SafetyBlue ThermoHydrometer 7.5/16.5 Plato & 0/50C Thermometer With NIST Traceable Certificate Go to amazon.com Related posts Top 15 best hydrometer beer thermometer: Which is the best one in 2022? DescriptionSafetyBlue ThermoHydrometer 7.5/16.5 Plato & 0/50C Thermometer With NIST Traceable Certificate