Abstract: A device for remotely sensing and monitoring physical quantities with a low power ad hoc network is used for monitoring and remotely transmitting environment parameters of a locale where the device is located. The device includes a physical quantity acquisition and processing unit, a Z-Wave core unit, an audible and visual alarm unit, a direct-current (DC) power supply, a memory unit, a programmer port, and a radio frequency (RF) antenna and matching circuit. The Z-Wave core unit is bidirectionally connected to the physical quantity acquisition and processing unit, the RF antenna and matching circuit, the memory unit, and the programmer port through general input output (I/O) ports. An output terminal of the Z-Wave core unit is connected to an input terminal of the audible and visual alarm unit. The DC power supply provides stability power with suitable voltage to the Z-Wave core unit.