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Help CenterIndustrial Capillary Oil Level Temperature Gauge Thermometer Pressure Temperature Measurement Stainless Steel
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1.Product Overview
The pressure thermometer (KY-PGT) is a mechanical instrument that measures temperature by utilizing the thermal expansion principle of a sealed thermometric system. It features a robust construction, clear indication, and requires no external power source, making it particularly suitable for on-site temperature monitoring and as a temperature feedback component in automated control systems. With its all-stainless steel sensing components and reliable mechanical design, this product delivers outstanding stability and long service life in environments with neutral corrosive media.
2.Working Principle
The instrument operates based on the physical principle of thermal expansion and contraction. Changes in temperature cause the volume of the filling medium (liquid or gas) inside the temperature bulb to vary. This pressure change is transmitted through the capillary tube to the Bourdon tube, which undergoes corresponding elastic deformation. This movement drives the linkage and gear mechanism, ultimately causing the pointer to accurately indicate the measured temperature on the dial.
3.Core Structure & Materials
| Component | Material | Description |
|---|---|---|
| Temperature Bulb | Stainless Steel ( 304/316SS) | The core sensing element that directly contacts the measured medium to detect temperature changes. |
| Capillary Tube | Stainless steel sheath, internal filling | A sealed connecting tube that transmits pressure changes. Standard lengths are optional (1-10m). |
| Bourdon Tube | Phosphor Bronze or Stainless Steel | Converts the pressure signal into angular displacement of the pointer. |
| Case & Dial | Die-cast aluminum / Stainless Steel | Protective housing with a clear, easy-to-read dial. Dual scales (℃/℉) can be customized. |
4.Main Technical Parameters
Measurement Range: -40℃ ~ +300℃ (multiple range segments optional)
Accuracy Class: Class 1.5
Bulb Dimensions: Standard diameter φ8/φ14mm, length customizable
Capillary Length: Standard 1m, 2m, 5m, 10m, customizable as needed
Capillary meterial :Copper ,Plastic-coated ,stainless steel
Case Diameter: Commonly 4”(φ100mm), 6"(φ150mm)
Mounting Style: Radial, axial, or universal mounting
Bulb Connection: Standard threads such as M10×1, M12×1.5, G1/2", or flange connection
Protection Rating: IP65
Oil filled optional
5.Typical Application Fields
This product is widely used in industries requiring on-site monitoring and control of process temperatures:
Machinery Industry: Hydraulic systems, oil cooling systems, heating equipment.
Chemical & Pharmaceutical: Temperature monitoring for reactors, pipelines, storage tanks (media compatibility must be verified).
Food & Beverage: Pasteurization lines, fermentation tanks, storage vessels.
Textile & Light Industry: Drying equipment, heat-setting machines, HVAC systems.
HVAC (Heating, Ventilation & Air Conditioning): Central air conditioning chilled/hot water systems.
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