https://www.geco-gering.de/en/products/baume-hydrometer-without-thermometer-6/
Baumé hydrometer without thermometer – Dichte Aräometer Baumé Saccharimeter Alkoholometer...
Standard temperature 15 °C Scale value 1 °Bé Total length +300 mm
hydrometerwithoutthermometerdichtesaccharimeter