Handheld low-power-consumption temperature and humidity detector

The invention discloses a handheld low-power-consumption temperature and humidity detector which comprises a power supply unit and a main circuit unit. The power supply unit comprises a battery, an on-off detection circuit, a switching circuit and a power conversion circuit, and the battery, the on-off detection circuit and the switching circuit are connected in sequence; the main circuit unit comprises a microprocessor, a sensor interface circuit, a key module and the display module. According to the handheld low-power-consumption temperature and humidity detector, during collection, the DC-DC power conversion circuit and the LDO power conversion circuit are selected in a time-sharing mode, so that high-quality collection is guaranteed, meanwhile, the power consumption of the handheld low-power-consumption temperature and humidity detector is low, the standby time of an instrument is greatly prolonged, and the competitiveness of the instrument is improved. 本发明公开了一种手持式低功耗温湿度检测仪，包括供电单元和主电路单元；所述供电单元包括电池、开关机检测电路