Ceramic Thermocouple Sheath

Ceramic thermocouple sheath-often referred to as a ceramic protective sleeve-is a vital component that encases the temperature-sensing end of thermocouples, providing mechanical, chemical, and thermal isolation between the sensor and the measured medium. Constructed from high-performance materials like zirconia-toughened ceramics (with ZrO₂ content no less than 95%) or high-purity alumina, the product undergoes precise processing to achieve a flexural strength of ≥800 MPa (resisting breakage under stress) and resistance to thermal shock of over 600℃ (withstanding sudden heating and cooling cycles). These properties allow the ceramic thermocouple sheath to perform reliably in diverse harsh environments: high-temperature industrial furnaces, corrosive chemical reactors, abrasive powder-handling systems, and even complex atmospheres (oxidizing, reducing, or inert). In a 5000-ton/day new dry-process cement rotary kiln, for instance, the product protects K-type thermocouples from 1400℃ temperatures and abrasive alkaline ,achieving a dynamic response time of less than 3 seconds (ensuring real-time temperature monitoring) and extending the thermocouple's service life from a few months to over a year. When paired with armored thermocouple cores, the ceramic thermocouple sheath balances fast temperature response with long-term durability, making it a standard configuration in metallurgy, power plants, glass melting furnaces, and chemical processing facilities-ideal for industries prioritizing accuracy and low maintenance.