The Terminator Actuator from Halogen Valve Systems can be used on chlorine ton containers as well 150-pound cylinders to instantly stop the flow of chlorine in case of an emergency. Emergency chlorine shut-off is initiated when the controller receives a close-contact signal from a leak detector or when the included emergency shut-off switch and a relay output provide remote indication that an emergency close sequence has been performed. 949/261-5030; www.halogenvalve.com