10 feet (3 meters) is the maximum length of our sensor cables. You can extend the cable using a good quality alarm cable. Remember that a longer cable raises the probability of a high voltage drop and wrong measurements. If you use it only to check the temperature and do not use it as a thermostat, then some deviation in measurements would probably not be a problem. It is very important to use quality cable and connectors, however. We check the manufacturing of our temperature sensors to ensure high standards for all their components. Despite the apparent simplicity of this component, it is the product of a series of important factors.