Hydrometers listings in countries Hydrometers in Germany (34) Hydrometers in Poland (9) Hydrometers in Austria (4) Hydrometers in Switzerland (3) Hydrometers in Hungary (3) Hydrometers in United Kingdom (2) Hydrometers in France (2) Hydrometers in Bulgaria (1) Hydrometers in Czech Rep. (1) Hydrometers in Spain (1) Hydrometers in China (1) Hydrometers in Turkey (1) Hydrometers in Luxembourg (1)