Thermocouples

1. Principle of Thermocouples and Their Resistance Characteristics A thermocouple is a commonly used sensor in industrial temperature measurement. Its core principle is based on the Seebeck effect: two different metal wires (the thermoelectrodes) are connected to form a closed loop. When the two ends are at different temperatures, a thermoelectric potential (in millivolt levels) […]

1) Executive summary Probe wear on RTDs/thermocouples mainly comes from mechanical friction, particle erosion, installation errors, material/geometry mismatch, and vibration/corrosion at temperature. The cure is a mix of correct mounting, flow-aware placement, harder/armored materials, and disciplined inspection/replacement cycles. 2) Primary wear mechanisms (what goes wrong) Poor placement & fixing Tip touching vessel bottom/pipe wall; too

In industrial production, temperature sensors for monitoring furnace temperatures up to 1200 °C are critical for maintaining process stability and ensuring product quality. This article provides a detailed overview from four aspects: sensor types, working principles, key features, and application considerations. 1. Applicable Sensor Types For high-temperature measurement up to 1200 °C, the following types

1. Introduction Industrial thermocouples often operate in harsh environments characterized by high temperatures, dust-laden gases, corrosive atmospheres, and mechanical impact. Under such conditions, premature failure can occur due to wear, corrosion, or thermal shock. Shaped refractory bricks provide a physical barrier and environmental isolation for the thermocouple sheath and sensing junction. By tailoring the brick

1. Overview Brief introduction to tungsten-cobalt alloy (WC-Co) wear-resistant thermocouples, their typical applications, and why they are compared with ceramic, high-chromium cast iron, and bimetallic types. 2. Key Advantages 2.1 Superior Wear Resistance – Ideal for High-Hardness Particle Environments WC-Co hardness: HRC 65–90 (depending on cobalt content) 3–5 times the wear resistance of alumina ceramics

The measurement accuracy of a tungsten-cobalt alloy wear-resistant thermocouple is not determined by the tungsten-cobalt alloy sheath material itself. Instead, it depends on the thermocouple core type, overall structural design, and installation and operating conditions. 1. Key Factor: Thermocouple Core Type The tungsten-cobalt alloy acts as a protective sheath against abrasive wear and does not

Tungsten-cobalt alloy wear-resistant thermocouples are designed for extreme high-temperature and severe abrasive environments, where hard particles, high-velocity gases, or aggressive material flows cause rapid wear on conventional thermocouples. Their core advantage lies in combining excellent wear resistance with high thermal stability, ensuring accurate temperature measurement and extended service life. 1. Power & Energy Industry High-temperature

🔧 Overview The tungsten-cobalt alloy wear-resistant thermocouple is a specialized temperature sensing device designed for harsh conditions involving intensive abrasion, high temperatures, and particulate erosion. By using a WC-Co (tungsten carbide–cobalt) alloy as the protective sheath or sensing tip, it offers enhanced durability compared to traditional thermocouples. This document covers the structure, application scenarios, selection

From the scorching furnaces of steelmaking plants to the intricate reactors of chemical processing, and even the thermal protection systems of aerospace vehicles, accurate temperature measurement is vital. It directly influences product quality, operational safety, and technological innovation. As one of the most widely used temperature sensors in industry, the metrological performance of thermocouples plays

🔹 1. Low Temperature Range (−200°C to 0°C) • Electron Migration is Suppressed At cryogenic temperatures, atomic thermal motion weakens, reducing the ease of electron migration from the Nickel-Chromium leg to the Nickel-Silicon leg. This leads to lower thermoelectric EMF output and reduced sensitivity. • Increased Electrical Resistance As temperature decreases, the electrical resistance of