A uretonimine-modified isocyanate composition having reduced color and a method of forming the same is disclosed. In a cluster, a conversation manager can be used to keep track of state location throughout the cluster. An output signal proportional to the height of a solution along the probe length is provided. In another embodiment, the wireless communication may be implemented by a transceiver broadcasting information to all of the modules. If the transponder is within the predetermined range, it will transmit and the wireless device will receive a response signal.