PANEL MOUNT Keylock Switches 2,170

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Part	Manufacturer	Switch Type	Mounting Feature	Switch Function	Type (Actuator)	Contact Function	Solderability	AC Maximum Rating R Load (Contact)	Center Contact Plating	Housing Material	Angle (Actuator)	Dielectric Withstand Volts (V)	Terminal Material	Electrical Life	Insulation Resistance	Body Length/Diameter	Body Width	Length (Bushing)	Sealing	No. of Switch Sections	Contact Timing	Insulator Material	End Contact Plating	Body Height	DC Maximum Rating R Load (Contact)	Finish (Actuator)	Maximum Operating Temperature	Maximum AC Contact Current	Center Contact Material	Minimum Operating Temperature	Length (Actuator)	Terminal Finish	Switch Action	Maximum DC Contact Current	Termination Type	No. of Independent Keys	Manufacturer Series	Contact Resistance	Diameter (Bushing)	End Contact Material	PCB Hole Count	No. of Positions	Maximum DC Contact Voltage	Additional Features	Maximum AC Contact Voltage	JESD-609 Code	Indexing Angle	Type (Bushing)	Terminal Length	Material (Actuator)
1.15.108.571/0100	Rafi & Kg	KEYLOCK SWITCH	PANEL MOUNT		KEYLOCK									50000 Cycle(s)				.295 inch			SNAP ACTION						70 Cel			-25 Cel			LATCHED		SOLDER LUG		1.15	200 mohm				2					90 deg
2SWK131AL101	TE Connectivity	KEYLOCK SWITCH	PANEL MOUNT	SPST		OFF-ON		1A@120VAC			90 deg			10000 Cycle(s)		23.1 mm				1	MAKE-BEFORE-BREAK			29 mm				1 A	SILVER				LATCHED	1 A	WIRE	1		50 mohm							120 V					BRASS
2SWK231AL101	TE Connectivity	KEYLOCK SWITCH	PANEL MOUNT	SPST		OFF-(ON)		1A@120VAC			90 deg			10000 Cycle(s)		23.1 mm				1	MAKE-BEFORE-BREAK			29 mm				1 A	SILVER				LATCHED	1 A	WIRE	1		50 mohm						SOLDER LUG TERMINALS ALSO AVAILABLE	120 V					BRASS
Y101132C203NQ	C & K Components	KEYLOCK SWITCH	PANEL MOUNT		KEYLOCK			4A@125VAC	SILVER	GLASS FILLED POLYESTER		1000VRMS	COPPER	10000 Cycle(s)	1000000000 ohm							GLASS FILLED POLYESTER	SILVER		4A@28VDC	STAINLESS STEEL		4 A	COPPER			SILVER		4 A	SOLDER LUG			10 mohm		COPPER		1	28 V		125 V	e4				ZINC ALLOY
Y201132C203NQ	C & K Components	KEYLOCK SWITCH	PANEL MOUNT		KEYLOCK			2A@250VAC	SILVER	GLASS FILLED POLYESTER		1000VRMS	COPPER	10000 Cycle(s)	1000000000 ohm							GLASS FILLED POLYESTER	SILVER		4A@28VDC	STAINLESS STEEL		2 A	COPPER			SILVER		4 A	SOLDER LUG			10 mohm		COPPER		1	28 V		250 V	e4				ZINC ALLOY
CKM12BTW01	Nkk Switches	KEYLOCK SWITCH	PANEL MOUNT	SPDT	KEYLOCK	ON-ON	HAND	3A@250VAC	SILVER	GLASS FILLED POLYBUTYLENE TEREPHTHALATE		1500VAC	COPPER ALLOY	10000 Cycle(s)	1000000000 ohm	18.9992 mm		.63 inch	EPOXY		BREAK-BEFORE-MAKE	LIQUID CRYSTAL POLYMER	SILVER	26.2128 mm			70 Cel	3 A	COPPER	-25 Cel	.157 inch	SILVER			SOLDER LUG			20 mohm	.63 inch	COPPER		2			250 V	e4	90 deg	M16P1	.197 inch
Y2011U2C203NQ	C & K Components	KEYLOCK SWITCH	PANEL MOUNT		KEYLOCK			2A@250VAC	SILVER	GLASS FILLED POLYESTER		1000VRMS	COPPER	10000 Cycle(s)	1000000000 ohm							GLASS FILLED POLYESTER	SILVER		4A@28VDC	STAINLESS STEEL		2 A	COPPER			SILVER		4 A	SOLDER LUG			10 mohm		COPPER		2	28 V		250 V	e4				ZINC ALLOY
CKL13EFW01	Nkk Switches	KEYLOCK SWITCH	PANEL MOUNT	SPDT	KEYLOCK	ON-OFF-ON	HAND	3A@250VAC	SILVER	ZINC ALLOY		1500VAC	COPPER ALLOY	10000 Cycle(s)	1000000000 ohm	21.9964 mm		.669 inch	EPOXY		BREAK-BEFORE-MAKE	LIQUID CRYSTAL POLYMER	SILVER	29.083 mm			70 Cel	3 A	COPPER	-25 Cel	.213 inch	SILVER			SOLDER LUG			20 mohm	.748 inch	COPPER		3			250 V	e4	45 deg	M19P1	.217 inch
