Micro Volume pH Monitor UP-100


Redevelops HORIBA's founding pH measurement technology using new ultra-small capillary electrode. HORIBA's UP-100 affords ultra-low sample consumption of just 500 uL/measurement, enabling continuous pH monitoring for a variety of critical manufacturing processes that include Semiconductor (Cleaning, Etching and Plating); Chemical Manufacturing, Bio, Pharm, Food Processing, etc.
Designed for 6 month continuous operation without operator intervention for minimizing downtime


  • Consumes only 500μL/minute, Maximum 30 mL/hour.
  • Real-time measurement
    One minute measurement interval (minimum)
  • Includes internal storage of standard solutions for automatic calibration and replenishment of KCl

Manufactured by HORIBA Advanced Techno


Information shown on the display

1. pH or electrode voltage (selectable)
2. Temperature

Measurable range

0.00 to 14.00 pH

Repeatability performance

+/-0.10 pH (when monitoring pH4 standard buffer solution, within +/- 1.0 deg.C)


 +/- 0.10 pH / hour (when monitoring pH4 standard buffer solution, within +/- 1.0 deg.C)

Data output

RS-485, Analog 4 - 20 mA


UP-100 Schematics


  • Etching and cleaning process in semiconductor manufacturing
  • Food manufacturing process
  • Pharmaceutical Manufacturing
  • Bio process