PHB-Y4 portable pH meter PHB-Y4 portable pH meter is a 31/2 digit LCD digital display pH meter (hereinafter referred to as equipment). Laboratory equipment is suitable for acidity, medicine, factories, chemical industry, environmental protection, mine assay laboratory and other aqueous samples (pH value) and the measuring electrode potential (mV value), it is easy to carry, not only practical in the laboratory, more practical Production at the field site. If coupled a suitable ion selective electrode, the terminal can be analyzed as an indicator potentiometric titration. Technical characteristics of the instrument 1. The main parameters of the instrument (1) Measuring range: pH profile: 0 ~ 14.00pH mV files: 0 ~ ± 1400mV (automatic polarity display) (2) Accuracy: pH profile: 0.02pH ± 1 word mV shift: ± 0.2% (FS) ± 1 word matching accuracy: 0.02pH / 3pH (3) Input impedance: 1012Ω (4) Zero drift:? ± 0.02pH / 2 hours (5) 31/2 digit LCD display ( 6) solution temperature compensation range: 0 ~ 60 ℃ (manual) (7) Instrument dimensions: length 180, width 80, height 40 2. Instrument Features (1) Ambient temperature: 5 ~ + 40 ℃; (2) the relative humidity : not more than 85% (3) the measured solution temperature: 0 ~ 60 ℃ (4) 9V, 6F22 battery a