The digital pond thermometer features a high precision temperature sensor that ensures accurate temperature readings and offers a flexible temperature reading range of 0°C to 50°C. Solar pool thermometers are ideal for home swimming pools, hot tubs, pool spas, hot tubs, aquariums and fish ponds Pool thermometers are primarily made of safe, strong and durable plastic with long life. The spa thermometer comes with a handy chain for easy pick up and hold or attachment to a pole