| 摘要 |
A pressure-sensitive switch assembly for measuring the pressure of material and having a measuring head which is in direct contact with the material to be measured. The head includes a flexible diaphragm to which is attached a rod that engages an electric contact switch. The assembly is an integral and self-contained, sealed unit which can be readily mounted on a supporting wall with the head on the interior of the vessel containing the material to be measured. The invention finds particular utility when used in a continuous freezer for measuring the pressure within the cylinder and then stopping the operation of the pump which pumps material into the cylinder, when a predetermined pressure is reached, thus the pump is turned off and no longer pumps material into the cylinder.
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