This data logger is mainly used to record the temperature and humidity of food,pharmaceuticals and chemicals,etc.in the storage and transportation.It is widely applicable to each link in storage and logistics of cold chain,such as refrigerated container,refrigerator truck,cooler bag,cool cabinet,medicine cabinet,cold storage,laboratory,etc.This data logger conforms to GSP standard of new edition.It has one big LCD screen,a button,an external temperature sensor and an external humidity sensor.With two modes to save data:full record stop and cyclic record,the data logger has the functions of over limit sound-light alarm.It can also automatically shorten the record interval in case of over temperature and humidity limit. Two pieces of built-in magnets are convenient to fix the data logger onto metal material surface.