QiWei PH-220 and YUEFENG PHB-4 compare

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Model selection comparator If you have any questions, please click below Service	QiWei PH-220 PH meter (pen) 190.0 RMB China Detail	YUEFENG PHB-4 Portable acidity meter 780.0 RMB China Detail

Model comparison

Type	Pen style	Portable
Range	0~14PH	0~14PH
Accuracy	±0.02	±0.01
Accessories

Parameter comparison

Measurement parameters
PH range	0.1~14pH	0~14.0pH
PH measurement Accuracy	±0.02pH	±0.01pH
temperature compensation
Stability (zero drift)
input impedance
Storage function
Power	1.5V battery (LR44) * 4PCS	6V regulated Power , 4 AA batteries
Dimensions	F40 * 185mm
Weight	88g
Standard electrode reagent
Allowable environment temperature	0~50℃
resolution	0.01pH	0.01pH
PH calibrated	PH: 25 ℃ three point calibrated (4.01, 6.86, 9.18)
temperature resolution	0.1℃(1℉)	0.1℃
Temperature measurement Accuracy	1℃	±1.0℃
Temperature Measurement range	0~50℃/32~122℉	0.0~80.0℃0~80℃

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