Investigate the thermal characteristics of three electrical thermometry devices and also explore the features and behavior of a closed loop digital temperature control system. The Thermoelectric Effects Apparatus consists of an oven containing a cooling fan, a massive metal block and electric heater supported on two thin struts, the three samples and the control system sensor. A control unit provides the heating current and houses the digital temperature controller. The oven and the control unit are connected by three multi-pole cables.