The measurement unit can be switched freely. (no need to input molecular weight for conventional gas, input molecular weight of special gas, the detector will tomatically calculate and switch) Partial or full recovery can be selected, eliminating worries csed by wrong operation. Standard configuration of 100,000 data storage capacity, larger capacity can be customized; SD card storge is optional, support real-time storage, timing storage, or only alarm concentration data and time. Support local view and delete data, also can upload data to computer through USB, use upper computer software to analyze data, store and print. RS485 is optional. 2.31 inch high-definition color screen, display real-time concentration, alarm, time, temperature, humidity, storage, communication, power, charging status, concentration unit, gas molecular , gas name and other information, the menu interface uses high-definition simulation graphics to display the function names of each menu. Large-capacity data storage function, support multiple storage methods., Manufacturer: SLZJWLPPA