Pond Thermometer Easy to Read: Large visible window easily displays temperature readings in Fahrenheit and Celsius. Readings were as high as 120 degrees Fahrenheit and 50 degrees Celsius. Humanized Design Outdoor Water Thermometer: The swimming pool floating thermometer comes with a rope so it won't float away from the desired area. Accurate: Floating thermometer is used to measure water temperature in swimming pools and spas and provides accurate readings within minutes. HIGH QUALITY: Swimming pool floating thermometer is made of high-quality PVC material, the swimming pool thermometer float is durable, shatterproof and built to last. Widely Applicable: Outdoor cold water thermometer is suitable for all outdoor and indoor swimming pools, spas, hot tubs, aquariums and fish ponds.