AH serie Mineral Oil Russian Hydrometer

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Russian Hydrometer AH serie Mineral Oil

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GOST traceable Hydrometers for the petroleum industry.
These hydrometers are registered by the Russian State: Certificate No. 33218.
The scale of the hydrometer is fully marked with all the reference norms, the calibration temperature, the surface tension, the individual number of the instrument.
With a benchmark engraved on the stem to show any displacement of the scale.
They are calibrated at 15°C or 20°C for a low surface tension (33 mN/m)
Reading below meniscus.