Description

The CT-334 explosion-proof temperature sensor features an XDA explosion-proof terminal box design, complying with safety regulations for explosive gas or dust environments. Sensing elements include K-type and J-type thermocouples and PT100 platinum resistors. The accuracy class standard is Class 2 for K/J, while PT100 is available in Class A or B. The temperature measurement range is from −200 °C to +1000 °C, covering temperature requirements in various extreme environments. The protective sleeve diameter is available in φ15 or φ20 mm, with standard tube lengths of 300 mm, 500 mm, and 800 mm. Materials include SUS304, SUS316, and INCONEL600, suitable for corrosive or high-heat-resistance applications. The overall design balances explosion-proof performance with temperature measurement accuracy, making it an ideal choice for applications with high safety and performance 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

• Φ17
  For other specifications or customized options, please contact us to discuss.

Flange Specifications

• For other sizes or custom options, please contact us to discuss the 1″ 150 LB RF flange.

Installation

• Featuring a large round-head terminal box design, it provides robust connections and an easy-to-maintain interface.

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 explosion-proof pipelines and storage tanks in petrochemical and natural gas facilities.
• Equipment monitoring of flammable gas environments in chemical and pharmaceutical plants.
• Environments containing dust or flammable gases in warehouses or factories.
• The equipment requires frequent cleaning, but its explosion-proof and sealing performance must be ensured during application.
• Reliable temperature measurement in high-temperature or corrosive fluids or air gaps.

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