Freon pressure gauges are offered in the size range of 63 mm to 100 mm size, with concentric temperature. These find wide use in the refrigeration filing equipment and air conditioning systems. Apart from this, the gauge also finds application in different refrigeration systems. These gauges are types of diaphragm chemical seals that have a capillary and are connected to measuring units via the capillary tubes. Freon pressure gauges are known for providing a hermetically sealed connection.