The Anton APM 135 Differential Manometer is a pressure meter optimised for conducting domestic pressure tests; it has a measurement range of -39.99 mbar to +130.0 mbar. The Anton APM 135 Differential Pressure Meter includes eight pressure measurement units allowing the user to tailor the manometer to his/her requirements. Pressure measurements are indicated on the Anton APM 135 Differential Manometer’s clear, backlit, LCD display. Pressure measurements between -39.99 mbar and +19.99 mbar are displayed to a resolution of 0.01, whereas pressure measurements above +19.99 have a resolution of 0.1. The Anton APM 135 Differential Manometer’s Max / Min recording function allows the operator to monitor pressure drops, whilst its simple push-button zero function ensures that multiple tests can be conducted efficiently and reliably. The Anton APM 135 Differential Manometer is robust and features standard push-fit spigot connections. It is also supplied with a standard rubber boot and three AA (1.5 V) alkaline batteries. The Anton APM 135 Differential Manometer is an easy-to-use, economical and efficient differential pressure meter. Its robust design makes it suitable for use in a variety of challenging environments.