Capillary thermostats use a liquid-filled sensing bulb and capillary tube to monitor and control temperature. When the temperature changes, the liquid expands or contracts, moving a diaphragm that operates an electrical switch. This simple yet precise mechanical system provides reliable and repeatable temperature control without electronics.
✔ High reliability and long operating life
✔ Compact mechanical design with no electronic components
✔ Wide temperature range capability
✔ Small ON/OFF differential for accurate control
✔ Available in multiple configurations and ranges
The Type E capillary thermostat is a high-quality mechanical temperature controller designed for precision control in household and industrial heating applications such as ovens, fryers, and boilers.
| Parameter | Specification |
| Temperature Range | 30 °C to +320 °C (subranges available: 0–50, 30–110, 50–320 °C, etc.) |
| Contact Rating | 16(3) A – 250 V AC |
| Capillary Length | 300 mm – 3000 mm (customizable) |
| Capillary Material | Copper / Stainless Steel |
| Bulb Diameter | 3 mm / 4 mm / 5 mm / 6 mm |
| Mounting Holes | 2 × M4, 28 mm center distance |
| Minimum Bend Radius | 5 mm |
| Terminal Material | Brass |
| Operating Life | ≥ 100,000 cycles |
| Insulation Resistance | ≥ 100 MΩ |
| Dielectric Strength | 2000 V AC / 1 min |
| Contact Resistance | ≤ 50 mΩ |
| Temperature Response Rate | ≤ 1.0 °C / min |
| Switch Type | SPST / SPDT |
| Certifications | CE |
✔ Ovens and fryers
✔ Boilers and heaters
✔ Industrial heating systems
✔ Temperature safety control devices
| Model | Description | Typical Range (°C) | Contact Rating | Applications |
| Type F | Heavy-duty capillary thermostat with reinforced contacts and extended life. | 0 – 350 °C | 30 A / 250 V AC | Industrial ovens, furnaces |
| Type Y | High-precision thermostat with narrow differential for accurate control. | 0 – 250 °C | 16 A / 250 V AC | HVAC, food equipment |
| Type Th | Thermostat with integrated thermal fuse for safety shutoff. | 0 – 320 °C | 16 A / 250 V AC | Water heaters, safety-critical devices |
✔ Water heaters and boilers
✔ Ovens and food processing equipment
✔ Refrigeration and HVAC systems
✔ Industrial heating and control panels
✔ Steam systems and temperature-limited enclosures
© IMPEX TRADING COMPANY. All Rights Reserved.
Impex Trading