Fluid-pressure detector

Abstract From the Canadian patent

A fluid-pressure detector comprising a pillowlike body capable of expanding and shrinking depending on pressure of fluid flowing in the pillow-like body a, detecting means for detecting an amount of expansion or shrinkage of the pillow-like body, and a connecting means for detachably connecting a detecting portion of the detecting means to an outer surface of the pillow-like body. Fluid pressure can be detected continuously and accurately both in the case of positive pressure and in the case of negative pressure. The detecting means is detachable from the pillow-like body, so that only the pillow-like body can be discarded while leaving the expensive detecting means as it is.