Model 9001.5 emergency alarm and light system features an amber flashing light and 90 dB at 10 ft (304.8 cm), buzzer that is operated by a 1/2 in NPT double pole, double throw flow switch. Unit is activated when the emergency eyewash is in operation. Switch will activate at 1.5 gpm (3.8 L). System can be mounted to pipe or wall. Unit is recommended to be installed where all eyewashes are installed in a remote or noisy location where user is unable to summon help.