Wear-resistant thermocouple adopts modular structure, match with different materials and specifications resistant casing, has many characteristics, such as wear resistance, shock resistance, suitable for power plant ball mill and mill on protecting tube wear serious occasion. And in a variety of high degree of wear and tear of bad situations, the service life of the product is several times the ordinary products high, greatly improving the production efficiency, reduce the cost. Three kinds of material characteristics of thermocouple is wearable casing abrasion and high temperature alloy under high temperature environment, specially designed pure alloying by vacuum smelting, high temperature oxidation resistance and high temperature strength of special wear-resistant high temperature alloy, the forging overall drilling. Processing less defect and high reliability, high temperature strength wear-resisting comprehensive performance is good, price is higher, temperature 800 ~ 1200 ℃. Composite casting wear-resistant alloy using composite technology for high temperature alloy matrix to join the wear particles, precision casting molding. Without turning processing, casing high hardness, resistance to high temperature oxidation, but with a little casting defects do not affect high temperature wear resistance and impermeability, is to use common high temperature resistant casing, price moderate, temperature 800 ~ 1200 ℃. Ion permeability injection tungsten carbide substrate by ion permeability injection technology for stainless steel on the surface casing injection of tungsten carbide particles. Hard, high strength, high Gao Ren, special wear-resisting, wear-resisting layer thickness of 0. 5 ~ 1. 5 mm, rigid toughening, smaller diameter to phi 8, good surface quality, use temperature 0 ~ 800 ℃, the service life of the coal mill in power plant for more than 2 years.