SPECO Southern Parts and Engineering Company
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All of our Gauges are 100% OEM compatible and are formulated to achieve the best possible results in each application.

Most air compressors use sight gauges in some fashion. The most popular being oil level sight gauges that indicate the level of lubricant in the compressor reservoir or sump.
These can be of several designs. The most popular being the “bulls eye” sight gauge that is a large round glass set in a hex head fitting used to indicate sump level. Another design is the vertical tube type sight gauge that also indicates sump level by placing a transparent tube alongside the sump and indicating the level of the tube as it mirrors the sump.
Sight gauges are very often also used to observe oil return from the separator filter to the oil sump as the gauge is installed inline on the oil return line, indicating a positive oil flow through the return line.