Ajax Scientific Dual Scale Thermometer with Metal Back, -30 to -110 Degree C Temperature Range, for Indoor/Outdoor : Amazon.ca: Industrial & Scientific
Sargent-Welch Scientific Co Thermometer -20 to 110 Celcius Yellow Back 80006 10B | eBay
Sargent-Welch Scientific Co Thermometer -20 to 110 Celcius Yellow Back 80006 10B | eBay
Ajax Scientific TH015-0050 Dual Scale Thermometer with Plastic Back, -40 to 50 Degree C Temperature Range, for Indoor/Outdoor : Amazon.ca: Industrial & Scientific