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SPIR
Fine Diameter Bare Thermocouple Wire
Models In Stock
- In Stock for Fast Delivery
- Popular sizes from .001 to .064 Inches
- 50, 100, 500, 1,000 Foot Spools
SPIR
From
$
31.71
Models In Stock
Product Overview
- Insulation Uninsulated
- Overbraiding Type None
- Series ID SPIR
- Temperature Sensor Type Thermocouple
- Wire Type Solid
Supported Applications
The Omega SPIR series consists of fine diameter, uninsulated thermocouple wires designed for temperature measurement applications requiring base metal types J, K, T, N, and E. These bare wire elements are supplied as single legs or matched pairs to facilitate the construction of custom sensors or extension wiring in configurations where insulation is not required.
Operating Conditions & Performance
The series covers a diameter range from 0.013 mm (0.0005") to 3.25 mm (0.128"). Standard stock lengths are provided on 76 mm (3") plastic spools with an overall length of 15 m (50'). The product overview notes that additional sizes and quantities are available upon special request.
Configuration Options
The SPIR series is configurable across multiple thermocouple types, wire diameters, and leg configurations. Selection involves specifying the material type, diameter code, and length suffix where applicable.
- Thermocouple Types: Type J (Iron/Constantan), Type K (CHROMEGA®/ALOMEGA®), Type T (Copper/Constantan), Type N (OMEGA-P Nicorosil/OMEGA-N Nisil), and Type E (CHROMEGA®/Constantan).
- Wire Diameters: Available from 0.013 mm to 3.25 mm.
- Packaging: Supplied on 76 mm (3") plastic spools in standard lengths of 15 m (50').
- Configuration Options: Wires are offered as single legs or matched pairs. When ordering matched pairs, specific part number combinations must be used to ensure correct material pairing.
Key Product Differences
The series utilizes distinct model prefixes and suffixes to identify the thermocouple type and wire diameter.
- Type J: SPIR for Iron; SPCI for Constantan.
- Type K: SPCH for CHROMEGA®; SPAL for ALOMEGA®.
- Type T: SPCP for Copper.
- Type N: SPOP for OMEGA-P (Nicorosil); SPON for OMEGA-N (Nisil).
- Type E: SPCH for CHROMEGA®; SPCC for Constantan.
Material Pairing Note: There are two forms of Constantan with differing constituent element percentages. One form is matched to Iron (SPCI), while the other matches Copper or CHROMEGA® (SPCC). Correct pairing requires specifying SPCI with SPIR, and SPCC with either SPCP or SPCH.
Show Ratings & Reviews
Rated 4 out of
5
by
mwbailey from
Met specifications
Pursued copper wire as closest option to model HO scale fence line. May be too fragile to use and tend to curl!!
Date published: 2018-02-04
Rated 5 out of
5
by
hjones6 from
Wires for self-building thermocouples
Arrived promptly. Very happy with purchase. Good selection.
Date published: 2025-08-14
Rated 5 out of
5
by
hjones6 from
Thermocouple wire for university research
Quality product. Arrived promptly. Very happy with purchase.
Date published: 2025-08-14
Rated 5 out of
5
by
Michelle from
Never any issues
Been buying this from Omega for a long time. The department that uses it never complains about it
Date published: 2021-02-11
Rated 5 out of
5
by
Aerohead Maint from
Test Wire
Bought for testing and worked great, needed ASAP and delivery was on time
Date published: 2017-03-27
Rated 5 out of
5
by
Bruce39 from
Normal high standard.
There is nothing new with this order. There was the same high standard of service and product that I have received with hundreds of orders over 50 years.
Date published: 2016-07-11
How best to connect a fine gauge K-type thermocouple wire (say 40 AWG) to a DAQ box which has a screw pressure contact. Is there a crimp you recommend
It is best to call our engineers to review possible options.
Date published: 2024-12-23
I want to use J thermocouple wire without a probe (by twisting the ends of the stripped wires together) to measure the temperature of a curing polyurethane elastomer. I have been told that method is not valid. Is it? Thanks.
Twisting the wires does create a Thermocouple junction and senses at the point were the two wires first touch each other. This is a crude way to do this and the accuracy would not be truly known and should only be used in applications that have a very loose accuracy tolerance.
Date published: 2020-08-08