Cylinder head temperature (CHT) sensor  CHT PRO # 1100, CHT ASTRO & PRO+ # 1106 Installation Other CHT sensors Exhaust gas temperature (EGT) sensor  EGT ASTRO & PRO+ # 1203 Installation   Wheel speed (WS) sensor WS ASTRO & PRO+ # 1500 - 1502 Installation  Other Accessories Water temperature (WT) sensor  WT PRO # 1300, WT ASTRO & PRO+ # 1301 Installation    Other WT sensors Water temperature fittings # 1351    5/8" (17mm) # 1352    3/4" (19mm) # 1353    1" (26mm) # 1354    7/8" (22mm) Installation Infrared receiver (IR) IR PRO/FUN/ASTRO/PRO+ # 1631 Installation   Magnetic sensor (MS) MS PRO # 1600, MS ASTRO & PRO+ # 1616 Installation Other Magnetic Sensors Infrared beacon (IT) IT PRO/FUN/ASTRO/PRO+ # 1641 Installation   ALFANO STEERING WHEELS (SW) SW PRO # 7000-7033 Installation SW Accessories INFRARED DOWNLOAD PEN (IP) IP PRO # 6000, IP ASTRO # 6001 USB / Serial adapter # 6100 G-force (GF) sensor GF ASTRO # 1661 Cables Other Cables