A capillary thermostat is a mechanical temperature controller based on the principle of liquid expansion, primarily used for accurately sensing and controlling the temperature of equipment or media.
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.
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.
| 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 |



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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