pH and Electrochemistry

Instruments and other methods to measure pH, conductivity, specific ions, dissolved oxygen, and other parameters; may be handheld or benchtop and manual or electronic (analog or digital); includes pH indicator papers, electrodes, and other probes.

pH and electrochemistry meters and related products are used to assess acidity and alkalinity, conductivity, specific ion concentrations, and dissolved oxygen in water, wastewater, and other solutions. Electrochemistry meters may measure a single parameter (like pH) or they may be multiparameter meters, capable of performing a combination of tests (pH plus conductivity, for example).

Electrochemistry meters are used with various probes and electrodes designed for specific purposes or types of solutions. Electrodes with epoxy bodies are useful for testing food, beverages, and other materials where broken glass could be a problem. Other electrodes are made to withstand higher than usual impact; for use with solutions that contain large particulates; and for compatibility with biological buffers.

Electrodes must be carefully stored and maintained for optimal performance. It’s important to select the right storage bottles and electrode filling, cleaning, rinsing, and storage accessories.

Electrochemistry meters also require regular calibration and maintenance. Standard and certified pH buffers as well as conductivity and specific ion standards are available. Other accessories include electrode supports, bulb guards, cables, connectors, and adapters.

Indicator paper and test strips are another simple, portable, and qualitative way to quickly determine pH and other analytes. The paper or strips contain chemical indicators that produce color reactions. A comparison chart (included) helps to interpret the results. Available in various pH ranges, these are sometimes called “litmus” paper.

Probes and Electrodes (3,073)

pH and Electrochemistry Meter Accessories (1,459)

pH Paper and other Test Strips (1,382)

Electrochemistry Meters (796)

pH Meters (533)

Benchtop Titrators (170)

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16 – 30 of 6,432 results

Ohaus™ Starter ST20M-C Multi-Parameter Pen Meter

Compact design for fast, convenient electrochemistry reading. Measure conductivity, pH, temperature and salinity with the same meter. IP67, automatic temperature compensation, 3-point calibration and auto-off after 6 minutes of non-use

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METTLER TOLEDO™ Portable pH/Conductivity/Dissolved Oxygen/Ion Meters

Water and dust proof, IP67 rated meter for portable or field measurements. Portable meters compatible with pH, conductivity, dissolved oxygen, and ion selective electrodes.

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Specifications

IP Rating	IP67
Certifications/Compliance	ISO 9001:2000

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Mettler Toledo™ pH/Conductivity/DO Meter NineFocus™ NF2340™

High-performance, multiparameter benchtop meter for compelling precision in pH, conductivity, ion concentration, redox, and dissolved oxygen determinations.

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Thermo Scientific™ Elite CTS Conductivity / TDS / Salinity Pin-sensor Pocket Testers and Replacement Sensors

Flexible on-the-go conductivity, TDS, salinity and temperature testing using durable Elite CTS pin-sensor pocket testers for a variety of applications including hydroponics, pools, spas and more!

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Specifications

Salinity Measurement Modes	Per practical salinity curve
Temperature Accuracy	±0.6°C, ±1.0°F for 0.0 to 50.0°C; ±1.1°C, ±1.9°F for 50.1 to 60.0°C
Resolution (Conductivity)	0.1 μS/cm for 0.0 to 200.0 μS/cm; 1 μS/cm for200 to 2000 μS/cm; 0.01 mS/cm for 2.00 to 20.00 mS/cm
Range (Conductivity)	0.00 to 20.00 mS/cm
Range (TDS)	0.00 to 10.00 ppt
Measurement Modes	Conductivity,TDS,Salinity,Temperature
Resolution (TDS)	0.1 ppm for 0.0 to 100.0 ppm; 1 ppm for 100 to 1000 ppm; 0.01 ppt for 0.10 to 10.00 ppt
TDS Factor Range	0.40 to 1.00 (selectable)
Relative Humidity Range	5 to 85 %, non-condensing
Range (Salinity)	0.00 to 10.00 ppt
Temperature Compensation	Yes
Accuracy (TDS)	± 1% full scale
Accuracy (Salinity)	± 1% full scale
Resolution (Salinity)	0.10 ppt
Accuracy (Conductivity)	± 1% full scale
Temperature Range (English)	32.0°F to 140.0°F
Temperature Probe Calibration	1 point
Temperature (Metric) Operating	5°C to 45°C (ambient)
Temperature Resolution	0.1°C, 0.1°F
Calibration Points (Conductivity)	1 to 3

Fisherbrand™ Traceable™ Conductivity Meter Pen

Easy-to-use, waterproof conductivity meter designed for routine analysis and quality control. Simply turn on, insert, and simultaneously read result and temperature.

