pH Meters

BI-620 Industrial Online pH Controller

Industrial online pH controller, 1 to 3 points calibration, 4 to 20 mA outputs, the meter is suitable for monitoring pH in the chemical, environmental protection and food industries.

• Economical online pH controller comes with an industrial pH electrode.
• 1 to 3 points calibration with auto-buffer recognition.
• Selectable pH buffer set, including the USA and NIST options.
• Automatic temperature compensation ensures accurate readings over the entire range.
• Automatic electrode diagnosis helps the user decide whether to replace the sensor.
• Setup menu allows setting the number of calibration points, alarm limits, hysteresis value,
  4 to 20 mA output, etc.
• Reset function automatically resumes all settings back to the factory defaults.





-1.00 to 15.00 pH


0.01 pH


±0.01 pH


1 to 3 points

   pH Buffer Options

USA (pH 4.01/7.00/10.01) / NIST (pH 4.01/6.86/9.18)



-1000 to 1000 mV


1 mV


±1 mV



0 to 100°C / 32 to 212°F




±1°C / ±1.8°F


1 point

   Calibration Range

Reading ±10°C/°F


   Signal Output

4 to 20 mA

   High/Low Limit Alarm

0.00 to 14.00 pH, selectable


Maximum 500 Ω

   Communication Interface


   Connection Terminals

Detachable screw terminals

   Other Specifications

   Temperature Compensation  

0 to 100°C / 32 to 212°F, automatic

   Environmental Conditions

0 to 50°C / 32 to 122°F, relative humidity < 80%


Custom LCD (70 × 45 cm)

   Power Supply

DC 24V


96 × 96 × 75 mm


350 g

   Ordering Code

Meter Includes


IE-20T industrial pH electrode

pH 4.01, 7.00, 10.01 buffer reagents

Items Description
IE-20T pH Electrode Cable length 5 meters (16 ft)
pH Buffer Solutions For pH calibration
pH Electrode Storage Solution For electrode maintenance and storage
pH Electrode Cleaning Solution For general cleaning
pH Electrode Cleaning Solution For removing the protein contamination

   Ordering Code

Dimensions and Weights


28 × 22 × 15 cm, 1.5 kg