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Rotary Thermocouple Selector Switches

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Data Sheet (PDF)

$367.35

Item# SW144-20-B

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Quantity	Price each
1-9	$367.35
10-49	$337.96
50-99	$319.59
100-999	$301.23
1000-4999	$282.86
5000+	$264.49

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Lead Time (If not in stock): 6 weeks

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3", 5" and 1/4 DIN Sizes
Gold or Silver Plated Contacts
2 or 3 Poles in 76 mm (3") and 127 mm (5") sizes
2, 3, or 4 Poles in 1/4 DIN Size
2 to 34 Positions
Wire Connecting Screws Included

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SW144-20-B Model Options

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Edit these specs to order a different model. Not all combinations are valid. Options compatible with previous selections will be in bold.

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Maximum Number of Positions

Switch Type

Contact Material

Contact Action

Form Factor

Specs

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For isothermal, low resistance switching of temperature measurement circuits, OMEGA offers three styles of selector switches. The OSW style features silver plated contacts, while the OSWG line includes gold plated contacts. The SW14 1/4 DIN switches come with gold or silver-plated contacts. Each style offers 2 to 34 positions in a break-resistant Noryl case.
The isothermal design of these rotary switches minimizes temperature gradients between the input and output thermocouple wiring. This in turn minimizes errors in transmitting thermocouple signals due to the generation of a thermal emf at the wire junctions. The low resistance of the silver or gold plated contacts also enables switching of temperature sensitive resistance devices, such as RTDs and thermistors.
Two pole SW and OSW series switches have a convenient . off. position. The . off. position may be left as an open circuit or shorted to keep spurious signals from registering on thermocouple instruments.Each pole is fully isolated. For quick and easy wiring, the terminals located at the rear of the switch are clearly marked.

OMEGA is pleased to offer a rotary selector switches in a 1/4 DIN size. Like our other rotary selector switches, this model is available with Break Before Make and Make Before Break contact action. Models are available with 2 to 34 positions in 2, 3 or 4 pole versions. The 1/4 DIN switch also has . jab-in. style connections.

No. of Poles	Contact Action	Size	No. of Positions	Silver-Plated Contacts Model No.	Gold-Plated Contacts Model No.
2 Pole includes off	Break Before Make	3'	2	OSW3-2	OSWG3-2
			3	OSW3-3	OSWG3-3
			4	OSW3-4	OSWG3-4
			5	OSW3-5	OSWG3-5
			6	OSW3-6	OSWG3-6
			8	OSW3-8	OSWG3-8
			9	OSW3-9	OSWG3-9
			10	OSW3-10	OSWG3-10
	Make Before Break	3'	12	OSW3-12	OSWG3-12
			14	OSW3-14	OSWG3-14
			16	OSW3-16	OSWG3-16
			18	OSW3-18	OSWG3-18
			20	OSW3-20	OSWG3-20
		5'	24	OSW5-24	OSWG5-24
			28	OSW5-28	OSWG5-28
			30	OSW5-30	OSWG5-30
			32	OSW5-32	OSWG5-32
			36	OSW5-36	OSWG5-36
			40	OSW5-40	OSWG5-40
3 Pole NO off	Make Before Break	5'	6	OSWT-6	OSWGT-6
			10	OSWT-10	OSWGT-10
			12	OSWT-12	OSWGT-12
			18	OSWT-18	OSWGT-18
			20	OSWT-20	OSWGT-20
			24	OSWT-24	OSWGT-24
			28	OSWT-28	OSWGT-28
			30	OSWT-30	OSWGT-30
			32	OSWT-32	OSWGT-32
			36	OSWT-36	OSWGT-36
			40	OSWT-40	OSWGT-40

1/4 DIN Units
No. of Poles	No. of Positions	Silver-Plated Contacts Model No.	Gold-Plated Contacts Model No.
2 includes off Positon	2	SW142-2-(*)	SW142G-2-(*)
	4	SW142-4-(*)	SW142G-4-(*)
	6	SW142-6-(*)	SW142G-6-(*)
	8	SW142-8-(*)	SW142G-8-(*)
	10	SW142-10-(*)	SW142G-10-(*)
	12	SW142-12-(*)	SW142G-12-(*)
	16	SW142-16-(*)	SW142G-16-(*)
	18	SW142-18-(*)	SW142G-18-(*)
	20	SW142-20-(*)	SW142G-20-(*)
	24	SW142-24-(*)	SW142G-24-(*)
	30	SW142-30-(*)	SW142G-30-(*)
	34	SW142-34-(*)	SW142G-34-(*)
3 NO off Positon	2	SW143-2-(*)	SW143G-2-(*)
	4	SW143-4-(*)	SW143G-4-(*)
	6	SW143-6-(*)	SW143G-6-(*)
	8	SW143-8-(*)	SW143G-8-(*)
	10	SW143-10-(*)	SW143G-10-(*)
	12	SW143-12-(*)	SW143G-12-(*)
	16	SW143-16-(*)	SW143G-16-(*)
	18	SW143-18-(*)	SW143G-18-(*)
	20	SW143-20-(*)	SW143G-20-(*)
	24	SW143-24-(*)	SW143G-24-(*)
	30	SW143-30-(*)	SW143G-30-(*)
	34	SW143-34-(*)	SW143G-34-(*)
4 NO off Positon	2	SW144-2-(*)	SW144G-2-(*)
	4	SW144-4-(*)	SW144G-4-(*)
	6	SW144-6-(*)	SW144G-6-(*)
	8	SW144-8-(*)	SW144G-8-(*)
	10	SW144-10-(*)	SW144G-10-(*)
	12	SW144-12-(*)	SW144G-12-(*)
	16	SW144-16-(*)	SW144G-16-(*)
	18	SW144-18-(*)	SW144G-18-(*)
	20	SW144-20-(*)	SW144G-20-(*)
	24	SW144-24-(*)	SW144G-24-(*)
	30	SW144-30-(*)	SW144G-30-(*)
	34	SW144-34-(*)	SW144G-34-(*)

* Specify contact action: 'B' = Break Before Make, 'M' = Make Before Break.

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Manuals & Downloads

Manuals & Guides (1)

M1940 user manual

Data Sheet (1)

OSW-SW14_spec

Questions & Answers

Is the OSW3-12 waterproof?

Asked by: Dave74

Thank you for your inquiry Dave74. No, OSW3-12 is not waterproof.

Answered by: Application Engineer SP

Date published: 2022-08-03

I'm looking for a rotary selector switch to allow me to calibrate the input of a multi channel thermocouple recorder without interrupting the other signals going in, approx 30 inputs. I'm not clear if the switches listed will isolate 1 & pass thru rest

Asked by: Andrew awa

Best to call our engineering group to discuss.

Answered by: NJENG

Date published: 2021-07-15

Hi, Can you please advice the Environmental specification for the switch OSW-SW14, I mean what temperature and Vibration spec this part will meet.

Asked by: Vaishnavi

Hi Vaishnavi Thank you for the inquiry. Continuous use max temperature is 110 C. We do not advise use where vibration is present. We do not have a vibration rating on this product series. Best regards OMEGA

Answered by: NorwalkAE

Date published: 2020-06-07