High Temperature Thermometers

High Temperature Thermometers

High temperature thermometers are specialized TC-based temperature assemblies engineered for extreme thermal environments where conventional industrial sensors and materials cannot provide adequate life or stability. In services such as steel treatment, glass melting, flue-gas systems, and brick/ceramics processes, temperatures can approach very high levels (up to around 2000 °C), demanding purpose-built protection systems and sensor constructions.

At these temperatures, protection of the sensing element becomes a dominant design driver. Thermowells and protection tubes manufactured from ceramics or special alloys are used to shield the sensor from mechanical loads, chemical attack, and rapid temperature shocks. By isolating the measuring insert from direct process aggression, the protection tube improves survivability and extends sensor service life under harsh cycling and particulate exposure.

Sensor selection typically spans both base-metal and noble-metal thermocouples, depending on required temperature range and stability (e.g., types J/K/N as well as noble-metal types such as B/S/R). Modular construction supports configuration to the application with optional temperature transmitter placement either integrated or remotely mounted. Mechanical interfaces can be tailored through threaded, compression-fitted, and flanged process connections to match furnace, duct, or reactor hardware.

Use cases concentrate around high-heat generation and heat-treatment operations where temperature is tightly linked to product quality, energy efficiency, and equipment protection. Typical applications include energy production (biomass or coal), chemical gasifiers, industrial furnaces (including waste incineration), glass industry furnaces, steel and iron production, and cement/building-material processes.

Practical selection focuses on matching thermocouple type, protection-tube material, immersion length, and connection style to thermal gradients, atmosphere chemistry, abrasion, and mechanical vibration. A modular portfolio supports adapting the same measurement concept across multiple high-temperature assets while maintaining consistency in installation and documentation.

Forberg Smith, an exclusive authorized representative of sales and service for Endress+Hauser.