A coin-sized thermometer, designed by Xiamen Linktop Company, can transmit real-time temperature data to mobile phones using cloud computing. [Photo / xmnn.cn]

A wearable thermometer has recently been put into trial operation in two hospitals in Xiamen, Fujian province.

The coin-sized thermometer has a diameter of 3.8 centimeters and thickness of 0.8 centimeter. It is attached under the armpit and can transmit the temperature data onto a mobile phone within one minute using cloud technology .

The thermometer is made of graphene . Its producer, Xiamen Linktop Company, says it will apply for a patent .

The new thermometer surpasses traditional mercury ones, which can lead to potential mercury contamination.

The cloud computing app realizes real-time monitoring on the mobile phones and will be particularly beneficial to children and elderly patients.