heatingandventilating.net - All the Latest Products >> The Series DM-1200 DigiMag Digital Differential Pressure and Air Flow Gauge is the ideal digital instrument to take the place of analogue mechanical pressure gauges used for pressure or airflow. The DigiMag Digital Gauges are more versatile than analogue gauges with their ability to be field-programmed to select pressure, air velocity or flow operations. The DigiMag Digital Differential Pressure Gauges have an added feature for filter applications where a set point can be input. When the filter is dirty, the display will blink alerting the user that the maintenance action needs to occur.