Such Type of Thermowells is used in highly abrasive environments such as Coal Based Power Plants and Air Preheaters etc. Solid Sintered Tungsten Carbide has got high resistivity to abrasions due to Coal particles, due to which such type of thermowell is highly preferred mostly in Coal Based applications.
Generally, the entire Insertion length comprises of Tungsten Carbide. But in cases where insertion length is very long only Bottom Tail Portion is provided with Tungsten Carbide, which would normally come in contact with the abrasive media.

Such Type of Thermowells is used in highly abrasive environments such as Coal Based Power Plants and Air Preheaters etc. Solid Sintered Tungsten Carbide has got high resistivity to abrasions due to Coal particles, due to which such type of thermowell is highly preferred mostly in Coal Based applications.
Generally, the entire Insertion length comprises of Tungsten Carbide. But in cases where insertion length is very long only Bottom Tail Portion is provided with Tungsten Carbide, which would normally come in contact with the abrasive media.