Certified to ASTM E-1 specifications

HYDROMETER CENTERING DEVICE

All thermohydrometers feature divisions every 2 degrees Fahrenheit.

Please note if you need item calibrated here is an extra cost, you can make your request known in the order comment box.

Divisions every 0.5 degrees Fahrenheit.

For metric density, ASTM 321H covers the range from 775 to 825 kg/m³, avoiding the need
to purchase two hydrometers, ASTM 314H & 315H. Likewise, for a Thermohydrometer,
ASTM 345H handles the range from 775 to 825 kg/m³ but its thermometer is graduated
in 0.2°C increments. Unfortunately, the temperature range had to be limited to -10 to
+40°C.

These hydrometers and thermometers have been shortened to fit in Aljac JM-3001 samplers when the lid is closed.

Model GTP-1695-1 covers jet fuel and Avgas. GTP-1697-2 covers only jet fuel. No thermometers are included. Graduated to 0.01, 320mm length.

THERMOHYDROMETER,  NON-MERCURY, ASTM S557 HL, 59-71 API (Replaces GTP-1682B)

Thermometer holder with cup and lid, equipped with metal backing to dissipate static charges through wire cable. Cable not supplied; order separately, specifying length. Lid of cup is hinged to open as it is lowered into fuel.

NIST calibrated reference hydrometers at the required test points (as specified by ASTM or the customer). At least three readings of the clients instrument (and at least six readings of the NIST reference standard) are taken at each test point. Readings are resolved under magnification to approximately one-tenth of the smallest scale division and are carefully noted. We report the mean of a minimum of three closely correlated readings