The Butterfly Valve Oil Thief has quickly become the preferred choice for many thieving applications. The quarter-turn concentric valve opening/closing assembly is located within the barrel making the unit more compact and allows the thief to pass through openings as small as 5 inches in diameter. The thief allows for a quick release of samples through the bottom end of the barrel. The rotating valve disk includes a replaceable rubber “O” ring that ensures a tight seal and prevents leaking. Each thief has four legs in the bottom casting which make the thief a stable hydrometer cylinder. The top casting includes a hanger for hanging the thief on a tank hatch or equipment case. Thieves offer a single trip action, simple closure tension adjustment, and adjustable trip rod graduated at standard extension intervals. Barrels are constructed from clear plastic, brass, or aluminum, and are available in 12-inch, 16-inch, and 18-inch lengths. Drain valves are sold separately and can be installed at most heights on the barrel.
This grouping of hydrometers are not ASTM – but are enormously popular in the same applications as the ASTM 21 through 39H hydrometers. All are 165mm in length, graduated in 0.2 API divisions, and made to the same demanding tolerances as ASTM hydrometers. Each hydrometer can be ordered with or without NIST Traceable Report of Test by adding or removing the "C" to the catalog number.
Approximately 190mm (7-1/2″) Length. Thermometer in body. Not ASTM designated, but made to similar specifications. Popular due to the smaller sample amount (approx. 6 ounces) ounces needed to obtain a reading. Made to the same demanding tolerances as ASTM hydrometers. Accuracy: +/- 1 scale division. Each hydrometer can be ordered with or without NIST Traceable Report of Test by adding or removing the "C" to the catalog number.
Eight hydrometers 500-231 thru 500-238 below, covering the range from .700 to 2.000 A thermometer range 0/230 °F is included. Supplied in a sturdy foam cushioned case with carrying handle. Each hydrometer can be ordered with or without NIST Traceable Report of Test by adding or removing the "C" to the catalog number.
.070° Specific Gravity ranges, 6″ length. Made to the same exacting standards as ASTM hydrometers, these units have found wide application due to their slightly longer, overlapping ranges. Accuracy to +/- .001 Specific Gravity. Each hydrometer can be ordered with or without NIST Traceable Report of Test by adding or removing the "C" to the catalog number.
.070° Specific Gravity ranges, 13″ length. Made to the same exacting standards as ASTM hydrometers, these units have found wide application due to their slightly longer, overlapping ranges. Accuracy to +/- .0005 Specific Gravity. Each hydrometer can be ordered with or without NIST Traceable Report of Test by adding or removing the "C" to the catalog number.