Type K Thermocouples

Versatile and Cost-Effective Concrete Temperature Sensor

The type K thermocouple sensor measures temperature at the tip of the cable and is intended for concrete temperature and strength monitoring. Install the thermocouple, connect it to the Maturix transmitter and the temperature data will be sent continuously to the cloud. Read more…

Product Versions

Ready-to-Use Sensors

Type K thermocouple sensor, ready-to-use (prepared with connector and tip protector)

Available lengths:

Self-Assembly Parts

Type K thermocouple cable roll and connectors, for self-assembly

Available parts:

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The cable consists of two durable conductors. It is insulated with PTFE (Teflon), which has excellent abrasion, flame, and humidity resistance. The cable is designed to be both strong and with high flexibility so that it is suitable for multiple purposes. The connector is the standard male type K miniature with flat pins that allows easy connection to the transmitter.

Type K thermocouples are simple to use, versatile, and cost-effective temperature sensors ideal for concrete monitoring. Our thermocouples are available as ready-to-use sensors (1m / 3m / 5m / 10m) or as parts for self-assembly (100m cable roll and connectors).

Compatible Transmitters

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Title	Specifications
Temperature Measurements
Range	-25 to 125 °C (-13 to 257 °F) ¹
Tolerance	±1.5 °C (±2.7 °F)
Thermocouple Class	Class 1
Use and Storage
Temperature	-25 to 125 °C (-13 to 257 °F) ¹
Ideal Storage Conditions	Indoor, 20 to 30 °C (68 to 86 °F)
Mechanical Specifications
Cable Length	Ready-to-use cables: 1, 3, 5, 10 meters Self-assembly roll: 100 meter
Cable Shape	Flat pair
Cable Thickness	2.5 x 1.5 mm (0.1 x 0.06 in)
Conductor Thickness	7/0.12, 0.2 mm²
Connector Dimensions (L x W x H)	32 x 17 x 8 mm (1.26 x 0.67 x 0.31 in)
Connector Type	Miniature, type K, male, flat pins
Materials	Cable, conductors: Ni-Cr / Ni-Al Cable, jacket: Teflon/PTFE (blue) Cable, tip protector: Polyolefin (black) Connector, ready-to-use: Nylon (yellow) Connector, self-assembly: Nylon (green)

¹ Can be extended to 250 °C without the tip protector. The tip must not be in contact with conducting materials like metals.

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What is a thermocouple and how does it work?

Thermocouples consist of two wires, of different types of metal, that are joined together in the end. This junction is where the temperature is measured (the tip of the thermocouple). When the junction is heated or cooled, a tiny current is created, and this can be used to calculate the temperature inside the concrete.

See this video to learn more: What is a Thermocouple and how does it work? Explained
Why should I use thermocouples for measuring concrete temperature?

Type K thermocouples are simple to use, versatile, widely available, and cost-effective temperature sensors – ideal for concrete monitoring.
How do I install thermocouples?

Learn how to install thermocouples here…
Where do I position the thermocouples?

In general, temperature sensors should be positioned at critical locations such as the core, surfaces, outer faces, and corners. The typical positions are often: Core (hot), surface (cold), close to the formwork, and ambient air temperature.

For larger projects, the monitoring positions are often described in a thermal control plan defined by consulting engineers or concrete technologists.
What is the accuracy of your type K thermocouples?

±1.5 °C (±2.7 °F)
What is the temperature range of your type K thermocouples?

-25 to 125 °C (-13 to 257 °F)
Which thermocouples can I use with the Maturix transmitters?

You can use type K thermocouples with the Maturix Transmitters (Gaia 200 / Orbit K).

Other types of thermocouples are not supported.
Which lengths thermocouples do you sell?

We offer ready-to-use sensors in 1m / 3m / 5m / 10m. We also offer 100m cable rolls and connectors, so you can cut and assemble the cables in your desired lengths.
Can I use my own thermocouples?

Yes, as long as they are type K.
Why should I purchase your type K thermocouples?

They are accurate and of high quality. The cable sheath is made of Teflon, which makes it more resistant to breaks and damages. This also provides a perfect combination of flexibility and stiffness for easy installation.
Can I reuse the thermocouple?

Yes. Remove the insulation at the end of the cable, twist the two conductors tightly around each other, and put some heat-shrink tubing around to avoid wrong readings.
What is the black thing at the end (of the ready-to-use cables)?

Heat-shrink tubing. This protects the exposed thermocouple wires and reduces reading errors.

We strongly recommend that you insulate your self-assembled sensors with heat-shrink tubing!
Can I disconnect the thermocouple during monitoring and reconnect it later?

No. The thermocouple must be connected to a transmitter at all times during monitoring.
I have problems with my temperature readings. What could cause this?

Checking our troubleshooting article.

If you are still struggling, contact support@maturix.com.

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Help Center Articles

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Learn how to install thermocouples here…

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Part No.	Name	Description
Ready-to-Use Sensors
31001-010	Thermocouple, type K, 1 meter - Pack of 10 pieces	Ready-to-use sensor
31001-100	Thermocouple, type K, 1 meter - Pack of 100 pieces	Ready-to-use sensor
31003-010	Thermocouple, type K, 3 meter - Pack of 10 pieces	Ready-to-use sensor
31003-050	Thermocouple, type K, 3 meter - Pack of 50 pieces	Ready-to-use sensor
31005-005	Thermocouple, type K, 5 meter - Pack of 5 pieces	Ready-to-use sensor
31005-025	Thermocouple, type K, 5 meter - Pack of 25 pieces	Ready-to-use sensor
31010-001	Thermocouple, type K, 10 meter - 1 piece	Ready-to-use sensor
31010-010	Thermocouple, type K, 10 meter - Pack of 10 pieces	Ready-to-use sensor
Self-Assembly Parts
31100-001	Thermocouple, type K, 100 meter wire	Cable roll for self-assembly
32005-010	Thermocouple Connector, type K, custom connector	Miniature type K male connector
36000-001	Heat-Shrink Tubing, 10 meters	Shrinkable plastic tube to insulate thermocouple tip