Density of LPG and of Light Hydrocarbons

ASTM D1657, IP 235, ISO 3993


ASTM D1657 - Density or Relative Density of Light Hydrocarbons

by Pressure Hydrometer.


This test method covers the determination of the density or relative density of light hydrocarbons including liquefied petroleum gases (LPG) having Reid vapour pressures exceeding 101.325 kPa (14.696 psi).


IP 235 - ISO 3993 - Density or Relative Density of LPG and of Light Hydrocarbons

by Pressure Hydrometer.

The prescribed apparatus shall not be used for materials having gauge vapour pressures higher than 1,4 MPa (absolute vapour pressure 1,5 MPa) at the test temperature.


Art. LT/HA-175000/M

Hydrometer Apparatus ASTM D1657


  • Tubular chamber made in acrylic resins ∅ 50 × 36 mm, L = 440 mm

  • Metallic headers coupled with six stainless steel tie rods

  • Neoprene gaskets

  • Three ¼” pin cocks

  • Mesh safety guard

  • Tested to 15 bar hydraulic pressure

  • Double scale manometer 0-2500 kPa, 0-350 Psi

  • Thermohydrometer ASTM 310H range 0.500-0.650, thermometer range -10..+35°C



LAB-639-710: thermohydrometer ASTM 101H 0.500-0.650

LT/TB-177500/M thermostatic bath 3 places:

Completely made in 18/8 stainless steel

Equipped with double bottom

Thermostating is digitally thermoregulated PID with overtemperature alarm and probe PT100A

Stainless steel heater working temperature up to 80°C

The bath is fitted with cooling coil and motor stirrer

Support which allows the immersion of 3 vapour pressure cylinders or 2 density pressure hydrometer

Atmospheric draining

Power supply: 220 Vac 50/60 Hz


Spare Parts

LAB-101-762: gasket pack of 10

LAB-101-763: polymethylmethacrylate tube

LAB-101-764: mesh safety guard

LAB-600-710: thermohydrometer ASTM 310H Range 0.500-0.650, thermometer -10 … +35°C


CE marked

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Density of LPG and of Light Hydrocarbons

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