CT-328 Low-Temperature Thermometer

Precision temperature sensor designed specifically for freezing and low-temperature environments.

The CT-328 is a temperature sensor specifically designed for cryogenic applications. It utilizes a cryogenic sensing element and a stainless steel protective sheath, and features mounting holes for easy installation in freezing tanks, refrigerator systems, and laboratory equipment. Its robust construction and high adaptability make it an ideal solution for cold chain and materials cryogenic monitoring.

Description

The CT-328 low-temperature temperature sensor typically uses a T-type thermocouple or a PT100 RTD sensing element. The protective sleeve is made of SUS304 or SUS316 stainless steel, which has excellent corrosion resistance and low-temperature resistance; coupled with the mounting hole design, it ensures that it can be firmly installed in refrigeration equipment or pipelines, unaffected by vibration or low-temperature environments.

This product is widely used in cold chain logistics monitoring, laboratory ultra-low temperature equipment, food preservation systems, semiconductor cooling processes, etc. It can operate stably in low-temperature environments, accurately respond to changes, and enhance process safety and quality control.

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)

Installation

The terminal box features a cryogenic head design for waterproof sealing.

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 monitoring of cold chain storage and transportation equipment (such as refrigerated trucks and frozen warehouses).
Laboratory cryopreservation systems (such as liquid nitrogen containers and cryogenic devices).
Temperature control of food processing and preservation facilities.
Monitoring of cooling units in semiconductor manufacturing processes.
Industrial Low Temperature Testing and Quality Control Points.