Product features:  
PHS-25 type pH meter is a kind of digital display PH meter. It is suitable for colleges, universities, research institutes, environmental monitoring and mineral enterprise for testing of PH and MV of water solution.

Technical index:
instrument level: 0.1
measurement range: pH 0.00~14.00pH ;  
mV 0 ～ ± 1400mV 
resolution ratio: 0.01pH , 1mV , 0.1 ℃ 
temperature compensation: 0 ～ 60 ℃ ;  
electronic unit intrinsic error: pH ± 0.05pH ;  
mV ± 1% ( FS ) 
instrument intrinsic error: ± 0.1pH ;  
electronic unit incoming current: no more than 1 × 10 － 11 A 
electronic unit input impedance: no less than 3 × 10 11 Ω 
electronic unit repeatability error: pH 0.05pH 
mV 5mV 
repeatability error: no more than 0.05pH 
electronic unit stability: ± 0.05pH ± 1 /3h 
boundary dimension: 220 × 160 × 65mm ( l × b × h ) 
weight: 0.3kg 
application condition:  
a) environment temperature: ( 5 ～ 50 )℃ 
b) relative humidity : ≤ 85% 
c) power supply: DC6V