YSI Multiparameter Sondes Type 6920 V2 .... of reading or 1% air saturation, whichever is greater; 200 to 500% : Â ± 15% of reading ROXâ „ ¢ Optical Dissolved Oxygenâ € ¢ mg/ L Range : 0....
YSI Multiparameter Monitoring and Control Type .... 0 to 200% :  ± 2% or  ± 0.2 mg/ L, whichever is greater; 200 to 500% :  ± 6% of reading Dissolved Oxygenâ € ¢ mg/ L Range : 0 to 60 mg/ L ....
YSI Lab / Field Dissolved Oxygen Type Pro20 .... reading or  ± 2% air saturation, whichever is greater; 200 to 500% air saturation,  ± 6% of the reading Resolution : 0.1% or 1% air....
YSI Handheld Conductivity Temperature Type EC300 .... Accuracy :  ± 0.2 ° C or  ± 0.4% , whichever is greater Resolution : 0.1 ° C....
YSI Dissolved Oxygen Temperature Type DO200 .... reading or  ± 2% air saturation, whichever is greater Resolution : 0.1% air saturation Dissolved Oxygen ppm ( mg/ L) Range : 0....
YSI Dissolved Oxygen Temperature Type 550A .... 2% of reading or 2% air saturation, whichever is greater; 200 to 500% : Â ± 6% of reading Resolution : 0.1% air saturation or 1% ; selectable ....