Skip to main content
U.S. flag

An official website of the United States government

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Accumet Research Model AR25 pH Meter

Accumet Research pH Meter

Accumet Research Model AR25 pH Meter. Please see manual.


  • Meter Size: 13.97 cm x 19.1 cm x 8.3 cm (5.5" x 7.5" x 3.25")
  • Operating Temperature: 5-45°C
  • Memory: 250 data pts.
  • Keyboard Controls: context specific touchscreen
Mode Range Resolution Relative Accuracy Notes
pH -2.000 to 20.000 0.1/0.01/0.001 ±0.002  Automatic Buffer Recognition: yes
 Manual Buffer Recognition: yes
 Calibration Points: 5
 Auto Lock: yes
 FET: yes
mV ±1800.0 0.1 ±0.1   
Ion 1x10-6 to 9.99x1010 0.1/0.01/0.001 ±0017n%  Calibration Points: 5
 Incremental Methods: KA,KS,AA,AS
Temperature -5.0°C to 105.0°C 0.1°C ±0.2°C   
Created May 18, 2011, Updated April 5, 2022