Asea Brown Boveri LLC44A1A Sensor

ABB (Asea Brown Boveri) LLC44A1A is a single-probe liquid level controller designed for simple ON/OFF level sensing in tanks and other vessels. It uses a resistance-type sensor with a single probe and includes a built-in 1-second time delay to prevent rapid cycling as the liquid level changes. The unit operates on 120 V AC input and switches a connected load—such as a pump or valve—when the probe detects the target level, providing a straightforward, proven solution for maintaining a desired liquid height in process applications. Because it is a dedicated level-control device with a single sensing point, it is well suited for straightforward applications where multi-point sensing is not required, offering reliable, hands-off operation in industrial environments.