PVF Sensor is basically photo sensor which is used for determining vacuum force or pressure of gas or fluid stored in oil tank, fuel tank and in refrigeration systems. This pressure and vacuum force based sensor is fitted inside pipeline of any storage system for detecting any change in vacuum level or in pressure level of that system. PVF Sensor is also capable of detecting leakage in the pipeline of specific system. Its diaphragm is used to establish connection with vacuum or pressure source and pressure transducer. This transducer plays significant role in converting vacuum force or pressure into electric signal which is sent to a specific control system for displaying of measured value.