The PT-Demo PID controller from Omega features a fully integrated temperature control system suitable as a platform to investigate the use of closed-loop (PID) and single on/off temperature control in heating and cooling applications. Features include intuitive menu flow, panel-mounted USB and Ethernet connectivity, alarm indicator, 4-20mA remote setpoint potentiometer, push-button digital input and aluminum plate, enabling the user to feel temperature responses. 800/826-5342; www.omega.com.