
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 the Orbit K?
The Orbit K is an electronic device that records temperature and wirelessly sends it to the cloud. The temperature is measured using type K thermocouples and the readings can be viewed online in one of our web portals.
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Do I need to be at the job site to access the data?
No – and that is the smart thing! You can access the temperature readings from your computer or smartphone at any time, anywhere. Once you have installed the equipment, you can follow the temperature and strength development online in real-time.
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How is the data transferred to the cloud?
The data is sent using Sigfox. Sigfox is a wireless network designed to connect smart devices to the cloud. It benefits from longer range than Bluetooth and WiFi, and you can set up a Sigfox Gateway at your job site to create coverage – even at remote locations.
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How is the installation done?
Installation is quick and simple. Secure the thermocouple to the rebar, connect it to the Orbit K, and place the transmitter at a secure location. When a thermocouple is connected, the Orbit K transmits data every 10 minutes automatically.
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What is embedded into the concrete?
It is only the inexpensive thermocouple that is embedded into the concrete. The transmitter is mounted next to the cast and can be reused for multiple monitorings. This not only gives a great flexibility, but also keeps the costs per monitoring down.
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What is the battery lifetime of Orbit K?
The battery lifetime depends on the usage and the conditions. When the thermocouple is inserted 24/7, the battery lifetime is up to 8 months before it needs to be sent to service. We guarantee 20.000 measurements or 8 months operation (whichever comes first).
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How many Orbit K do I need?
This depends on the project. The Orbit K is a single-channel transmitter, which means that you can connect one thermocouple per device. Consider the amount of monitoring positions you will need to measure (at the same time) and you know how many devices you will need.
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How do I change the batteries in the Orbit K?
You can’t change or replace the batteries in the Orbit K yourself. The Orbit K transmitter contains high-quality, industrial lithium batteries, which are non-rechargeable and non-replaceable.
We can help swap the batteries in your devices to new and fresh cells. Contact your reseller regarding battery service.
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Is the Orbit K waterproof?
Yes, the Maturix™ transmitter is dust- and waterproof.
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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.
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
Casper Harlev