CKL12ATW01	Nkk Switches	KEYLOCK SWITCH	PANEL MOUNT	SPDT	KEYLOCK	ON-ON	HAND	3A@250VAC	SILVER	ZINC ALLOY		1500VAC	COPPER ALLOY	10000 Cycle(s)	1000000000 ohm	21.9964 mm		.669 inch	EPOXY		BREAK-BEFORE-MAKE	LIQUID CRYSTAL POLYMER	SILVER	29.083 mm			70 Cel	3 A	COPPER	-25 Cel	.213 inch	SILVER			SOLDER LUG			20 mohm	.748 inch	COPPER		2			250 V	e4	90 deg	M19P1	.217 inch
SK13EAW01	Nkk Switches	KEYLOCK SWITCH	PANEL MOUNT	SPDT	KEYLOCK	ON-OFF-ON		1A@250VAC	SILVER	ZINC DIE CAST		1500VAC		10000 Cycle(s)	1000000000 ohm				EPOXY		BREAK-BEFORE-MAKE	PHENOLIC	SILVER	22.5044 mm			70 Cel	1 A		-10 Cel	.118 inch	Tin (Sn)	CIRCULAR		SOLDER LUG			10 mohm				3		KEY REMOVES AT POSITION 2	250 V	e3	45 deg	M12P1	.177 inch
2SKF131AEL01	TE Connectivity	KEYLOCK SWITCH	PANEL MOUNT	SPST		OFF-ON		1A@120VAC			90 deg			10000 Cycle(s)						1	MAKE-BEFORE-BREAK			29.5 mm			85 Cel	1 A	SILVER	-30 Cel			LATCHED	1 A	WIRE	1		50 mohm							120 V
AML27ABK2AC21BA	Honeywell Sensing And Control	KEYLOCK SWITCH	PANEL MOUNT	DPDT												18.92 mm	18.92 inch			1				36 mm	2A@24VDC								LATCHED	2 A	SOLDER/QUICK CONNECT	2	AML27						24 V				90 deg
CKL12BTW01	Nkk Switches	KEYLOCK SWITCH	PANEL MOUNT	SPDT	KEYLOCK	ON-ON	HAND	3A@250VAC	SILVER	ZINC ALLOY		1500VAC	COPPER ALLOY	10000 Cycle(s)	1000000000 ohm	21.9964 mm		.669 inch	EPOXY		BREAK-BEFORE-MAKE	LIQUID CRYSTAL POLYMER	SILVER	29.083 mm			70 Cel	3 A	COPPER	-25 Cel	.213 inch	SILVER			SOLDER LUG			20 mohm	.748 inch	COPPER		2			250 V	e4	90 deg	M19P1	.217 inch
SK12BAW01	Nkk Switches	KEYLOCK SWITCH	PANEL MOUNT	SPDT	KEYLOCK	ON-ON		3A@125VAC	SILVER	ZINC DIE CAST		1500VAC		10000 Cycle(s)	1000000000 ohm	10.8 mm			EPOXY	1	BREAK-BEFORE-MAKE	PHENOLIC	SILVER	22.5 mm			70 Cel	3 A		-10 Cel	.118 inch		LATCHED		SOLDER LUG			10 mohm				2		KEY REMOVES AT POSITION 1	125 V		90 deg	M12P1	.177 inch
A018325	Apem Components	KEYLOCK SWITCH	PANEL MOUNT	DPDT												18 mm	18 inch		IP40	1													LATCHED		SOLDER	2
A0151B	Apem Components	KEYLOCK SWITCH	PANEL MOUNT	SPDT	KEYLOCK			6A@250VAC	GOLD					50000 Cycle(s)	50000000 ohm	30.7 mm	18 inch		IP65	1			GOLD		6A@12VDC		55 Cel	6 A	SILVER	-20 Cel			LATCHED	6 A	SOLDER	1		10 mohm		SILVER	8	2	12 V		250 V					STEEL
CKM12ATW01	Nkk Switches	KEYLOCK SWITCH	PANEL MOUNT	SPDT	KEYLOCK	ON-ON	HAND	3A@250VAC	SILVER	GLASS FILLED POLYBUTYLENE TEREPHTHALATE		1500VAC	COPPER ALLOY	10000 Cycle(s)	1000000000 ohm	18.9992 mm		.63 inch	EPOXY		BREAK-BEFORE-MAKE	LIQUID CRYSTAL POLYMER	SILVER	26.2128 mm			70 Cel	3 A	COPPER	-25 Cel	.157 inch	SILVER			SOLDER LUG			20 mohm	.63 inch	COPPER		2			250 V	e4	90 deg	M16P1	.197 inch
1-1437597-7	TE Connectivity	KEYLOCK SWITCH	PANEL MOUNT	SPST		OFF-ON		1A@120VAC			90 deg			10000 Cycle(s)		23.1 mm				1	MAKE-BEFORE-BREAK			29 mm				1 A	SILVER				LATCHED	1 A	WIRE	1		50 mohm							120 V					BRASS
2SKF132AEL01	TE Connectivity	KEYLOCK SWITCH	PANEL MOUNT	SPST		OFF-ON		1A@120VAC			90 deg			10000 Cycle(s)						1	MAKE-BEFORE-BREAK			29.5 mm			85 Cel	1 A	SILVER	-30 Cel			LATCHED	1 A	WIRE	1		50 mohm							120 V
A018206	Apem Components	KEYLOCK SWITCH	PANEL MOUNT	DP3T												18 mm	18 inch		IP40	1													MOMENTARY		SOLDER	2	A01
CKM13ETW01	Nkk Switches	KEYLOCK SWITCH	PANEL MOUNT	SPDT	KEYLOCK	ON-OFF-ON	HAND	3A@250VAC	SILVER	GLASS FILLED POLYBUTYLENE TEREPHTHALATE		1500VAC	COPPER ALLOY	10000 Cycle(s)	1000000000 ohm	18.9992 mm		.63 inch	EPOXY		BREAK-BEFORE-MAKE	LIQUID CRYSTAL POLYMER	SILVER	26.2128 mm			70 Cel	3 A	COPPER	-25 Cel	.157 inch	SILVER			SOLDER LUG			20 mohm	.63 inch	COPPER		3			250 V	e4	45 deg	M16P1	.197 inch
