Ambient Weather WS-PF11 Wireless Pool and Spa Thermometer with Remote Sensor Finally, an easy way to read your water temperature from both indoors and outdoors. The WS-PF11 wireless pool and spa thermometer is water proof and floats on the surface of the water. The sensor displays and wirelessly transmits the water temperature to the display console. The three channel selectable switch allows you to monitor water temperature from three different locations. The screw-on lid design with internal gasket provides a leak free, water resistant design. The indoor console also displays indoor temperature, current date and time from the LCD display.