• Common Question and Technical Information 
  • HORIBA to Supply Water Quality Sensor to NASA

HORIBA received an order from the United States National Aeronautics and Space Administration (NASA), to supply water quality sensors to be used in the medical intravenous (IV) fluid production device... Read more

- Enabling the intravenous fluid production in the space

 In the lab, in the field or anywhere you need it

Polycarbonate resin is adopted to enhance shock resistance and chemical resistance, creating a tough body that is endurable even in harsh environments. The intuitive and natural operability of LAQUAact, combined with a "Versatile" ability, brings a dynamic measurement experience.


Basic model

CH.1 pH


Backlight model



Backlight model




Backlight model



HORIBA Water Quality Textbook

Here, we offer an introductory course on pH and water quality. We explain—as simply as possible—what pH, conductivity and ions are, and their relevance to our everyday lives, allowing people who are not familiar with these concepts to understand them easily.

The Story of pH

The Story of ORP

The Story of Ion

The Story of Salt

The Story of Conductivity

The Story of Dissolved Oxygen


pH Electrodes
Our pH electrodes have a broad line-up according to sample, container and application type.

Metallic Electrode(For ORP Measurement)
Waterproof. Use a flat type metallic electrode, which allows a small amount of sample to be measured.

Ion Electrodes
HORIBA's years of experience and know-how in this field are behind the wide range of ion electrodes we offer.

Conductivity Cells
HORIBA's conductivity electrodes also have a built-in thermistor for temperature measurement, making them perfect for for temperature measurement and for obtaining values equivalent to those at the standard 25℃ when used in conjunction with the conductivity meter.

Dissolved Oxygen Electrodes
HORIBA's DO electrodes use innovative disposable probe tips. This eliminates the troublesome replacement of membranes and fluid that plagued conventional methods.

D-50 handheld pH meter

Tragbares Multiparameter-Wasserqualitätsmessgerät in verschiedenen Ausführungen, sowohl für Freiland- als auch Laboreinsatz geeignet

ES-51 Handy type Conductivity/Resistivity/Salinity meter

Das tragbare E-51 bestimmt die Leitfähigkeit, den elektrischen Widerstand und den Salzgehalt in wässrigen Lösungen.

OM-51 Portble Dissolved Oxygen meter

Das OM-51 ist ein portables Sauerstoffmessgerät, dass über einen RS232C Output und somit über einen PC oder Druckeranschluss verfügt.

U-50 Multiparameter Water Quality Checker

Messen Sie mit Hilfe eines neu designten Bedienelements und der neuen Sensortechnologie bis zu 11 verschiedene Parameter gleichzeitig. Optimales Design und intuitive Software gewährleisten eine einfache, genaue und zuverlässige Messungen sowohl in Grund- und Oberflächenwässern.