Y100AA2C203NQE	C & K Components	KEYLOCK SWITCH	PANEL MOUNT		KEYLOCK			2A@250VAC	SILVER	GLASS FILLED POLYESTER		1000VRMS	COPPER	10000 Cycle(s)	1000000000 ohm							GLASS FILLED POLYESTER	SILVER		4A@28VDC	STAINLESS STEEL		2 A	COPPER			SILVER		4 A	SOLDER LUG			10 mohm		COPPER		3	28 V		250 V	e4				ZINC ALLOY
A018101	Apem Components	KEYLOCK SWITCH	PANEL MOUNT	DPDT												18 mm	18 inch		IP40	1													LATCHED		SOLDER	2
CKM13EFW01	Nkk Switches	KEYLOCK SWITCH	PANEL MOUNT	SPDT	KEYLOCK	ON-OFF-ON	HAND	3A@250VAC	SILVER	GLASS FILLED POLYBUTYLENE TEREPHTHALATE		1500VAC	COPPER ALLOY	10000 Cycle(s)	1000000000 ohm	18.9992 mm		.63 inch	EPOXY		BREAK-BEFORE-MAKE	LIQUID CRYSTAL POLYMER	SILVER	26.2128 mm			70 Cel	3 A	COPPER	-25 Cel	.157 inch	SILVER			SOLDER LUG			20 mohm	.63 inch	COPPER		3			250 V	e4	45 deg	M16P1	.197 inch
SK13EDW01	Nkk Switches	KEYLOCK SWITCH	PANEL MOUNT	SPDT	KEYLOCK	ON-OFF-ON	HAND	3A@125VAC	SILVER	ZINC ALLOY		1500VAC		10000 Cycle(s)	1000000000 ohm			.512 inch	EPOXY		BREAK-BEFORE-MAKE	PHENOLIC	SILVER	11.7094 mm			70 Cel	3 A		-25 Cel	.138 inch				SOLDER LUG		SK	10 mohm	.425 inch			1			125 V		45 deg	M12P1	.177 inch
Y100AA2C203NQ	C & K Components	KEYLOCK SWITCH	PANEL MOUNT		KEYLOCK			2A@250VAC	SILVER	GLASS FILLED POLYESTER		1000VRMS	COPPER	10000 Cycle(s)	1000000000 ohm							GLASS FILLED POLYESTER	SILVER		4A@28VDC	STAINLESS STEEL		2 A	COPPER			SILVER		4 A	SOLDER LUG			10 mohm		COPPER		3	28 V		250 V	e4				ZINC ALLOY
AML27ABK2BA21BA	Honeywell Sensing And Control	KEYLOCK SWITCH	PANEL MOUNT	SPDT				.1A@125VAC								18.92 mm	18.92 inch			1				36 mm	.1A@125VDC			.1 A					LATCHED	.1 A	SOLDER/QUICK CONNECT	2	AML27						125 V		125 V		90 deg
AML27ABK2AA21BA	Honeywell Sensing And Control	KEYLOCK SWITCH	PANEL MOUNT	SPDT												18.92 mm	18.92 inch			1				36 mm	2A@24VDC								LATCHED	2 A	SOLDER/QUICK CONNECT	2	AML27						24 V				90 deg
A22TK-2RL-03-K08	Omron	KEYLOCK SWITCH	PANEL MOUNT	3PST	KEYLOCK	ON-OFF		10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW	2			1.18 inch			2	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2LR-11-K25	Omron	KEYLOCK SWITCH	PANEL MOUNT	DPST	KEYLOCK			10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW	2			1.18 inch			2	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2RL-01-27	Omron	KEYLOCK SWITCH	PANEL MOUNT	SPST	KEYLOCK	ON-OFF		10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW				1.18 inch			1	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2RL-21-K14	Omron	KEYLOCK SWITCH	PANEL MOUNT	DPST	KEYLOCK			10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW	2			1.18 inch			2	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2RR-12-K08	Omron	KEYLOCK SWITCH	PANEL MOUNT	DPST	KEYLOCK			10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW	2			1.18 inch			2	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2RR-03-K18	Omron	KEYLOCK SWITCH	PANEL MOUNT	3PST	KEYLOCK	ON-OFF		10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW	2			1.18 inch			2	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2LR-02-K20	Omron	KEYLOCK SWITCH	PANEL MOUNT	DPST	KEYLOCK	ON-OFF		10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW	2			1.18 inch			2	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2RL-02-12	Omron	KEYLOCK SWITCH	PANEL MOUNT	DPST	KEYLOCK	ON-OFF		10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW				1.18 