pH Analyzers

pH meters, analyzers and transmitters are used for continuous process monitoring of pH to ensure water/product quality, monitor effluent discharge, batch neutralization, pulp stock, scrubbers, cooling towers, chemical, water/wastewater treatment and many other applications.

What is a 4-Wire analyzer?

This terminology only refers to power supply of the analyzer. It does not have any reference to the number of wires. The 4-wire analyzers separate the power supply from the measurement output. As a minimum we need two wires for the power supply and two wires for the current output of the analyzer. The EXA450 has two analog outputs. four digital outputs. One digital input and of course the sensor input wiring. That is why EXA450 has 6 cable glands. The advantage is that any functions are combined in one enclosure. Local control and alarm functions are possible. In small control installations this is a cost saving feature.

What is a 2-Wire analyzer?

The 2-wire analyzers commonly referred to as Analyzers combine the wires for current output, for power supply and digital communication. The FLXA21 combines the power supply with mA output and HART® communication: all with only two wires plus shield. The advantage is safety (only 24VDC) and simple installation. Just two wires between control room and analyzer. This is an advantage in large scale operations where process control is centralized in the DCS system. 

Pure Water and Ultrapure Water PH/ORP Analyzer

Intended for the pure water and ultrapure water applications found in the semi-conductor, power, water and pharmaceutical industries. These analyzers work with any pH/orp sensor that does not have a preamplifer built onto the sensor.

4-Wire pH/ORP Analyzer PH450

The new EXAxt 450 series builds on the superior functionality of the industry leading Yokogawa EXA series by enhancing the EXA's proven operation and application flexibility. The Model 450 series feature a uniquely simple touch screen menu structure that offers a choice of five different languages (English, French, German, Italian or Spanish).

2-Wire Transmitter/Analyzer FLEXA

The model FLEXA® two-wire analyzer is used for continuous on-line measurements in industrial installations. It offers an option for single or dual sensor measurement, making it the most flexible 2-wire analyzer available. The model FLEXA® modular designed series analyzer offers 4 parameter choices – pH/ORP (oxidation-reduction potential), contacting conductivity (SC), inductive conductivity (ISC) or dissolved oxygen (DO) – with the respective sensor module.

Hazardous Area pH/ORP Transmitter/Analyzer

Intended for the applications in Class I Div I and Class I Div II areas. 

Modular Dual Input Transmitter/Analyzer FLEXA

The model FLEXA® two-wire analyzer is used for continuous on-line measurements in industrial installations. It offers an option for single or dual sensor measurement, making it the most flexible 2-wire analyzer available. The model FLEXA® modular designed series analyzer offers 4 parameter choices – pH/ORP (oxidation-reduction potential), contacting conductivity (SC), inductive conductivity (ISC) or dissolved oxygen (DO) – with the respective sensor module.

Fieldbus pH/ORP Transmitter/Analyzer

This analyzer is designed for 2-wire (loop powered) system configuration with Foundation Fieldbus communication. Fieldbus Foundation defines "Fieldbus is a digital, two-way, multi-drop communication link among intelligent measurement and control devices."

Profibus pH/ORP Transmitter/Analyzer

This analyzer is designed for 2-wire (loop powered) system configuration with Profibus communication.

Personal Handheld Meter PH71/PH72

The PH71/PH72 pH and/or ORP meter is a Compact, Easy-to-use, Drip proof – Ideal for Field Use. Features "One-Touch Calibration" and Temperature Compensation. Laboratory-Grade Intelligent pH Meters – Sized and Priced to Fit in Your Pocket