CT-203 High-Temperature Thermometer

The CT-203 is a temperature sensing rod designed for extremely high-temperature environments. It utilizes an alumina ceramic protective sheath, providing excellent heat resistance and insulation properties, making it suitable for high-temperature processes in metallurgy, heat treatment furnaces, glass kilns, and other similar applications. Its standard specifications support thermocouple R/S/K elements, and offer Class 1 or Class 2 accuracy options to meet the high stability and accuracy requirements of high-temperature temperature measurement applications.

Description

The CT-203 employs a ceramic protective sheath (Al₂O₃), maintaining probe structural stability and providing excellent insulation at extremely high temperatures. It supports sensing elements such as R-type and S-type thermocouples (up to 1600°C) and K-type thermocouples (up to 1250°C), all selectable with Class 1 or Class 2 accuracy. The probe structure features a simple and reliable two-wire connection. The standard tube diameter is 10 mm, with standard tube lengths of 500, 600, and 800 mm available. The connecting tube diameter is 14 mm. In addition to these standard specifications, the CT-203 also supports customization of components, lengths, and materials to meet various high-temperature field requirements.

Specifications

Sensing Element

Thermocouples: Types K, T, J, R, S, and B
Platinum resistors: PT100, PT1000, PT500

Accuracy Class

Class A, Class B, 1/10 DIN, 1/5 DIN, 1/3 DIN (select according to application)

Wiring Method

Thermocouple: 2-wire
PT100: 3-wire

Temperature Range (depending on the sensing element)

Type K thermocouple: Approximately –50°C to +1200°C
Type T thermocouple: Approximately –250°C to +350°C
J-type thermocouple: approx. –40°C ~ +750°C
R/S/B type thermocouple: approx. +600°C ~ +1600°C
PT100: –200°C ~ +500°C (depending on package and wire material)

Probe Appearance and Dimensions

Standard rod-shaped probe diameters: Φ3.2, Φ4.8, Φ5, Φ6.3 mm, Φ9.5 mm (custom sizes available)
Probe length: can be specified as needed (e.g., 30mm, 50mm, 100mm and above)

Ceramic tubes

Φ10, connecting pipe diameter Φ14.
For other specifications or customized options, please contact us for discussion.

Installation

The small T-joint makes it easy to connect and secure wires.

Selection of Probe Material

Material	Description
304SS	Stainless steel for general industrial use, with excellent corrosion resistance.
316SS	High corrosion-resistant stainless steel, suitable for chemical or humid environments.
310SS	High-temperature stainless steel with excellent heat resistance.
P4	High-purity ferritic alloy, resistant to high temperatures and corrosion.
INCONEL	Ultra-high temperature nickel-based alloy, resistant to oxidation and acidic environments.
Hastelloy-C	High corrosion resistant nickel-chromium alloy, resistant to strong acid environments.
Hastelloy-B	High acid resistance nickel-chromium-molybdenum alloy, suitable for extremely acidic environments.

Application Examples

Temperature detection of furnaces, ceramic kilns or high-temperature sintering equipment.
Metal heat treatment, annealing furnaces and metallurgical process monitoring.
Measurement of key temperature points in sintering furnaces and glass melting furnaces.
Protective temperature detection in scientific high-temperature testing and materials analysis instruments.