Superconductivity was discovered in 1911,when Kamerlingh Onnes found that the electric resistance of mercury dropped to zero at cryogenic temperatures. The so called transition temperature when a conductor becomes superconducting depends on the material used. For the next 75years, the transition temperatures were just in the 10 to 20 K range. In the present setup, the transition temperature of high temperature superconductor YBCO or BSCCO is measured. A probe chamber is used for liquid nitrogen in which the superconducting probe (sample) is cooled to below its critical temperature of approximately 93 K or -180 °C. The superconductivity probe is designed precisely based on four- point measurement for resistivity, the end points for fixed current and middle points for voltage drop. A temperature sensor is also attached on the surface of the sample. The voltage drop across the sample is measured as a function of the sample temperature using the voltage sensor.