Compound Gage 2 : A pressure-measuring instrument on a fire apparatus capable of recording pressures both above and below atmospheric pressure. See also: Gage
Ralph W. Burklin & Robert G. Purington, Fire Terms: A Guide to Their Meaning and Use, National Protection Association, Boston, MA 1980 USA. (Guide: Meaning and Use, Nat Prot Association Fr Srvc - Amer) {457}