Fireboy Marine Propane Detectors & System Products Code NameImagePrice FBYC-1PROPANE/CNG CONTROLW/SOLENOID VALVE $139.99 FBYS-12" PROPANE DETECTOR $158.99 FBYS-1A2" PROPANE DETECTOR (SQ) $214.99 FBYS-2A2 CHANNEL PROPANE/ CNGMONITOR CONTROL $266.99