kedida CT-6821 and QiWei PH-220B compare

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Model selection comparator If you have any questions, please click below Service	kedida CT-6821 PH & ORP meter 360.0 RMB China Detail	QiWei PH-220B Pen acidity meter 210.0 RMB China Detail

Model comparison

Type	Pen style	Pen style
Range	0~14PH	0~14PH
Accuracy	Miscellaneous	Miscellaneous
Accessories

Parameter comparison

Measurement parameters
PH range	0.0~14.0pH	0.01~14.00pH
PH measurement Accuracy	±0.1pH	±0.02PH
resolution	±0.1pH /±2mV;	0.01PH
Temperature Measurement range	0~50℃	0-50℃/32-122℉
Stability (zero drift)
input impedance
data storage	Yes.
Power	6V (4 * AG13 button battery)	1.5V battery (LR44) * 4PCS
Dimensions	188 * 38mm including electrode	F40 * 185mm
Weight	82g	88g
Standard electrode reagent
Conditions of use
Display	LCD
Display size	20*27mm
Calibrated	pH (4.0; 6.8; 9.1) three-point correction; ORP has been corrected before leaving the factory and can be used directly;
Temperature display	0.1℃
Temperature measurement Accuracy	1℃/2℉
Allowable environment temperature	0~50℃	0-50℃（32-122F）
show	Dual display of pH and temperature;
Keep function	Yes.
Backlight function	Yes.
Automatic shutdown	Yes.
Low Voltage prompt	Yes.
mV measurement Accuracy	±5mV
mV range	±500mV

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