Model 5101 bi-stable, flag-type liquid level indicator installs in a 2-inch NPT boss at the points of indication. The unit is non-electrical and positive for use in applications where leaks can develop at pressures or clear and opaque liquids do not warrant the use of glass-type sight windows. The large indicating flag is readable at 100 ft, and this model can be used to pressures up to 900 psi/g. The indicator is available in brass and SST or all SST.
Thomas Products Ltd., 987 West St., Southington, CT 06489, FAX (860) 621-1470.