These hydrometers have been designed to meet the specific needs of users in the petroleum industry.

• Calibration temperature of 15 °C for a low surface tension (16 to 35 mN/m)
• Reading below meniscus
• High accuracy hydrometer with division of 0,0005 g/ml
• Mark engraved on the stem to show any displacement of the scale

The scale of the hydrometer is marked with the calibration temperature, the surface tension, the individual number of the instrument, the serial number.