Diesel Hydrometer 20c-800-850.

Calibrated temperature: 20°C (this means its scale is accurate when the diesel sample is at 20°C)

Range: 0.800–0.850 (specific gravity)

Glass hydrometer: typically a clear, durable, and chemically resistant glass tube.

Inside it has a paper scale, calibrated to show SG directly when floated in diesel.

Weighted at bottom to stay upright in the liquid.

Designed to measure the specific gravity of diesel and light petroleum products.

Allows you to determine density, API gravity, and grade of diesel.