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Fisherbrand™ Traceable™ Expanded Range Conductivity Meter

Ideal for checking the purity of water from stills, deionizers, and reverse osmosis, testing laboratory glassware rinsing, measuring total dissolved solids, and making solutions.

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Fisherbrand™ accumet™ Gel-Filled Polymer Body pH/ATC Double-Junction Combination Electrodes: Mercury-Free

Combine the convenience of a combination electrode with built-in ATC probe

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Specifications

Type	pH/ATC Combination Electrode
Length (Metric) Cable	0.10 m
Length (Metric)	106 mm
Temperature (English) Operating	23°F to 176°F
pH Range	0 to 14
Color	Purple
Length (English)	4 in.
Length (English) Cable	30 in.
Filling Solution Type	Gel
Material	Epoxy
Junction	Double
Temperature (Metric) Operating	-5°C to +80°C
Internal Reference	Ag/AgCl

Thermo Scientific™ Orion™ Versa Star Pro™ pH/LogR™ Benchtop Meter

Get premium performance and ultimate flexibility with our benchtop meter with pH/LogR module for pH, mV, ORP and LogR temperature technology.

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Specifications

Power Rating	DC input: 9VDC, 1A
Memory	Non-volatile memory preserves data log, calibration log and meter settings
Languages	English, Spanish, French, Italian, German, Chinese, Portuguese and Korean
Measurement Modes	pH with LogR Temperature,mV,Relative mV,ORP with Temperature
Range (pH)	-2 to 20
Channels	4 (Customizable with modules)
Accuracy (pH)	±0.002
Power Supply	Universal AC adapter (included)
Data Management Details	Transfer single, range or all data points to printer or computer
Display Type	LCD, Color Graphic with User-Customizable Options
Resolution (mV)	0.1mV
Data Points	2000 with Date and Time Stamp
Certifications/Compliance	CE, TUV 3-1, FCC Class A
Temperature Probe Calibration	1 point temperature offset calibration, 3 point LogR temperature calibration
Inputs	BNC (pH or ORP electrode), pin-tip (reference electrode), 8 pin MiniDIN (ATC temperature probe), two stirrer inputs (stirrer probe)
Accuracy (Temperature)	±0.1°C
Weight (Metric)	1.2 kg, modules add 0.2 kg each
Accuracy (mV)	±0.2 or ±0.05%, whichever is greater
Stability	Selectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting
Temperature (English) Operating	41°F to 113°F (ambient)
Isopotential Point	7.000pH (adjustable)
AC Adapter	Universal 50-60 Hz, 100-240 VAC power adapter (Cat. No. STARA-PWR)
Log Function Type	Automatic with Auto-Read, Timed, and Single-shot Measure Modes, Manual
Calibration	pH with calibration editing option, relative mV, ORP, LogR temperature and temperature
Relative Humidity Range	5 to 85%, non-condensing
Alarm Output	Set point alarm, high/low limit alarm, calibration due alarm
IP Rating	IP54
Temperature Selection	Manual or automatic with ATC temperature probe, automatic with pH electrode using LogR mode
Keypad	Numeric with menu-specific function keys and dual purpose scroll/shortcut keys
Outputs	USB, RS-232
Range (Relative mV)	±2000.0mV
Backlight Option	Yes
Temperature Range (English)	22.0°F to 221.0°F
Weight (English)	2.5 lb., modules add 0.5 lb. each
Resolution (Temperature)	0.1°C, 0.1°F
Temperature (Metric) Operating	5°C to 45°C (ambient)
Temperature Range (Metric)	-5°C to +105°C
Methods	10 per channel
Range (ORP)	±2000.0mV

Thermo Scientific™ Orion™ Versa Star Pro™ pH/ISE Benchtop Multiparameter Meter

Get premium performance and ultimate flexibility with our benchtop meter with pH/ISE module for pH, ion concentration, and temperature.

