When mounting the sensor, ensure that the face is pointed perfectly vertical at the water to minimize any echos that may disrupt the readings. This is paramount for accurate readings and should be checked if the unit or tank has encountered any movement for whatever reason.
Ice, dirt, mildew, cobwebs and other environmental material buildup can block the sensor face over time, which can prevent the ultrasonic soundwaves from being transmitted or received. Additionally, the ingress of contaminants, such as water, can affect sensor function.
Ideally, every 6 months, check and clean the face with alcohol or a mild cleaner, as water and condensation may cause this coating build-up on the level sensor. DO NOT use solvents such as acetone.
It is also best practice to check your sensor cable and ports at the same time for good connection, along with any kinks or broken wires that may have occurred.