
Type K Thermocouples
Versatile and cost-effective concrete temperature sensor
The Type K Thermocouples are sensors that measure temperature at the cable’s tip and are intended for concrete temperature and strength monitoring. You’ll firstly have to install the thermocouple and then connect it to a Maturix transmitter, after which the temperature data will be sent continuously to the cloud.

- Measure temperature at any position in your structures
- Industry-standard temperature sensor
- Compatible with Maturix transmitters
- Ready-to-use sensors or self-assembly parts
- High resistance and durability
- Ideal for concrete monitoring
Product versions

Ready-to-use sensors
Type K thermocouple sensor, ready-to-use (prepared with connector and tip protector)
- Convenient and time-saving
Available lengths:
- 1m / 3m / 5m / 10m

Self-assembly parts
Type K thermocouple cable roll and connectors, for self-assembly
- Flexible lengths
Available parts:
- 100m cable roll, connectors, heat-shrink tubing
The Type K Thermocouples are sensors that measure temperature at the cable’s tip and are intended for concrete temperature and strength monitoring. You’ll firstly have to install the thermocouple and then connect it to a Maturix transmitter, after which the temperature data will be sent continuously to the cloud.
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 highly flexible; therefore, it is suitable for multiple purposes. The connector is the standard male type K miniature with flat pins that allow easy transmitter connection.
Available thermocouples
Type K thermocouples are simple to use, versatile, and cost-effective temperature sensors, therefore 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
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 | |
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 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; This is therefore used to calculate the temperature inside the concrete.
See the following video to learn more: What is a Thermocouple and how does it work? Explained
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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?
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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.
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What is the accuracy of your type K thermocouples?
±1.5 °C (±2.7 °F)
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What is the temperature range of your type K thermocouples?
-25 to 125 °C (-13 to 257 °F)
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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.
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Can I use my own thermocouples?
Yes, as long as they are type K.
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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 damage. This also provides a perfect combination of flexibility and stiffness for easy installation.
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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.
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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.
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I have problems with my temperature readings. What could cause this?
Checking our troubleshooting article.
If you are still struggling, contact [email protected].
Help center articles
Downloads
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 |

Get in contact with
Alina Hurciuc
