Custom TPE Thermoplastic Elastomer Thermistor Assemblies Solve Moisture Intrusion Problems

tpe thermistor probe

Designed with an over-molding process to ensure zero possibility of moisture intrusion in the probe assembly, Selco Products custom TPE thermistors are well suited in applications with overall operating temperature range of -40°C to 135°C.

Manufactured with robust, UL certified TPE material, these custom assemblies are ideal for harsh moisture environments. The TPE housing material is fused to the TPE lead wire insulation during the over-molding process which creates a moisture proof seal between the probe housing and the lead wire insulation. Depending on application requirements, these custom thermistor assemblies can have an accuracy as high as ±(0.2°C) over 0°C to 70°C or a tolerance of ±1.0% to ±10%. In specific applications such as NSF or medical, FDA approved TPE material can be supplied.

“Engineers that are looking at applications such as refrigeration and others, where the temperature sensor is exposed to moisture or high humidity, will benefit from this custom design,” says Mike Dobson, Selco Products Product Manager.  “These TPE over-molded thermistors will allow customers to select the right type of probe for their application to ensure that the thermistor is truly moisture proof,” he says.

These custom assemblies are produced with a probe housing diameter of 0.252 inches by 1.130 inches however, other dimensions can be provided as required by customer. They are supplied with 22AWG TPE insulated leads. The lead length can be specified by the customer and can come in grey, black, white and other colors if needed.  The leads can be supplied with connectors, lead stripping, or blunt cut as desired. These high-quality TPE over-molded thermistors are competitively priced and Selco can supply UL 1434 certified DO-35 discrete thermistors for the assembly as required.

Samples available now. Estimated initial lead time 10-12 weeks ARO for custom parts.

We are honored to serve as a manufacturer’s rep for Selco. Selco’s wide range of temperature control products serve a variety of industries including appliance, HVAC, medical, telecommunications, food service, and instrumentation. Products include thermostats, NTC thermistors, thermal cut-offs, thermal protectors, knobs, precision electronic controls, high-bright LED lighting, panel instruments, and photocells.