Synchronized Clocks | McMaster-Carr

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16 Products

Auto-Adjust Digital Clocks


Style A	Style B	Style C

Style D	Style E

Keep accurate time—these clocks automatically adjust for daylight saving time.

Calibration Certificate Traceable to NIST—Clocks with a NIST calibration certificate have been tested to NIST standards for accuracy.

Internal-Calendar Time Adjustment—Internal-calendar clocks keep track of the current date and time to make daylight saving time changes. They must be manually set at startup.

Ethernet Time Adjustment—Ethernet clocks receive power and time updates from your network, so they will automatically adjust for daylight saving time and can be synchronized with other clocks in your facility. Use a CAT5 or faster Ethernet cable to connect the clock to your Power over Ethernet (PoE) switch or to a power converter (sold separately).

Radio Signal Time Adjustment—Radio-signal clocks are also known as atomic clocks. They use the NIST atomic clock in Colorado to adjust for daylight saving time. These clocks receive a daily signal to recalibrate for accuracy.

	Clocks																			Adapters
													Batteries
	Style	Time Adjustment	Number Ht.	Ht.	Wd.	Dp.	Time Convention, hr.	Frame Material	Frame Color	Number Color	Electrical Connection Type	Cord Lg., ft.	Included	Size	No. Required	For Use Outdoors	Features		Each		Each
Battery Powered



		A	Radio Signal	2"	7 1/4"	9 3/4"	1"	12, 24	Plastic	Silver	Black	—	—	No	AAA	2	No	—	1091N17	000000	———	0


		Battery Powered with Calibration Certificate Traceable to NIST



				B	Radio Signal	4 1/2"	10 1/2"	16 1/2"	3/4"	12, 24	Plastic	Black	Black	—	—	Yes	AA	6	No	—	1091N18	000000	———	0


				Electric



						C	Internal Calendar	2 1/2"	6 1/4"	9 3/4"	1 1/2"	12, 24	Plastic	Black	Red	Plug In	5	—	—	—	No	Battery Backup	1091N15	000000	———	0


						D	Internal Calendar	4"	6"	14 1/2"	1 1/2"	12	Plastic	Black	Red	Plug In	5	—	—	—	No	Battery Backup	1091N16	000000	———	0


						Power-Over-Ethernet



								E	Ethernet	2 1/2"	5 1/8"	12 1/4"	2 1/2"	12, 24	Metal	Black	Red	—	—	—	—	—	No	—	1091N13	000000	1091N14	000000

Auto-Adjust Clocks


Style A	Style B	Style C

Style D	Style E	Style F

Style G

These clocks automatically adjust for daylight saving time.

Internal-Calendar Time Adjustment—Clocks with an internal calendar keep track of the current date and time to make daylight saving time changes. They must be manually set at startup.

Ethernet Time Adjustment and Wi-Fi Time Adjustment—Wi-Fi and ethernet clocks link to your network for time updates so they can be synchronized with other clocks in your facility. To operate ethernet clocks, use a CAT5 or faster ethernet cable to connect the clock to your power-over-ethernet switch or to a power converter (sold separately).

Radio Signal Time Adjustment—Radio signal clocks recalibrate their accuracy each day using a signal from the NIST atomic clock in Colorado. They’re also known as atomic clocks.

	Clocks																	Adapters
					Material							Batteries
	Style	Time Adjustment	Dia.	Time Convention, hr.	Frame	Lens	Frame Color	Dial Color	Number Color	Electrical Connection Type	Cord Lg., ft.	Included	Size	No. Required	For Use Outdoors		Each		Each
Battery Powered



		A	Internal Calendar	12 3/4"	12	Plastic	Plastic	Black	White	Black	—	—	No	AA	1	No	5771T11	000000	———	0


		B	Internal Calendar	14 1/4"	12	Plastic	Glass	Black	White	Black	—	—	No	AA	3	No	5771T18	00000	———	0
		C	Internal Calendar	16 1/2"	12	Plastic	Plastic	Black	White	Black	—	—	No	AA	1	No	5771T12	00000	———	0
		D	Radio Signal	12 3/4"	12	Plastic	Plastic	Black	White	Black	—	—	No	AA	1	No	5771T13	00000	———	0
		D	Radio Signal	16 1/2"	12	Plastic	Plastic	Black	White	Black	—	—	No	AA	1	No	5771T14	00000	———	0
		E	Wi-Fi	13 1/4"	12	Metal	Glass	Black	White	Black	—	—	Yes	AA	6	No	1102N22	000000	———	0
		E	Wi-Fi	13 1/4"	12	Plastic	Plastic	Black	White	Black	—	—	Yes	AA	6	No	1102N21	000000	———	0


		Electric



				F	Internal Calendar	13 1/4"	12	Metal	Glass	Black	White	Black	Plug In	5	—	—	—	No	8466T82	000000	———	0


				F	Internal Calendar	16 1/4"	12	Metal	Plastic	Black	White	Black	Plug In	5	—	—	—	No	8466T11	000000	———	0


				Power-Over-Ethernet



						G	Ethernet	15"	12	Metal	Plastic	—	White	Black	—	—	—	—	—	No	1091N12	000000	1091N14	000000