McDonnell & Miller model number RS-3-BR-1 is a remote sensor for 3 level (1" IPM) and use with 750 series LPC-2000 or PCH and PCL liquid level control and low water cut-off control units. This remote sensor has a maximum water temperature of 406°F, water pressure of 250 psi, and steam pressure of 250 psi. "P" series probes must be ordered separately by length.