Capillary Oven Temperature Controller
Product Details
Jaye Heater Technology Co., Ltd. is one of the most reliable manufacturers and suppliers of capillary oven temperature controller in China, also supports custom service. Welcome to wholesale high quality capillary oven temperature controller at competitive price from our factory.
Products Core Structure
- Temperature sensor (capillary): A long, thin metal tube filled with a temperature-sensitive liquid (such as a paraffin mixture or a special gas).
- Diaphragm/Bellwall: Connected to the capillary, it deforms under the pressure of the expanding liquid.
- Switching mechanism: Converts the deformation into mechanical action, switching the circuit on or off.
- Adjustment knob: Used to set the target temperature.
Products Working principle
When the probe detects a temperature change, the liquid inside the tube expands or contracts, the pressure is transmitted to the diaphragm, the diaphragm deforms and drives the mechanical mechanism, triggering the switch to open or close, thereby controlling the operation of the heater/cooling equipment.
Products Advantages
Precise and Stable
- Utilizes liquid pressure transmission for high response sensitivity (accuracy up to ±1°C)
- Impact-resistant to electronic interference, suitable for complex electromagnetic environments
Highly Durable
- All-mechanical structure, no semiconductor components, lifespan exceeding 100,000 cycles
- Resistant to high temperature and humidity environments (some models can withstand temperatures above 150°C)
Widely Adaptable
- Probe can be remotely installed (capillary length up to 3 meters)
- Suitable for temperature measurement of various media including liquids, solid surfaces, and air
Safe and Reliable
- Intrinsically safe design for high-voltage or flammable environments
- Fail-safe versions available for critical applications
Basic Product Parameters
| Item description | Factory Customized Temperature Protector |
| Rated Voltage & Current | Standard at 16A/250V. Can be customized. |
| Temperature range | 0-320 degrees |
| Probe diameter | 6mm |
| Probe length | According to the temperature |
| Max.application ambient temperature | T150 |
| Length of Capillary Tube | 200-2000mm |
| On-off temp. difference | 2-12 degrees |
| Electric strength | 2000VAC/1 min/0.5mA |
| Insulation resistance | ≥100MΩ |
| Contact resistance | ≤50mΩ |
Product Pictures



Product Q&A
Q1: What are the main disadvantages of capillary thermostats compared to electronic thermostats?
A: They cannot achieve digital programming and remote communication, and typically only have single-point temperature control functionality, with slightly lower accuracy than high-end electronic models.
Q2: What precautions should be taken during installation?
A:The capillary tube should be kept from sharp bends (minimum bending radius is usually >20mm).
The probe should be in full contact with the object being measured; thermal grease is recommended.
Keep away from vibration sources or areas subject to mechanical impact.
Q3: How to choose the appropriate length and response temperature model?
A: Select the capillary tube length based on the actual installation distance (allowing a 10% margin), and select the corresponding model based on the device's operating temperature range (Jaye-heater typically offers multiple ranges from -30°C to 300°C).
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