Abstract: The invention discloses a temperature variation apparatus for varying the temperature of a liquid. The temperature variation apparatus includes a metal tube, a power supply, a heat conductor, and a thermo-electric cooler (TEC). The liquid is poured into the metal tube. The power supply has an anode and a cathode respectively connected to two ends of the metal tube, so that the metal tube can be electrified to generate heat. The heat conductor encircles and contacts with the metal tube, and the thermo-electric cooler contacts with the heat conductor.

Abstract: A blood pressure monitor for measuring a blood pressure of a human body includes a main body, a connecting mechanism, and a sensing unit. The main body surrounds the human body and has a first end portion and a second end portion. The connecting mechanism connects the first end portion with the second end portion at a first position or a second position. When the first end portion and the second end portion are connected at the first position, the human body surrounded thereby has a first circumference, and when the first end portion and the second end portion are connected at the second position, the human body surrounded thereby has a second circumference. The sensing unit, disposed on the body, detects the first position or the second position to determine the first circumference or the second circumference respectively.

Abstract: The invention discloses a temperature variation apparatus for varying the temperature of a liquid. The temperature variation apparatus includes a metal tube, a power supply, a heat conductor, and a thermo-electric cooler (TEC). The liquid is poured into the metal tube. The power supply has an anode and a cathode respectively connected to two ends of the metal tube, so that the metal tube can be electrified to generate heat. The heat conductor encircles and contacts with the metal tube, and the thermo-electric cooler contacts with the heat conductor.