measuring the temperature distribution of the furnace

Precise measurements of the temperature distribution in the furnace: SAT and TUS tests

In the aerospace, automotive and many other industries, heat treatment is a key process that affects the quality and durability of products. In order to ensure the reproducibility and safety of the process, it is necessary to regularly inspect measuring instruments, as well as to carry out SAT and TUS tests. In this article, we will discuss what they consist of and introduce the JUMO range. Read on!

Heat treatment processes

During heat treatment processes in industrial furnaces, it is crucial to maintain certain parameters, such as temperature, as well as heating and cooling rates. To ensure the repeatability and accuracy of the process, it is essential that these parameters are carefully monitored using appropriate temperature sensors and measuring devices, as well as regular calibration and testing. This is particularly important in industries requiring precise measurements, such as aerospace and automotive.

Standards AMS2750 and CQI-9 – Heat treatment requirements in the aerospace and automotive industries

In the aerospace industry, standards such as AMS2750E (NADCAP) and company guidelines and procedures based on it and derived standards are used. Their use is intended to ensure the quality of the heat treatment process and compliance with the requirements of the customers who carry out inspection audits.

Similar requirements apply to manufacturers in the automotive industry, who must comply with standards defining heat treatment parameters, such as CQI-9. These standards also impose the need for cyclic measurements of industrial furnace parameters, by means of the System Accuracy Test (SAT), or the Temperature Uniformity Test (TUS).

Read more about the importance of the CQI9 standard in the automotive industry here:


In a blog post, we explain the practical implications of the CQI-9 standard

TUS temperature uniformity test

The Temperature Uniformity Test (TUS) is a key tool in the quality control process during heat treatment. The TUS test involves accurately measuring the temperature distribution throughout the furnace workspace to identify hot and cold spots. In this way, heat treatment parameters can be adjusted to ensure an even temperature distribution in the furnace.

In order to ensure that the heat treatment processes comply with the specified quality requirements and the reproducible quality of the manufactured products, it is necessary to regularly check the measuring equipment and record the measurement results in detail. This will ensure that the heat treatment processes are carried out in accordance with the quality requirements and that the quality of the manufactured products is stable and reproducible.

SAT system accuracy test

The System Accuracy Test (SAT) is another key tool in the quality control process during heat treatment. SAT involves conducting thorough tests of the system's measurement consistency to ensure that the measuring equipment is accurate and reliable. The SAT test allows early detection of faults or inconsistencies in the measurement system, which can prevent plant failures and incorrect heat treatment results.

Our SAT and TUS test equipment allows up to 12 thermocouples to be connected simultaneously

JUMO offer - SAT and TUS tests

JUMO offers furnace temperature distribution measurement (TUS) and system measurement consistency (SAT) tests to identify hot and cold spots in the furnace and to ensure the repeatability of the production process. The measuring equipment is calibrated by experts in the DAkkS laboratory, in accordance with the specified quality requirements of the AMS2750 and CQI-9 standards.

Working with us ensures that customer requirements are met, complaints are minimised and plant failures are prevented. Our service team will take care of all tasks comprehensively, including recalibration planning and calibration certificates.

JUMO has the right software to generate clear reports