Priamus develops hardened sensor front for cavity pressure and temperature sensors

In many cases, however, this is precisely the problem because abrasive, highly filled and chemically corrosive plastic melts gradually damage the sensor front. The lifetime of the sensors is therefore limited with such applications. As such, Priamus has developed a new and patent filed procedure in order to manufacture the sensor front from an extreme hard and chemically resistant material, which the company says extends the lifetime significantly. Alternative methods such as thin layers of Titanium Nitride or chromed surfaces are not as effective because it cannot withstand the wear; the surfaces were washed away; or because the outline of the sensor front could not exactly be mapped. The consequence was a visible mark on the molded part, the company stated.

Cavity temperature sensors with hardened sensor front are  being used in these highly abrasive conditions. These applications have proved that even under such extreme conditions a significantly longer lifetime can be achieved. Cavity pressure sensors are now also available with hardened sensor front and allow the reliable use with highly filled materials or with ceramic melts.