Marina Standing Thermometer - Celsius and Fahrenheit, designed to sink to the bottom of the aquarium and remain in a vertical position, Centigrade, Has a safety zone temperature range indicator for most tropical fi
Wall Thermometer, Wet and Dry Bulb, Graduated in Celsius -20 deg to +50 deg (1 deg C) and Fahrenheit 0 deg to +120 deg (2 deg F). Includes humidity table in C and F. Dimensions: 10in x 3in x 0.5in
Sling Psychrometer, to measure relative humidity, Includes two plastic-backed Celsius thermometers, one for dry bulb measurements and the other for wet bulb measurements, Includes an activity guide with relative humidity calculation table, Requires assembly
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