Clean molding applications, especially in medical and pharmaceutical industries, require contamination-free production. Sealed thermocouples prevent the release of particles, resist plastic vapor penetration, and avoid internal degradation that could introduce contaminants into the molding environment.
Leading hot runner brands offer hygienic, fully sealed thermocouples with hermetic junctions, smooth sheaths, and high-temperature seals. Brands such as Hasco, DME, Watlow, and WIKA produce sensors designed to meet strict cleanliness standards. Type T and Type N thermocouples are often recommended for medical applications due to their high stability and low contamination risk. Advanced sealing technology prevents moisture, plastic residues, and volatile gases from entering the sensor structure.
Sealed thermocouple products include medical-grade probes, smooth stainless steel sheaths, and flush-mounted designs. These are essential for syringes, surgical tools, drug delivery devices, and food-contact components.
Common issues in unsealed sensors include internal contamination, particle release, drift, and short circuits. Unsealed designs can trap degraded plastic or release microscopic particles over time. Sealed thermocouples ensure compliance with regulatory standards and maintain the integrity of clean molding processes.
