"	2.63"	2.63"	Screw Terminals	00000000	0000000
1	15 A @ 277 V AC	120V AC/277V AC	20 per Day	1 min.	Push Button	SPDT	2.8"	2.8"	1.5"	2.63"	2.63"	Screw Terminals	000000000	000000
2	15 A @ 250 V AC	120V AC/240V AC	20 per Day	1 min.	Push Button	SPST-NO	2.8"	2.8"	2.2"	2.68"	2.68"	Screw Terminals	00000000	000000

Surface/DIN-Rail Mount Set-to-the-Minute Time and Day Activated Switches

24-Hour Timing Cycle

Seven-Day Timing Cycle

Mount these switches to a flat surface or attach to DIN rail. More precise than other time and day switches, they program on/off times for equipment down to the exact minute. All have an override to bypass the programmed on/off settings. A backup battery maintains the program during a power outage.

24-hour switches repeat the same program daily. They control two circuits and can apply a different program to each circuit.

Seven-day switches can perform a different program each day of the week.

										Mounting			For Panel Cutout
No. of Circuits Controlled	Switching Current @ Voltage	Input Voltage	Maximum On/Off Cycles	Minimum Set Time	Timing Adjustment Style	Industry Designation	Ht.	Wd.	Dp.	Fasteners Included	No. of Holes	For DIN Rail Ht., mm	Ht.	Wd.	Wire Connection Type		Each
24-Hour Timing Cycle
2	15 A @ 250 V AC	120V AC/240V AC	12 per Day	1 min.	Push Button	SPST-NO	3.8"	3.8"	2.2"	No	2	35	3.62"	3.62"	Screw Terminals	00000000	0000000
7-Day Timing Cycle
1	15 A @ 277 V AC	12V AC/24V AC/24V DC	20 per Day	1 min.	Push Button	SPDT	4.1"	2.9"	2.2"	__	__	__	__	__	Screw Terminals	000000000	000000
1	15 A @ 277 V AC	120V AC/277V AC	20 per Day	1 min.	Push Button	SPDT	4.1"	2.9"	2.2"	__	__	__	__	__	Screw Terminals	000000000	000000
1	15 A @ 277 V AC	120V AC/277V AC	50 per Day	1 min.	Push Button	SPDT	4.1"	2.9"	2.2"	__	__	__	__	__	Screw Terminals	000000000	000000

Wall-Mount Timer Switches

Use these switches in place of standard wall switches to automatically turn electrical equipment on or off after a set interval of time. They’re often used with lights.

Switches with override can bypass the automatic shut-off.

Set switches with beep and light signals to alert when the timer is almost done; the signals can also be turned off.

Switches with set time recall retain the last setting; hold the button down to restart the timer with that setting.

Push Button with Countdown LCD, Set Time Recall, and Beep and Light Signals

Push-Button with
Countdown LCD
and Set Time Recall

With Override
No. of Circuits Controlled	Switch Starting Position	Switching Current @ Voltage	Horsepower @ Switching Voltage	Set Time	For Outlet Box Type	Wire Connection Type	Choose a Color		Each
1	1 Off (Normally Open)	41 mA @ 24 V AC, 12 mA @ 24 V DC	__	5 min.-12 hrs.	1 Device (1 Gang)	Screw Terminals	Almond, Black, Gray, Ivory, White	000000	000000
1	1 Off (Normally Open)	6.6 A @ 120 V AC, 4.3 A @ 277 V AC	1/6 hp @ 125 V AC	5 min.-12 hrs.	1 Device (1 Gang)	Screw Terminals	Almond, Black, Gray, Ivory, White	000000	00000

Digital Potentiometers

More precise than analog potentiometers, these have a three-digit display that is easy to read. Also known as variable output switches, they vary electrical flow to control speed, volume, and light intensity.

Push Button

Potentiometers
		For Panel Cutout									Covers
Wattage	No. of Digits	Ht.	Wd.	Dp. Behind Panel	Housing Material	Wire Connection Type	No. of Terminals	Choose a Max. Resistance, kilohms		Each		Each
2 W @ 500 V AC	3	13/16"	1 7/16"	1 3/8"	Plastic	Solder Lugs	3	1, 5, 10, 20	0000000	000000	0000000	000000

Rotary

Knob

Wattage	No. of Digits	No. of Turns	Dia.	For Panel Cutout Dia.	Dp. Behind Panel	Housing Material	Wire Connection Type	No. of Terminals	Choose a Max. Resistance, kilohms		Each
1.5 W @ 385 V AC	3	10	1 1/4"	1"	5/8"	Plastic	Solder Lugs	3	1, 5, 10	0000000	0000000

Dual-Setpoint Electronic Pressure Switches with Digital Display

When these switches reach either of their two set pressures—both of which can be controlled from the display—they send digital signals to your programmable logic controller (PLC) to activate automated controls. This means you could turn on a pump at one setpoint if pressure drops too low and open a valve at another if pressure rises too high. These switches could also be used to signal an alarm before switching off a pump. For remote control and monitoring from your PLC or PC, connect an IO Link controller (not included). You’ll also need to set one of the outputs to use IO Link instead of a PNP or NPN signal.

Change your setpoint, reset point, scaling, and other settings using the display’s buttons. An adjustable reset point means you can control the amount of pressure change before the switch resets, also known as deadband or differential. Choose anywhere within the setpoint range for your reset point. The head rotates, so you can view the display from the best angle. To reduce stress on pipes in your pressure system, secure these switches against a wall or other structure with a mounting bracket (sold separately). Use these switches with an M12 cable (sold separately) to quickly connect and disconnect them.