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Specifications

Power Rating	DC input: 9VDC, 1A
Memory	Non-volatile memory preserves data log, calibration log and meter settings
Advanced ISE Functions	Segmented (point-to-point) slope, non-linear selectable auto-blank, low concentration range stabilit
Languages	English, Spanish, French, Italian, German, Chinese, Portuguese and Korean
Measurement Modes	pH,mV,Relative mV,ORP,Ion Concentration (ISE) with Temperature
Range (pH)	-2 to 20
Resolution (ISE)	0.0001 minimum, 1 to 4 significant digits (user selectable)
Channels	4 (Customizable with modules)
Accuracy (pH)	±0.002
Range (ISE)	0.0001 to 19990 with selectable units of ppm, Molar, mg/L, %, ppb or none
Power Supply	Universal AC adapter (included)
Data Management Details	Transfer single, range or all data points to printer or computer
Display Type	Color graphic LCD with user-customizable options
Resolution (mV)	0.1mV
Data Points	2000 with Date and Time Stamp
Temperature Probe Calibration	1 point temperature offset calibration
Certifications/Compliance	CE, TUV 3-1, FCC Class A
Weight (Metric)	1.2 kg, modules add 0.2 kg each
Accuracy (mV)	±0.2 mV or ±0.05% of reading whichever is greater
Accuracy (ISE)	±0.2 mV or ±0.05% of reading whichever is greater
Warranty	3 year meter and module warranty
Temperature Accuracy	±0.1°C
Stability	Selectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting
Calibration Points (ISE)	1 to 6
Temperature (English) Operating	41°F to 113°F (ambient)
Isopotential Point	7.000pH (adjustable), 1.000 ISE (adjustable)
AC Adapter	Universal 50-60 Hz, 100-240 VAC power adapter (Cat. No. STARA-PWR)
Log Function Type	Automatic data logging with Auto-Read, Timed and Single Shot measure modes; manual data logging with
Calibration	pH with calibration editing option, ion concentration (ISE) with calibration editing option, relativ
Relative Humidity Range	5 to 85 %, non-condensing
Calibration Points	1 point relative mV (RmV) mode, 1 point ORP mode
Alarm Output	Set point alarm, high/low limit alarm, calibration due alarm
Dimensions (L x W x H)	28cm x 24cm x 10cm (11 in. x 9.5 in. x 3.9 in.), modules add ≤ 2cm (0.8 in.) L & H
Temperature Selection	Manual or automatic with ATC temperature probe
IP Rating	IP54
Keypad	Numeric with menu-specific function keys and dual purpose scroll/shortcut keys
Outputs	USB (2), RS232
Temperature Range (English)	22.0°F to 221.0° F
Range (Relative mV)	±2000.0 mV
Calibration Points (pH)	1 to 6
Backlight Option	Yes
Weight (English)	2.5 lb., modules add 0.5 lb. each
Temperature (Metric) Operating	5°C to 45°C (ambient)
Temperature Range (Metric)	-5.0°C to +105.0°C
Range (mV)	±2000.0 mV
Range (ORP)	±2000.0 mV
Methods	10 per channel
Temperature Resolution	0.1°C, 0.1°F

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Mettler Toledo™ FiveGo™ F2 pH/mV Meters

Portable meter provides reliable and high quality pH/mV measurements with simple click of a button

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Specifications

Accuracy (mV)	±1
Memory	200 measurements, current calibration
Log Function Type	Automatic, Manual
Measurement Modes	pH
Range (pH)	0 to 14
Calibration	Linear
Calibration Points	3
Temperature Compensation	ATC and MTC
Dimensions (L x W x H)	18.8 x 7.7 x 3.3 cm (97.4 x 3 x 1.3 in.)
Display Type	LCD
Model	F2
Resolution (mV)	1mV
Data Points	200
Backlight Option	None
Weight (English)	0.5 lb.
Resolution (Temperature)	0.1°
Temperature Range (Metric)	0°C to 100°C
Range (mV)	-1999 to 1999
Inputs	BNC, Cinch
Accuracy (Temperature)	±0.5°C
Weight (Metric)	0.26 kg

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Mettler Toledo™ pH/Conductivity Meter NineFocus™ NF2300™

High-performance, multiparameter benchtop meter for compelling precision in pH, conductivity, ion concentration, redox, and dissolved oxygen determinations. The modular meter is at its best with the smart digital InLab™ DES™ sensors.

