Dwyer Slack Tube U-Tube Manometer - Fluid Filled*Select from our ranges that are stocked in Australia* The SERIES 1211 Slack Tube Manometer is as accurate as the finest laboratory U Gauges, but is designed to roll up compactly for easy carrying. These manometers cover a wide range of pressure readings from 50 cmWG to 200 cmWG. Measure Positive, Negative or Differential Pressure Smallest Range: 0 50 cmWG; Largest Range: 0 200 cmWG Designed to be rolled up for compact storage supplied with