Product description The APR series of stress thin film gauges measuring from 1 hPa to 55,000 hPa, the robust design of the gauges for harsh industrial environments, and the stress film gauges APR series are corrosion resistant and can measure a wide range of gases or gas mixtures. Models include stress film gauge APR 250/APR 260/ APR 262/APR 265/ APR 266/ APR 267, which can assist customers in selection and provide perfect after-sales service