Ashcroft^® 1133 Series Differential Pressure Gauges use a convoluted diaphragm to sense low inches of water differentials while ensuring no migration of the process media. The 1133 series offers maximum static pressure capability of 500 psi and ranges from 1IWD to 25IWD.  Body materials are available in Aluminum or Stainless Steel. The 1132 series comes in 3.5", 4.0", 4.5", and 6.0" dials and is offered in dry or liquid (glycerin) filled. Common uses for the Ashcroft 1133 series include filtration monitoring, flow measurement, liquid level indication, and leak detection.