Liquid-Filled Vacuum and Compound Gauges

Our selection of oil-filled vacuum and compound gauges is designed to accurately measure vacuum (negative pressure) in inches of mercury. Our oil-filled vacuum gauges cover a range from -30 inHG to 0, 15, 30, 60, or 160 PSI. Additionally, we offer compound gauges, also known as "boost" gauges. Available in dial sizes ranging from 1 ½” to 4”, these gauges can be mounted at the center back or lower (bottom) positions and are filled with glycerin oil for optimal performance. To place an order, simply click on your preferred mount type and dial size, then select the desired pressure range from the provided options. Vacuum gauges are identified by a part number followed by a dash and a “V” designation, while compound gauges include a positive pressure range indicated after the "V" suffix. For example, "PB204L-V00" denotes a 2” vacuum gauge, glycerin-filled, with a lower mount and ¼” NPT connection, measuring from -30 inHG to 0 PSI. Products ending with "V15" represent a pressure range of -30 inHG to 15 PSI.