QiWei PHB-1 and QiWei PHB-4 compare

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Model selection comparator If you have any questions, please click below Service	QiWei PHB-1 pH meter (portable microcomputer) 390.0 RMB China Detail	QiWei PHB-4 pH meter (portable microcomputer) 630.0 RMB China Detail

Model comparison

Type	Portable	Portable
Range	0~14PH	0~14PH
Accuracy	±0.01	±0.01
Accessories

Parameter comparison

Measurement parameters		pH, mV, temperature
PH range	0~14pH	0~14pH
pH measurement Accuracy	±0.01pH
resolution	pH: 0.01pH/Temperature: ± 1 ℃
Temperature Measurement range	0~60 ℃ manual compensation
Stability (zero drift)	≤ 0.01pH ± 1 word/2h	≤ 0.01 pH +/- 1 word/2h
input impedance	> 1x1012OH
data storage	without
Power	1.5V battery/4 cells
Dimensions	1808030mm	1808030mm
Weight	About 0.5Kg	About 0.5Kg
Standard electrode reagent	E201-C plastic case PH composite electrode; PH standard calibrated sample; No. 7 DC1.5V battery 4	E201-C-W plastic case PH temperature electrode; PH standard calibrated sample; No. 7 DC1.5V battery 4
Allowable environment temperature	0~40℃
Allowable Relative Humidity	<85%	<85%
Solution temperature compensation range	0~60℃	0~60℃
Power consumption	2W
Temperature measurement Accuracy	±1℃
mV range	±1600mV

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