The Micro IV single-gas detector comes with memory and an infrared interface besides a data logger. The device is an advanced version of the Micro III. Many of the Micro III features such as smart, interchangeable sensor technology and low cost of purchase where the 1 x AA battery lasts for 6 months, were all retained. The integrated data logger is able to record and then time-stamp all events. The data can be transferred to a PC using the DI220 data interface station or DS220 docking station. The Micro IV single-gas detector features three alarm levels apart from the TWA and STEL alarms. It offers highly visible red LED alarms and a loud sounder. It may also be outfitted with vibrating alarms, if required. The gas concentration readings may be easily read by the users with its large display.