All are rated IP65 and IP67, so they seal out dust and water from washdowns and brief submersion. UL and C-UL listed, all meet U.S. and Canadian safety standards.

For technical drawings and 3-D models, click on a part number.

Switches

Switch

4-Pole
Micro
M12 Plug

4-Pole Micro M12 Plug Connection
Setpoint, psi	Approximate Difference Between Setpoint and Reset Point	Max. Continuous Pressure, psi	Signal Output Type	Communication Protocol	Accuracy	Max. Switching Current	Process Temp. Range, °F	Connection Material	Scale	For Use With		Each
1/4 NPT Male Pipe Connection
0-14	Adjustable	145	NPN, PNP	IO Link	±0.2%	35 mA @ 30 V DC	-10° to 175°	316L Stainless Steel	in. of Hg, kPa, mbar, psi	Air, Argon, Diesel Fuel, Hydraulic Fluid, Inert Gas, Nitrogen, Oil, Water	0000000	0000000
0-36	Adjustable	290	NPN, PNP	IO Link	±0.2%	35 mA @ 30 V DC	-10° to 175°	316L Stainless Steel	bar, kPa, psi	Air, Argon, Diesel Fuel, Hydraulic Fluid, Inert Gas, Nitrogen, Oil, Water	0000000	000000
0-360	Adjustable	1,015	NPN, PNP	IO Link	±0.2%	35 mA @ 30 V DC	-10° to 175°	316L Stainless Steel	bar, kPa, psi	Air, Argon, Diesel Fuel, Hydraulic Fluid, Inert Gas, Nitrogen, Oil, Water	0000000	000000
0-1,450	Adjustable	1,810	NPN, PNP	IO Link	±0.2%	35 mA @ 30 V DC	-10° to 175°	316L Stainless Steel	bar, kPa, psi	Air, Argon, Diesel Fuel, Hydraulic Fluid, Inert Gas, Nitrogen, Oil, Water	0000000	000000
0-3,600	Adjustable	7,250	NPN, PNP	IO Link	±0.2%	35 mA @ 30 V DC	-10° to 175°	316L Stainless Steel	bar, kPa, psi	Air, Argon, Diesel Fuel, Hydraulic Fluid, Inert Gas, Nitrogen, Oil, Water	0000000	000000
0-5,800	Adjustable	11,580	NPN, PNP	IO Link	±0.2%	35 mA @ 30 V DC	-10° to 175°	316L Stainless Steel	bar, kPa, psi	Air, Argon, Diesel Fuel, Hydraulic Fluid, Inert Gas, Nitrogen, Oil, Water	0000000	000000

Hex Clamp Mounting Brackets

Hex Clamp Bracket

		Length, mm
Material	Color	(A)	(B)	(C)	Mounting Fasteners Included	Mounting Hole Style	For Screw Size		Each
Plastic	Black	50	64	40	Yes	Straight	M5	00000000	000000

Micro M12 Cables with Socket

							Housing Thread
Number of Poles	Coding	Face Diameter	Voltage	Current	Wire Lead Gauge	Cable OD	Size	Pitch, mm	Type	Temperature Range, °F	Environmental Rating		Each
12ft. Cable Lead Lg.
4	A	0.3"	250V AC/250V DC	4A	22	0.25"	M12	1	Metric	0° to 220°	IP67	0000000	000000

Electronic Temperature Switches with Digital Display

4-Pole
Micro
M12 Plug

A digital display makes it easy to monitor the temperature and control when these switches turn heating equipment on and off. They have an adjustable reset, so you can change the temperature range between when they activate and deactivate, commonly referred to as deadband and differential. Use the keypad to adjust the setpoint and reset point anywhere on the setpoint range. They produce an electronic signal that is often used to communicate with a programmable logic controller (PLC), so they're common in control and automation applications. Install them directly into tanks, pipelines, and other process components using their threaded probe.

These switches have a micro M12 plug, so you can quickly connect and disconnect them.

Rated IP65 and IP67, these switches protect against dust and water from washdowns and temporary submersion. They’re also UL listed, C-UL listed, and CE marked, so they meet U.S., Canadian, and European safety standards.

For technical drawings and 3-D models, click on a part number.

						Probe
Temp. Range	Approx. Difference Between Setpoint and Reset Point	Temp. Accuracy	Actuation Tolerance	Signal Output Type	Max. Switching Current @ Voltage	Dia.	Lg.	Max. Pressure, psi	Plug Type	Environmental Rating	Specifications Met		Each
2 Circuits Controlled—2 Off (Normally Open) or 2 On (Normally Closed)
Threaded Stainless Steel Probe—1/4 NPT Male
0º to 170° F / -20º to 80° C	Adjustable	±0.6° F / ±0.9° C	±0.5%	PNP	250 mA @ 35 V DC	1/4"	1"	2,100	4-Pole Micro M12	IP65, IP67	UL Listed; C-UL Listed; CE Marked	0000000	0000000
0º to 240° F / -20º to 120° C	Adjustable	±0.8° F / ±1° C	±0.5%	PNP	250 mA @ 35 V DC	1/4"	6"	725	4-Pole Micro M12	IP65, IP67	UL Listed; C-UL Listed; CE Marked	0000000	000000