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Specifications

Length (Metric)	40 cm
Memory	3000 Result Sets
Languages	Chinese Simplified, Chinese Traditional, English, French, German, Italian, Polish, Portuguese, Russian, Spanish, Thai, Turkish
Measurement Modes	pH with mV and Temperature,Conductivity,Dissolved Oxygen
Width (Metric)	30 cm
Channels	4 (Customizable with modules)
Accuracy (pH)	0.002
Accuracy	-30 to 130°C
Data Management Details	PC, Printer, USB stick
Display Type	Color TFT (7 in.)
Voltage	100/240 V
Accuracy (Conductivity)	0.5 %
Resolution (mV)	0.1,1
Data Points	2000
Calibration Modes	Calibration Support, Guided verification, Multilingual Menu, Simple Methods, Touch screen
Certifications/Compliance	CE, WEEE, RoHS
Weight (Metric)	2 kg
Height (Metric)	34 cm
Accuracy (mV)	0.1
Temperature Accuracy	±0.1°C between 0°C and 100°C
Resolution (Conductivity)	0.001 to 0.1
Range (Conductivity)	0.001 μS/cm to 2000 mS/cm
Log Function Type	Automatic by Interval or Event, Manual
Calibration	pH, ORP, Ion Concentration, Conductivity, TDS, Salinity, DO, Barometric Pressure, Temperature
Dimensions (L x W x H)	40 x 30 x 34 cm
Product Type	pH/Conductivity Meter
IP Rating	IP52
Range (Relative mV)	-2000 to 2000 mV
Backlight Option	Yes
Temperature Range (Metric)	-30°C to +130°C
Temperature Resolution	0.1°C

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Mettler Toledo™ FiveEasy™ F30 Conductivity Meters

Compact, benchtop meter provides high quality conductivity measurements with simple click of a button

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Specifications

Resolution (Conductivity)	Automatic range
Memory	Current calibration
Range (Conductivity)	0.01 μS/cm to 200 mS/cm
Range (TDS)	0 mg/L to 300 mg/L
Measurement Modes	Conductivity
Calibration	One point calibration with three predefined standards
Range (Salinity)	0 to 42 psu
Dimensions (L x W x H)	22.7 x 14.7 x 7 cm (9 x 5.7 x 2.7 in.)
Temperature Compensation	Linear: 0.00%/°C to 10.00%/°C, reference temperature: 20° and 25°C
Display Type	LCD
Voltage	100/240 V
Accuracy (Conductivity)	±0.5% of the measured value
Model	F30
Frequency	50/60Hz
Data Points	200
Temperature Range (English)	32°F to 212°F
Weight (English)	1.4 lb.
Resolution (Temperature)	0.1°C
Temperature Range (Metric)	-5°C to +105°C
Inputs	Mini-DIN
Accuracy (Temperature)	0.5°C
Weight (Metric)	0.63 kg

Thermo Scientific™ Orion Star T940 All-in-One Titrator and Kits

Benefit from the integration of our core electrochemistry technology with a state-of-the-art dispensing system to create an automated all-in-one titrator, a modern, simplified automated system designed to help make performing titrations easier, more reliable and more reproducible than manual titrations.

