Handheld K-Type Armored Thermocouple and Digital Thermometer

Introduction

The ZYLAB Handheld K-Type Armored Thermocouple is a high-precision temperature sensing instrument designed for accurate furnace temperature calibration and measurement. It is widely used in high-temperature tube furnaces, muffle furnaces, and laboratory sintering systems.
This thermocouple adopts a composite armored structure with reinforced protection tubes and advanced surface modification treatment, providing excellent durability and long service life even under harsh conditions.

When paired with a ZYLAB digital thermometer, this handheld thermocouple allows real-time monitoring and precise verification of the actual temperature inside the furnace chamber — ensuring the accuracy of the temperature displayed by the main control system.

Key Features

• Wide Measuring Range: 0–1300°C continuous measurement; ideal for long-term operation between 0–1200°C.

• High Accuracy: Enables precise comparison between handheld readings and furnace display temperatures.

• Reinforced Protection Tube: Wear-resistant, oxidation-resistant, and anti-sulfidation design for extended thermocouple life.

• Customizable Design: Insertion depth and sheath diameter can be tailored to specific furnace types and applications.

• Reliable Construction: The composite armored tube structure ensures stability and prevents temperature lag during measurement.

Applications：

• Furnace temperature calibration and verification

• High-temperature sintering process monitoring

• Laboratory and industrial furnace testing

• Metallurgical and materials research

• Thermal process development in R&D laboratories

Example：

• Insert alumina tube plugs at both ends of the furnace tube.

• Insert the K-type armored thermocouple probe through the alumina plug’s center hole into the middle of the furnace chamber (the area with the highest sintering temperature).

• Connect the thermocouple to the handheld digital thermometer.

• On the furnace’s monitoring interface, input the sintering temperature curve.

  • Example: Set the target temperature to 400°C, heat for 40 minutes, and hold for 60 minutes.

  • During the hold stage, record the temperature from the handheld thermometer when the reading stabilizes.

  • Example result:

    • Handheld thermometer: 395°C

    • Furnace display: 400°C

    • Temperature deviation: 5°C

    • The same accuracy is achieved for 500°C and 600°C, confirming stable measurement reliability.