Accu-Safe Non-toxic Blue Liquid Filled Fractional Degree Partial Immersion Thermometer, 450 mm L, -1 to 101°C | SECO
TB-91C – Blue-Liquid ASTM Thermometer, 20 to 50°C in 0.1°C Increments (TB91C) – NC Labs Products
Water Thermometer for Water Temperature and Liquids, Laboratory Thermometer Range: -10 to +110 °C, 155 mm, Immersion Laboratory Glass Thermometer Filled with Blue Liquid : Amazon.de: Business, Industry & Science
Fisherbrand™ General Purpose Liquid-in-Glass Total Immersion Thermometers: Blue Organic Fill | Fisher Scientific
Thermostat with cold temperature indication. Blue liquid in thermometer Stock-Illustration | Adobe Stock