Mechanical Structure Copper Bellows Sensor to Quick Respond to Temperature Changes

• Customization: Available
• Customized: Customized
• Brand: Thermal International
• Model NO.: BS-402
• Temperature Measurement Range: 30℃~320℃
• Temperature Control Accuracy: ±5℃
• Probe Material: Copper
• Capillary Length: Common 0.5~2 Meters
• Bellwall Material: Brass
• Working Pressure: Max. Internal Working Fluid Pressure Approx.1.5MPa
• Installation Method: Probe Directly Inserted or Threaded
• Transport Package: Carton Packaging
• Specification: Copper Bellows Sensor
• Trademark: Thermal International
• Origin: China
• HS Code: 73219000
• Production Capacity: 50000PCS/Week
• Package Size: 45.00cm * 40.00cm * 40.00cm
• Package Gross Weight: 15.000kg

Product Description

Product Description

Mechanical Structure Copper Bellows Sensor to Quick Respond to Temperature Changes

This is the power component (also called a temperature sensor) of a bellows-type thermostat, a core component for automatic temperature control in equipment such as gas valves and fryers.

Product Introduction:

It mainly consists of three parts: a copper temperature sensor, a capillary tube, and a bellows power element:

I. Copper Sensor: Directly inserted into or in contact with the measured medium (such as a gas flame or hot oil), it quickly absorbs heat.

II. Capillary Tube: Filled with a temperature-sensing working fluid (such as liquid propane), it connects the sensor to the bellows, transmitting pressure changes.

III. Bellows: Its internal pressure expands and contracts with temperature changes, directly driving the gas valve or switch.

Working Principle:

It works based on the physical principles of thermal expansion and contraction and pressure transmission:

I. The temperature sensor detects temperature changes, causing the internal working fluid to expand when heated or contract when cooled, generating a pressure change.

II. This pressure is transmitted through the capillary tube to the bellows, causing it to lengthen or shorten.

III. The mechanical displacement of the bellows directly links to the gas valve or switch, achieving regulation or on/off control of the gas flow, thereby stabilizing the equipment temperature.

Specification

Product Name	Bellows Temperature Sensor
Temperature measurement range	30℃ ~ 320℃ (suitable for high-temperature applications such as gas appliances and deep fryers)
Temperature control accuracy	±5℃
Probe material	Copper (good thermal conductivity, corrosion resistance)
Capillary length	Common 0.5~2 meters (customizable)
Bellwall material	Brass (high pressure resistant, fatigue resistant)
Working pressure	Maximum internal working fluid pressure approximately 1.5MPa
Installation method	Probe directly inserted or threaded; bellows assembly mounted on valve linkage mechanism.

Product Features &  Typical Applications: 

Features:

1) Purely Mechanical Structure: No power supply required; valves are directly driven by physical principles, ensuring high safety and suitability for flammable and explosive environments such as those involving gas.

2) Fast Response: The copper probe and capillary tube have high thermal conductivity, enabling rapid response to temperature changes.

3) Strong Environmental Adaptability: All-metal structure, vibration-resistant and corrosion-resistant, allowing for long-term stable operation in harsh environments such as those with oil fumes and high humidity.

4) Flexible Installation: The capillary tube can be freely bent to adapt to different equipment layouts.

Applications:

1) Gas Equipment: Temperature control and safety protection for gas water heaters, gas boilers, and gas stoves.

2) Commercial Kitchen Equipment: Constant temperature control for gas fryers, grills, and steamers.

3) Industrial Equipment: Temperature regulation for small oil/gas heating furnaces and drying equipment.

Product Pictures

Packaging & Shipping

Certifications

FAQ

FAQ

Q1 Are you trader? 
A1 We are factory.
 
Q2 What's your lead time for 5000pcs?
A2 We need around 20days after down payment received. .
 
Q3 You payment term?
A3 We accept LC, T/T 20% remittance +80% before delivery, DP.
 
Q4 Can we print our LOGO on heating element?
A4 Yes.
 
Q5 Do you offer guarantee? 
A5 Yes. We offer 1 year guarantee.