pH / ORP

Xylem Analytics - monitoring pH

pH determines the acid and base characteristics of water. A pH of 7.0 is neutral; values below 7 are acidic and values above 7 are alkaline. Excessively high or low pH levels are often associated with nutrient deficiencies, metal toxicities, or other problems for aquatic life. High pH makes ammonia more toxic. During algal blooms, photosynthesis increases the water pH, especially in stagnant or slow-moving water.

pH is measured by a sensing electrode for Hydrogen and a reference electrode along with a meter to measure the electrode potential. The Xylem YSI pH sensor is a glass bulb filled with a solution of stable pH (usually 7), so the inside of the glass surface experiences constant binding of H+ ions. The outside of the bulb is exposed to a water sample where H+ varies. The resulting differential of H+ creates a potential which is read by the meter versus the stable potential of the reference electrode.

Resources

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  • Sensor
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YSI 9500 Photometer

YSI 9300 + 9500 Photometer

The YSI 9300 and YSI 9500 are economical photometers in small packages for any application. These portable photometers allow you to easily take readings directly in the field for 100+ parameters.

WTW MultiLine® IDS

WTW MultiLine® IDS Series of Multi-parameter Portable Meters

The new multi-parameter systems with intelligent, digital sensors for pH, dissolved oxygen (DO) and conductivity measurement revolutionize multi-parameter measurement:
The signal processing is completely located in the sensor, and the measuring signal is transmitted to the meter without interference and in a clearly identifiable manner via thin, highstrength cables. A wide range of sensors are available for virtually every application.

YSI Pro Plus multiparameter instrument

YSI Professional Plus Multiparameter Meter

The YSI Professional Plus handheld multiparameter meter provides extreme flexibility for the measurement of a variety of parameters such as DO, conductivity, specific conductance, salinity, resistivity, total dissolved solids (TDS), pH, ORP, pH/ORP combination, ammonium (ammonia), nitrate, chloride and temperature.

YSI ProDSS Handheld Instrument

YSI ProDSS - Digital Sampling System

The YSI ProDSS (digital sampling system) handheld multiparameter meter provides extreme flexibility for the measurement of a variety of combinations for dissolved oxygen, turbidity, conductivity, specific conductance, salinity, resistivity, total dissolved solids (TDS), pH, ORP, pH/ORP combination, ammonium (ammonia), nitrate, chloride and temperature along with depth.

PRO10 handheld pH or ORP meter

YSI Pro10 pH / ORP Meter

The Pro10 provides everything you need in a handheld meter that measures temperature along with either pH or ORP (redox). Rugged, simple and reliable. Measure pH or ORP, and temperature.

Pro1020 Handheld DO pH Meter

YSI Pro1020

The Pro1020 provides everything you need in a handheld meter that measures dissolved oxygen and temperature along with either pH or ORP (redox). Rugged, simple and reliable. Measure pH or ORP, dissolved oxygen, and temperature.

handheld pH/Conductivity or ORP/Conductivity Meter

YSI Pro1030

The Pro1030 provides everything you need in a handheld meter that measures pH or ORP (redox) along with conductivity. Rugged, simple and reliable. Measure pH or ORP, salinity, conductivity, specific conductance, TDS, and temperature.

EcoSense pH100A Meter Kit

YSI EcoSense pH100A Meter Kit

YSI's EcoSense® product line of compact, handheld instruments includes the pH100A pH meter. For simple, one handed operation for pH readings or mV values and temperature the pH100A is a logical choice.

SI Analytics HandyLab 100 Portable pH Meter

SI Analytics HandyLab 100 Portable pH Meter

The HandyLab 100 increases the measuring speed and accuracy thanks to the AutoRead and the CMC function. AutoRead displays when the measuring value is stabile and eliminates the risk of a premature reading of the faulty measuring value. CMC (Continuous Measurement Control) visualizes whether the measuring value is still within the calibration limits. Having storage capacity for up to 200 data sets, stored data can be viewed.

