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 (2,990)

pH and Electrochemistry Meter Accessories (1,435)

pH Paper and other Test Strips (1,395)

Electrochemistry Meters (788)

pH Meters (521)

Benchtop Titrators (165)

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196 – 210 of 6,332 results

196

OHAUS™ Aquasearcher™ pH Meter AB41PH

The Aquasearcher™ pH Meter AB41PH is an advanced, research-grade benchtop pH meter with electrode, offering accurate, repeatable results with selectable resolution and an intelligent i-Steward system.

Pricing & Availability
Specifications

Accuracy (mV)	±0.3
Log Function Type	1000 Measurement, 10 Calibration
Measurement Modes	Auto-stop,Timed,Continuous
Range (pH)	-2 to 20
Calibration	Offset
Accuracy (pH)	±0.002
Calibration Points	Up to 5
Data Management Details	Datalog with Time and Date Stamp
Display Type	LCD, 6.5 in. Segment and Dot Matrix
Outputs	USB, RS-232 (PC), RS-232 (Printer)
Data Points	1000 Sets
Backlight Option	LCD
Temperature Range (Metric)	-10°C to +125°C
Range (mV)	±2000.0
Accuracy (Temperature)	±0.3°C

197

Thermo Scientific™ Orion™ ROSS Ultra™ Flat Surface Refillable Epoxy Bodied Combination pH Electrode

Measure flat, soft, moist, semi-solid or small volume samples with epoxy body flat surface pH electrodes.

Pricing & Availability

198

Mettler Toledo™ DX Series ISE Half-Cell Membrane Kit: DX218-NH^-4+

For Ammonium ISE.

Pricing & Availability

199

METTLER TOLEDO™ InLab™ Versatile pH Electrode Replaceable Ceramic Junctions

Set of 10 ceramic junctions.

Pricing & Availability

200

OHAUS™ Starter Water Analysis Portable pH Meters

LCD meters combine portability with precise pH measurement.

Pricing & Availability
Specifications

Width (English)	3.5 in.
Measurement Modes	pH with mV and Temperature
Range (pH)	0 to 14
Width (Metric)	9 cm
Accuracy (pH)	±0.01
Battery Life	>500 hr.
Data Management Details	30 Sets, most recent calibration data
Display Type	LCD
Resolution (mV)	1 mV
Data Points	30
Inputs	BNC, NTC
Accuracy (Temperature)	±0.5°C
Height (English)	1.3 in.
Weight (Metric)	0.18 kg
Height (Metric)	3.5 cm
Accuracy (mV)	±1
Log Function Type	Automatic Data Logging
Material	ABS
Calibration	Automatic/Manual
Battery Type	AAA
Calibration Points	1 to 3
Type	Portable pH Meters
IP Rating	IP54
Depth (Metric)	17 cm
Backlight Option	None
Resolution (Temperature)	0.1°C
Temperature Range (Metric)	0°C to 100°C
Range (mV)	-1999 to 1999
Resolution	0.01 pH; 1 mV; 0.1°C

201

Thermo Scientific™ Orion™ Single Junction Refillable Epoxy Bodied pH/ATC Triode™

Accurately measure pH and temperature together in just one electrode, with a built-in temperature sensor.

Pricing & Availability
Specifications

Diameter (English) Body	0.47 in.
Length (Metric)	120 mm
Temperature (English) Operating	32°F to 194°F
For Use With (Equipment)	Orion Star Series Meters
pH Range	0 to 14
Diameter (Metric) Cap	16 mm
Length (English)	4.7 in.
Material	Epoxy
Junction	Glass Fiber
Diameter (Metric) Body	12 mm
For Use With (Application)	ideal for field or plant use.
Temperature (Metric) Operating	0°C to 90°C
Internal Reference	Ag/AgCl

202

Thermo Scientific™ Orion™ ROSS Ultra™ Glass Bodied Reference Electrode

Perform precise pH determinations for routine or research work.

Pricing & Availability

203

Mettler Toledo™ Easy Na Sodium Analyzer: DX222-Na Sodium Half-Cell Electrode

For use with Easy Na Sodium Analyzer.

Pricing & Availability

204

Thermo Scientific™ Orion™ ROSS Ultra™ Glass Bodied pH/ATC Triode™

Accurately measure pH and temperature together in just one electrode, with a built-in temperature sensor.

Pricing & Availability
Specifications

Warranty	2 Years
Length (Metric) Cable	1 m
Length (Metric)	120 mm
Isopotential Point	7
pH Range	0 to 14
Material	Chemical Resistant Glass Body
Type	pH/ATC Combination Electrode
Precision	0.01
Diameter (Metric)	12 mm
Filling Solution Type	ROSS electrode 3 M KCl fill solution (Cat. No. 810007)
Junction	Ceramic
pH Relative Accuracy	0.03 pH for buffers using automatic temperature compensation
Temperature (Metric) Operating	0°C to 100°C
Internal Reference	ROSS

205

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.

Pricing & Availability
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

206

Thermo Scientific™ Orion™ Single Junction Thin Stem Glass Bodied Combination pH Electrode

Top-performance, semi-micro pH electrodes to measure samples as small as 0.2 mL

Pricing & Availability
Specifications

Temperature (English) Operating	32°F to 194°F
Precision	0.02
pH Range	0 to 14
Diameter (Metric) Cap	16 mm
Filling Solution Type	4M KCl with Ag/AgCl
Material	Glass Body
Junction	Ceramic
Temperature (Metric) Operating	0°C to 90°C
Internal Reference	Ag/AgCl

207

Thermo Scientific™ Orion™ Sure-Flow™ Double Junction Epoxy Bodied Reference Electrode

Attain stable, drift-free reference measurements using a sure-flow electrode with its unique free-flowing liquid-to-liquid junction.