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Specifications

Titration Technique	Equivalence point or preset endpoint
Memory	Non-volatile memory preserves data logs and settings
Advanced ISE Functions	Multiple known addition (MKA); automated calibration and calculation of sample concentration by adding aliquots of standard to sample using the burette
Resolution (pH)	0.001, 0.01, 0.1 (user selectable)
Languages	Chinese, English, French, German, Italian, Japanese, Korean, Portuguese and Spanish
Resolution (ISE)	0.0001 minimum, 1 to 4 significant digits (user selectable)
Cycles Per Titration Run	1 to 5 cycles, option to exclude cycle results from average results and RSD calculations
Data Management Details	Data log export as CSV or PDF file, short or long format
Display Type	5.7 in. color capacitive touchscreen, 640 x 480 resolution
Functions Available	Sample titration, titrant standardization, calibration and direct measure
Resolution (mV)	0.1 mV
Data Points	100 data sets each: sample titration, titrant standardization, calibration and direct measure
Temperature Probe Calibration	Optional 1 point offset calibration
Certifications/Compliance	CE, TUV 3-in-1, FCC, EN/EIC61326-1, IEC 61010
Probe Type	pH electrode, redox electrode or ion selective electrode (ISE); reference half-cell electrode; ATC temperature probe; stirrer probe
Accuracy (mV)	±0.2 mV
Accuracy (ISE)	±0.2 mV or ±0.05% of reading, whichever is greater
Titrant Determination	Standardization titration or manual concentration input
Warranty	1 year replacement warranty
Calibration Points (ISE)	1 to 5
Relative Humidity Range	5 to 85%, non-condensing
Dimensions (L x W x H)	10 x 16 x 14 in. (25.4 x 40.6 x 35.6 cm)
Temperature Selection	Manual or automatic
Precision	0.5% RSD, dependent on environment and handling conditions
Outputs	3 USB ports for printer, USB flash drive and computer software connections
Calibration Points (pH)	1 to 5
Backlight Option	Yes, adjustable
Range (mV)	-2000.0 to +2000.0 mV
Methods	Up to 10 methods with optional password protection; import/export methods via USB flash drive
Resolution	Burette drive offers advanced micro-step technology that provides 25,600 micro-steps per motor revolution for smooth and precise burette positioning (over 2 million micro-steps over the full burette stroke range)
Titration Process Control	Routine, quick, careful or user defined
Time and Date	Yes, with nonvolatile battery backup
Updateable Firmware	Yes, using USB flash drive
Range (pH)	-2 to 20
For Use With (Application)	Acid-base titrations, redox titrations, ion concentration titrations
Titration Types	Direct or back titration
Channels	1
Accuracy (pH)	±0.002pH
Range (ISE)	0.0001 to 19990
Titration Setup Wizard	Yes, using Start a New Titration workflow
Stirrer Probe Speeds	5 user selectable speeds (250 to 3700 RPM)
Burette Sizes	10 mL, 20 mL (included) or 50 mL
Burette Functions	Automatic rinse cycles for flushing and discrete dispense volume with continuous option; Exceeds acc
Inputs	BNC (pH, redox or ion selective electrode), pin-tip (reference electrode), 8 pin MiniDIN (ATC temperature probe), stirrer input (stirrer probe)
Accuracy (Temperature)	±0.2 °C
Equivalence Points	1 to 2
Electrical Requirements	100-240V, 50/60 Hz
Temperature (English) Operating	41°F to 104°F
Preset Endpoints	1 to 3
Material	ABS Plastic
Calibration	pH, mV, ion concentration (ISE) and temperature
Calibration Points	1 point relative mV (RmV) mode
Alarm Output	Notifications for Titration Cycle Complete, Maximum Titrant Volume, Data Log Full, Calibration Due, Maintenance Reminder
IP Rating	IP51
Model	Orion Star T940
Sample ID	Auto-incremental, manual or off
Resolution (Temperature)	0.1 °C
Temperature Range (Metric)	-5.0°C to +100.0°C
Temperature (Metric) Operating	5°C to 40°C
Blank Options	Fixed value or variable value using titration

Fisherbrand™ accumet™ Metallic ORP Combination Electrode - Mercury - Free, Ag/AgCl Reference; BNC Connector

Platinum Pin Ag/AgCl Combination electrode for environmental ORP measurements

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Specifications

Temperature (Metric) Range	-5°C to +100°C
Filling Solution Type	SP135-500
Material	Glass
For Use With (Application)	Environmental ORP measurements
Temperature (Metric) Operating	-5°C to +100°C
Internal Reference	Ag/AgCl

Fisherbrand™ accumet™ Liquid-Filled Polymer Body Combination Electrodes: Mercury-Free

Ideal for measurements in small vessels or with small samples

Pricing & Availability
Specifications

Diameter (English)	0.4 in.
Type	Combination pH Electrode
Temperature (Metric) Range	-5°C to +100°C
Length (Metric)	106 mm
Temperature (English) Operating	23°F to 212°F
pH Range	0 to 14
Diameter (Metric)	10 mm
Length (English)	4.1 in.
Material	Polypropylene
For Use With (Application)	For measurements in small vessels or with small samples
Temperature (Metric) Operating	-5°C to +100°C
Internal Reference	Ag/AgCl

pH and Electrochemistry

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