These Slack Tube Manometers are as accurate as the finest laboratory “U” Gauges, yet they are made to roll up compactly for easy carrying and to withstand rough usage.Simply unroll the Slack Tube Manometer and set up to read static pressure, vacuum, or differential pressure. Magnetic clips hold it firmly to any steel surface or hang it on a nail. Turn connectors one revolution to open. When the pressure is imposed, add the number of inches one column travels up to the number of inches the other column travels down. When reading is completed, turn connectors to seal columns, roll up manometer into compact coil and tuck it away in its circular metal case or tool box. No fluid loss. No loose caps or inserts to lose.
Slack Tube Manometers cover a wide range of pressure readings from 4 to 0 to 4" up to 60 to 0 to 60". Use them in determining velocity in static pressures, for leakage, fan and blower tests, calibrating control devices, checking gas pressure and many other applications.