SD Card real time data recorder 
DISSOLVED OXYGEN METER 
Model : DO-5512SD 
* Real time data recorder, save the data into the SD memory card and can be download to the 
 Excel, extra software is no need. 
* Dissolved oxygen range : 0 to 20 mg/L. 
* Auto temp. compensation, Auto Calibration. 
* % salt and height value compensation adj.. 
* The polarographic type oxygen probe with an incorporated temperature sensor. 
* Probe head with diaphragm set and electrolyte are included. 
* Record (Max., Min.), Data hold, zero adjust. 
* RS232/USB computer interface, Patented.
* Patent: Taiwan, China, Japan, Germany, USA pending.