Description

The CT-321 features a round-head terminal box design for convenient installation and wiring, allowing for easy integration into equipment or system interfaces. Standard products include a variety of sensing elements, probe lengths, and sleeve materials, while other specifications can be customized upon request.

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)

Threaded Threads

• Standard interface: 1/2″ PT.
  For non-standard specifications (such as different temperature sensing elements, accuracy, tube length, materials, etc.), please contact us directly to discuss customized solutions.

Installation

• The small round-head terminal box features a fixed design for easy connection and maintenance.

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

• Pipeline temperature measurement and monitoring.
• Embedded temperature detection in mold.
• Temperature measurement inside control box and equipment housing.
• Automated process temperature control applications.
• Point temperature monitoring of heating or cooling systems.

Further Reading

• Sensing accuracy and error calculation method

  Resistance thermometer accuracy table and calculation formula

• Thermocouple accuracy and power meter

  Thermocouple accuracy and electric current

• Product Classification by Appearance

  Terminal box type temperature sensing rod introduction

  Introduction to wire-type temperature sensing rods

• Temperature calibration laboratory information

  CPT Temperature Calibration Center

Contact Information

For quotes, product selection advice, or technical assistance, please contact us through the following methods:

• Tel：07-3531378
• LINE@：@oneway3281
• Email：sales@oneway.com.tw