inch			2	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2RR-11-K18	Omron	KEYLOCK SWITCH	PANEL MOUNT	DPST	KEYLOCK			10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW	2			1.18 inch			2	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2LL-02-K25	Omron	KEYLOCK SWITCH	PANEL MOUNT	DPST	KEYLOCK	ON-OFF		10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW	2			1.18 inch			2	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2LR-01-11	Omron	KEYLOCK SWITCH	PANEL MOUNT	SPST	KEYLOCK	ON-OFF		10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW				1.18 inch			1	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2LR-12-K03	Omron	KEYLOCK SWITCH	PANEL MOUNT	DPST	KEYLOCK			10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW	2			1.18 inch			2	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2LR-12-09	Omron	KEYLOCK SWITCH	PANEL MOUNT	DPST	KEYLOCK			10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW				1.18 inch			2	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2LR-02-30	Omron	KEYLOCK SWITCH	PANEL MOUNT	DPST	KEYLOCK	ON-OFF		10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW				1.18 inch			2	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2RL-01-K12	Omron	KEYLOCK SWITCH	PANEL MOUNT	SPST	KEYLOCK	ON-OFF		10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW	2			1.18 inch			1	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2LL-02-23	Omron	KEYLOCK SWITCH	PANEL MOUNT	DPST	KEYLOCK	ON-OFF		10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW				1.18 inch			2	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2LR-03-20	Omron	KEYLOCK SWITCH	PANEL MOUNT	3PST	KEYLOCK	ON-OFF		10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW				1.18 inch			2	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2LL-01-25	Omron	KEYLOCK SWITCH	PANEL MOUNT	SPST	KEYLOCK	ON-OFF		10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW				1.18 inch			1	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2RL-21-K20	Omron	KEYLOCK SWITCH	PANEL MOUNT	DPST	KEYLOCK			10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW	2			1.18 inch			2	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg
A22TK-2RR-01-10	Omron	KEYLOCK SWITCH	PANEL MOUNT	SPST	KEYLOCK	ON-OFF		10A@110VAC				2500VAC		100000 Cycle(s)	100000000 ohm	34 mm	34 inch		IP65	1				47.8 mm	10A@24VDC		70 Cel	10 A		-20 Cel	1.284 inch		LATCHED	10 A	SCREW				1.18 inch			1	24 V	APPROVALS: CCC; CUL; TUV; UL	110 V		90 deg

Keylock Switches

Keylock switches are electrical switches that require a key to operate. They are commonly used in security applications to control access to equipment or systems, such as in alarm systems or electrical cabinets.

Keylock switches typically consist of a metal or plastic housing, a key cylinder, and a set of electrical contacts. The key cylinder is used to lock or unlock the switch, while the electrical contacts are used to make or break the connection between the switch terminals.

Keylock switches come in different configurations, including single-pole, double-pole, and multiple-pole switches. They also come in different keying options, such as keyed alike, keyed different, or master-keyed.

Keylock switches offer several advantages over other types of switches. They provide a secure and reliable means of controlling access to equipment or systems. They are also easy to install and operate, and they can be used in a wide range of applications.