Pricing & Availability

208

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METTLER TOLEDO™ SevenGo Duo pH/Ion/DO Meter SG98-EL-Kit

A high precision dual-channel pH/ optical DO meter for simultaneous analysis of two electrochemical parameters. Easy text guided operation.

Pricing & Availability

209

Thermo Scientific™ Orion Star™ A325 pH/Conductivity Portable Multiparameter Meter

Accurately measure pH, conductivity and temperature with our pH/conductivity portable meter for high performance in challenging field tests.

Pricing & Availability
Specifications

Salinity Measurement Modes	Practical salinity (psu) or natural sea water (ppt)
Range (Resistivity)	2 ohm to 100.0 meg-ohm
Memory	Non-volatile memory preserves data log, calibration log and meter settings
Languages	English, Spanish, French, Italian, German and Chinese; Portuguese and Korean available with software update
Measurement Modes	pH,mV,Relative mV,TDS,ORP with Temperature,Salinity,Conductivity,Resistivity with Temperature
Power Supply	4 AA batteries (included) or universal AC adapter (sold separately)
Data Management Details	Transfer single, range or all data points to printer or computer
Battery Life	800 hr.
Display Type	LCD Graphic, Backlit
Resolution (mV)	0.1mV
Data Points	5000 with Date and Time Stamp
Temperature Probe Calibration	1 point temperature offset calibration
Certifications/Compliance	CE, TUV 3-1, FCC Class A
Accuracy (mV)	±0.2 mV or ±0.05% of reading whichever is greater
Warranty	3 Year Meter
Temperature Accuracy	±0.1°C
Stability	Selectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting
Resolution (Conductivity)	0.001 μS minimum, auto ranging up to 4 significant digits
Range (Conductivity)	0.001 μS/cm to 3000 mS/cm
Log Function Type	Automatic data logging with Auto-Read and Timed measure modes; manual data logging with Continuous m
Battery Type	4 AA (included)
Relative Humidity Range	5 to 85 %, non-condensing
Dimensions (L x W x H)	24cm x 10cm x 6.5cm (9.5 in. x 3.9 in. x 2.6 in.)
Accuracy (TDS)	0.5% of reading ±1 digit
Temperature Selection	Manual or automatic with ATC temperature probe
Keypad	Comprehensive with menu-specific function keys and dual purpose scroll/shortcut keys
Outputs	USB, RS232
Temperature Range (English)	22.0°F to 221.0° F
Range (Relative mV)	±2000.0 mV
Calibration Points (pH)	1 to 5
Backlight Option	Yes (Selectable)
Range (mV)	±2000.0 mV
Range (ORP)	±2000.0 mV
Methods	10 per channel with password protection
Cell Constant	0.001 to 199.9cm-1
Temperature (Metric) Reference	5, 10, 15, 20, 25°C
Range (pH)	-2 to 20
TDS Factor Range	Linear (0.02 to 9.99)
Channels	2
Accuracy (pH)	±0.002
Range (Salinity)	0.06 to 80.00 psu, 0.05 to 42.00 ppt
Temperature Compensation	Linear, nLFn (non-linear ultra pure water), nLFu (non-linear ultra pure degassed water), EP (off with warning) or off
Accuracy (Salinity)	0.5% of reading ±1 digit
Resolution (Salinity)	0.01 psu or 0.01 ppt minimum, auto ranging
Accuracy (Conductivity)	0.5% of reading ±1 digit > 3 μS; 0.5% of reading ±0.01 μS ≤ 3 μS
Inputs	BNC (pH or ORP electrode), pin-tip (reference electrode), 8 pin MiniDIN (conductivity sensor with built-in temperature or ATC temperature probe)
Weight (Metric)	0.5 kg
Calibration Points (Conductivity)	Up to 5
Temperature (English) Operating	41°F to 113°F (ambient)
Resolution (Resistivity)	1 ohm or 0.1 meg-ohm, auto ranging
Isopotential Point	7.000pH
Accuracy (Resistivity)	0.5% of reading ±1 digit
AC Adapter	Universal 50-60 Hz, 100-240 VAC power adapter (sold separately, Cat. No. 1010003)
Range (TDS)	0.001 ppm to 200.0 ppt
Resolution (TDS)	0.001 ppm minimum, auto ranging up to 4 significant digits
Calibration	pH with calibration editing option, relative mV (RmV), ORP, conductivity with calibration editing op
Calibration Points	1 point relative mV (RmV) mode, 1 point ORP mode
Alarm Output	High/low limit alarm, calibration due alarm
IP Rating	IP67
Model	Orion Star A325 pH/mV/RmV/ORP/Conductivity/TDS/Salinity/Resistivity/Temperature Portable Meter
Weight (English)	1.2 lb.
Temperature (Metric) Operating	5°C to 45°C (ambient)
Temperature Range (Metric)	-5.0°C to +105.0°C
Temperature Resolution	0.1°C, 0.1°F

210

Thermo Scientific™ Orion™ Combination pH Electrodes

Environmentally friendly lab pH electrodes to meet RoHS requirements by containing no lead, mercury or other hazardous substances — making disposal of old electrodes easy and hassle free.

Pricing & Availability
Specifications

Length (Metric) Cable	1 m
For Use With (Equipment)	Standard pH Meter
pH Range	0 to 14
Length (English) Cable	39.3 in.
Material	Epoxy Body
Temperature (Metric) Operating	0°C to 90°C

pH and Electrochemistry

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