Altop industries offers a wide range of pressure calibration products. These are developed keeping in mind modern industry requirements. As part of these products, the company offers 30 series wide range pressure calibrators. They are capable to conduct all the jobs of a toolbox of pressure gauges and modules. They can measure vacuum to 3000 psi with one pocket sized pressure calibrator. These are pocket sized. Manufactured from unbreakable aluminum, these are strong and durable. They can measure pressure from inches of water to 3000 psi and vacuum, in a single shirt pocket size package. These are available in various models to suit different applications. These are well tested in an environmental chamber. It is provided with a single alkaline 9v battery, which ensures 90 hours of continuous operation.