RTD50CS RTD TEMPERATURE SENSOR FOR TEMPERATURE MEASUREMENT TO 400°F (204°C) INSTALLATION INSTRUCTIONS DESCRIPTION The RTD50CS is a 50-foot three-wire platinum RTD (resistance temperature detector) used with monitoring and control systems, such as our DigiTrace C910 or ACCS-30 controllers. The RTD50CS can be installed directly to the controller using the supplied 1/2-inch conduit fitting or to an RTD junction box where RTD extension wire is used.