YSI EXO1 and handheld

YSI EXO1 Multiparameter Sonde

Capturing accurate data in fresh water, ground water and marine aquatic environments is easy with the versatile multiparameter EXO1 sonde. Ideal for estuarine, surface water or ground water applications.

Instrument Only. Cables, probes/sensors, and accessories sold separately - please see the "Accessories" tab for details.

YSI EXO2 multiparamter water quality instrument

YSI EXO2 Multiparameter Sonde

The EXO advanced water quality monitoring platform includes the versatile multiparameter EXO2 sonde for oceanographic, estuarine, or surface water applications. Collect data to 250m with the advanced EXO2 sonde – contains six replaceable 'smart' sensors and a central wiper to clean biofouling.

6600V2 Sonte

YSI 6600 V2 Sonde

The YSI 6600 V2 data sonde is the most comprehensive water quality monitoring equipment available with simultaneous measurement of conductivity (salinity), temperature, depth or level, pH/ORP and...

6920 V2 Sonde

YSI 6920 V2 Sonde

The YSI 6920 V2 sonde is an economical water quality logging system, ideal for long-term in situ monitoring and profiling.Real-time turbidity monitoring, dissolved oxygen monitoring, algae monitoring, and more.

SensoLyt® pH/ORP sensors

WTW SensoLyt® pH / ORP Sensors

For continuous pH/ORP measurement, especially under the difficult conditions very often found in sewage treatment facilities, very high demands are made concerning the reliability and operating safety of the systems employed.

pH combination electrodes

Meinsberg pH Combination Electrodes

pH combination electrode series: EGA 133 I, EGA 140, EGA 143, EGA 150 I, EGA 153 I, EGA 161 L/PG, EGA 173 I, EGA 233 I, EGC 151 I/S, EGP 150 I, EGV 150 I

SI Analytics ProcessLine electrodes

SI Analytics ProcessLine Electrodes

The special construction of the ProcessLine electrodes brings them very close to the optimum for liquid electrolyte electrodes with respect to their accuracy, stability, rapid response and long working life.

SI Analytics Memosens® Electrode

SI Analytics Memosens® Process Electrode

Our Memosens® program contains pH and redox electrodes. They are compatible to all at the market available measuring devices based on the Memosens® protocol. Following the in the analog segment already established electrodes of the series ProcessLine, SteamLine and annular-gap electrodes our new Memosens® electrode program also contains the upcoming FlowLine series. FlowLine is a new line of liquid-electrolyte electrodes with integrated plastic miniature pressure adapter for the hose connection to the electrolyte reservoir. All Memosens® electrodes are equipped with a NTC 30 kΩ temperature sensor.

YSI Science pHT-G

YSI Science pHT-G pH Electrode

Our pH electrodes are designed to meet the requirements of a wide variety of laboratory applications. pH electrode options include single, double or triple junction, 3-in-1, micro for small samples, refillable or non-refillable and other special configurations like Iodine/Iodide reference, Platinum junction or ground junction.

YSI Science pHT-Micro

YSI Science pHT-Micro pH Electrode

Our pH electrodes are designed to meet the requirements of a wide variety of laboratory applications. pH electrode options include single, double or triple junction, 3-in-1, micro for small samples, refillable or non-refillable and other special configurations like Iodine/Iodide reference, Platinum junction or ground junction.

YSI TruLine pH 27

YSI TruLine pH 27 Electrode

Our pH electrodes are designed to meet the requirements of a wide variety of laboratory applications. pH electrode options include single, double or triple junction, 3-in-1, micro for small samples, refillable or non-refillable and other special configurations like Iodine/Iodide reference, Platinum junction or ground junction.

6589 Fast-Response pH Sensor

YSI 6589 Fast-Response pH Sensor

Simple, accurate pH measurement in sensors designed for minimal maintenance in sampling, profiling, and long-term monitoring applications.

