Onset’s HOBO MX1101 data logger measures and transmits temperature and humidity data wirelessly to mobile devices via Bluetooth Smart technology. The data logger works with Onset’s free HOBOmobile app for logger setup and data management, enabling the user to access data over a 100-foot range, at any time, from an iOS mobile device. Unlike USB loggers, which need to be set up and offloaded while connected to a computer, this data logger communicates instantly and requires no dedicated equipment beyond an iOS device to configure the logger or read out data. Building monitoring applications include tracking storage temperatures in a food warehouse, keeping tabs on humidity levels, or investigating comfort complaints. If temperatures in a data center climb to a point where equipment overheating may occur, or if building humidity conditions reach a point that could lead to mold growth, the logger will beep and display alarm notifications so users can take corrective action.