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pH/ORP Analyzers

The innovative PH450G 4-Wire pH/ORP Analyzer has a touch screen and is a reliable instrument with high functionality. It is used in medium-scale wastewater treatment and general pH measurement control applications in various industries. It has four contact outputs that can be used for diagnostics, wash routines, and alarm or PID controls.

The FLXA21 is a next-generation modular liquid analyzer that can be flexibly configured to measure pH/ORP, contacting conductivity, inductive conductivity, or dissolved oxygen. The FLXA21 also supports the installation of up to two sensors of the same type, thereby reducing installation costs and saving space in addition to enabling the configuration of a highly reliable backup system.


The PH202 pH/ORP Analyzer is designed for a 2-wire system configuration and is ideal for large-scale instrumentation. It can be used in hazardous areas and supports digital communications using the HART, Profibus-PA, or Fieldbus protocols.

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Yokogawa's personal pH/ORP meter is compact and lightweight portable instruments, making them well suited for use in the field and in the laboratory.
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pH71 Personal pH Meter

pH Sensor with RTD PH4PT

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SENCOM® Series is comprised pH/ORPAnalyzers and sensors with Disital Sensor Communication, and PC Software.



SENCOM Sensor SC25F

FU24F pH/ORP SECOM Sensor

SC25F SENCOM® digital sensor shows how Yokogawa applies the motto "Simply the Best" to sensor technology. Setup of the sensor is very easy because sensor specific characteristics such as calibration data are stored in the sensor automatically.

Processes in which sensors are subjected to pressure changes normally decrease the useful life time. The internal pressure compensation feature of the analogue is made available for customers using digital sensors in the FU24F sensor.


SENCOM pH/ORP Sensor FU20F
SPS24 SENCOM PC Software

FU20F SENCOM® digital sensor shows how Yokogawa applies the motto "Simply the Best" to sensor technology. Setup of the sensor is very easy because all sensor specific characteristics, such as calibration data, are stored in the sensor.

The new SENCOM® PC Software SPS24 offers a unique means to optimize the performance of pH/ORP sensors for enhanced reliability and process safety. The software allows the operator to monitor pH/ORP sensor performance, calibrate and configure various parameters.

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Polymer Electrolyte pH/ORP Sensor

Polymer Electrolyte pH/ORP Sensors allow pH/ORP measurement under severe conditions, such as where the process fluid is heavily contaminated or contains sulfide.


pH Sensor PH4P

pH Sensor with RTD PH4PT

With polymer used as the inner solution, the liquid junction is large, and there are 2 single pores, which prevent clogging.

PH4PT is a Polymer Electrolyte pH Sensor with RTD (resistance temperature detector) .



ORP Sensor or4P

With polymer used as the inner solution, the liquid junction is large, and there are 2 single pores, which prevent clogging.


HF-Resistant pH Sensor

The special sensing membrane allows measurement of solutions or drainage containing hydrofluoric acid.


pH Sensor PH4f

pH Sensor with RTD PH4fT

With polymer used as the inner solution, the liquid junction is large, and there are 2 single pores, which prevent clogging.

PH4FT is a Polymer Electrolyte pH Sensor with RTD .


pH/ORP sensor for Chemical Process

pH/ORP sensors for Chemical Process allow extremely long life span for pH measurement in electrolytic process.


pH Sensor PH4C

pH Sensor with RTD for Chemical Process PH4CT

With the pressurized inner solution, a pressure holder is not needed.

PH4CT is a pH Sensor with RTD for Chemical Process .



ORP Sensor OR4C

The reference electrode is composed of silver ion trap which inhibits the generation of sulfide around the ceramic liquid junction.


pH sensor for Fermentation

The reference electrode is composed of silver ion trap which inhibits the generation of sulfide around the ceramic liquid junction.


pH sensor for Fermentation PH4FE

Inner solution can be refilled.


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FU20 pH/ORP Combination Sensor

PH8ERP, PH8EFP pH Sensors, OR8ERG, OR8EFG ORP Sensors

The FU20 comes with a single wide body sensor that can simultaneously measure pH, ORP, and temperature. The sensor body is constructed of durable Ryton and is resistant to shock.

These pH and ORP sensors have a Ryton body that is highly resistant to corrosion, heat and mechanical shock, making them well suited for a wide range of applications.


FU20 pH/ORP Combination Sensor

PH8ERP, PH8EFP pH Sensors, OR8ERG, OR8EFG ORP Sensors

The heart of a pH measuring loop is the electrode system. Yokogawa has designed a wide range of sensors to ensure this heart keeps beating under the most severe conditions.

These sensors are used for the pharmaceutical and biotechnology industries and in food production processes such as fermentation.

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Various types of analyzers are used to control quality and wastewater in a wide variety of production processes.
Holders are used to set up analyzers at sites of measurement.
Yokogawa provides several types of holders, for which cleaners can be added, allowing customers to build reliable and easy-to-maintain measuring systems by selecting the right holders and cleaners for the conditions of applications.