WTW Inolab 9430

WTW inoLab® pH Benchtop Meters

The inoLab® family: Advanced measuring technology offers new functions including automatic AutoRead or CMC (Continuous Measurement Control) making measurements more convenient and reliable than ever.
The user interface, large display and keypad with tactile feedback provide an exceptional user experience and error-free operation.
All benchtop meters are available in application oriented sets including sensors and accessories.

YSI MultiLab 4010-1 Laboratory Instrument

YSI MultiLab 4010-1

Connect digital IDS sensors to the MultiLab 4010-1 for the measurement of pH, ORP, conductivity, and DO/BOD.

YSI MultiLab 4010-2

YSI MultiLab 4010-2

Laboratory Instruments for pH, ORP, conductivity, BOD and Ion Activity Measurement
Connect digital IDS sensors to the MultiLab 4010-2 for the measurement of pH, ORP, conductivity, and DO/BOD in any combination. Ion selective electrodes (ISEs) can also be connected to the instrument.

YSI MultiLab 4010-3

YSI MultiLab 4010-3

Laboratory Instrument for pH, ORP, Conductivity, BOD and Ion Activity Measurement
Connect digital IDS sensors to the MultiLab 4010-3 for the measurement of pH, ORP, conductivity, and DO/BOD in any combination. Ion selective electrodes (ISEs) can also be connected to the instrument.

TruLab pH/ISE 1320

YSI TruLab 1320 pH/ISE

Measure pH, ORP, and ion activity with the TruLab 1320 dual channel instrument by choosing from our wide selection of electrodes.

SI Analytics Lab 855 pH Benchtop Meter

SI Analytics Lab 855 pH Benchtop Meter

<p>The <a href="/brandsdetail.php?SI-Analytics-8">SI Analytics</a> Lab 855 for pH and <a href="/productsdetail.php?SI-Analytics-Lab-955-Conductivity-Benchtop-Meter-228">Lab 955</a> for conductivity measurements are perfectly suited benchtop meters for measurements in laboratories, in the chemical and pharmaceutical industries as well as in medical labs.</p>

SI Analytics Lab 865 pH Benchtop Meter

SI Analytics Lab 865 pH Benchtop Meter

The SI Analytics Lab 865 pH benchtop meter provides the maximum degree of operating comfort, reliability and measuring certainty for all applications - perfect for precise pH measurements in quality assurance labs requiring GLP documentation.

Seaguard RCM

Aanderaa SeaGuard RCM

The single-point SEAGUARD® RCM series is a completely new generation of current meters based on the SEAGUARD® datalogger platform and the ZPulse® multi-frequency Doppler Current Sensor (DCS). SEAGUARD® Products are based on modern technology and are the basic modules of our underwater observatory. They may be used as a multi-parameter instrument in the sea and in freshwater and feature a modular plug-and-play architecture.

Seaguard II DCP

Aanderaa SeaGuard II DCP

The brand new acoustic profiler joining the SeaGuard family. It features innovative development of the acoustic profiling capacity and an exceptional ability to collect high quality current information on moving and tilting moorings. Available as a self-recording instrument, it also integrates unique real time features to meet your application needs.

WTW 2020 XT

WTW IQ SensorNet 2020 XT Controller

With an easily scalable solution, the 2020 XT allows for the connection of up to 20 sensors. This modular plug-and-play system allows you to monitor the water quality in your wastewater system continuously and accurately.

Seaguard RCM Blue

Aanderaa RCM Blue

The RCM Blue is a self-recording Current Meter which measures water temperature in salt or fresh water, and a battery container with battery capacity up to 70Ah. The Doppler Current Sensor is an upgraded version of the proven SeaGuard ZPulse sensor. The instrument configuration and data retrieval is done via Bluetooth which eliminates the need to open the pressure case for repeated deployments.