Plastic overmolding sensors, cables and connectors

The product in this video is a custom made overmolded humidity sensor, we developed for one of our customers. Our customer uses this sensor to measure temperature and humidity. Therefore, we use a high quality sensing component. Typically for such a product is that we reduce the development time because of the experience we have in-house. In this case, overmolding reduces the number of parts and as such it reduces the assembly time. In fact, such a product only needs one or two molding cycles, besides the preparation of the PCB and the cable, to get it ready.
Usually, we advise to do the overmolding in two steps. In the first step, we make the entire volume of plastic material. Because of the volume there will be shrinkage. The result is a surface which is not smooth at all, and sink marks will be visible. Therefore, we inject an extra finishing layer of plastic over the first layer. In this way, we ensure a nice quality finish of the custom made overmolded humidity sensor. Even the mounting flange is overmolded. As a result, it fits nicely ad tight around the probe.
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