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 (3,075)

pH and Electrochemistry Meter Accessories (1,459)

pH Paper and other Test Strips (1,382)

Electrochemistry Meters (797)

pH Meters (533)

Benchtop Titrators (170)

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226 – 240 of 6,435 results

226

Thermo Scientific™ Orion Star T920 Redox Titrator and Kit

Benefit from the integration of our core electrochemistry technology with a state-of-the-art dispensing system to create an automated redox 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
Languages	Chinese, English, French, German, Italian, Japanese, Korean, Portuguese and Spanish
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	Redox/ORP electrode, reference half-cell electrode, ATC temperature probe, stirrer probe
Accuracy (mV)	±0.2 mV
Titrant Determination	Standardization titration or manual concentration input
Warranty	1 year replacement warranty
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
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
For Use With (Application)	Redox titrations including sulfite/SO2 and reducing sugar in juice and wine, ascorbic acid (vitamin C) and peroxide value in food products, dissolved oxygen in wastewater by Winkler titration and organic matter in soil
Titration Types	Direct or back titration
Channels	1
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 (redox/ORP 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	mV 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 T920
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

227

Thermo Scientific™ Orion Star T930 Ion Titrator and Kits

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
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	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
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
Titration Types	Direct or back titration
Channels	1
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 (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	Ion concentration (ISE) and temperature
Alarm Output	Notifications for Titration Cycle Complete, Maximum Titrant Volume, Data Log Full, Calibration Due, Maintenance Reminder
IP Rating	IP51
Model	Orion Star T930
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

228

Thermo Scientific™ Orion™ Single Junction Glass Bodied Combination Silver Billet Electrode

Receive an accurate determination of potentiometric halides with dual electrodes.

Pricing & Availability
Specifications

Length (Metric)	120 mm
For Use With (Equipment)	Orion instruments that perform potentiometric halide determinations
Material	Silver Billet
Temperature (Metric) Operating	0°C to 80°C
Diameter (Metric) Body	12 mm
Internal Reference	Ag/AgCl

229

Promotions Available

Mettler Toledo™ pH/Ion Meter NineFocus™ NF5000™

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

Pricing & Availability

230

Thermo Scientific™ Orion™ Surfactant Half Cell Ion Selective Electrode

Conduct end point detection in titrations of anionic or cationic surfactants in a solution with the Thermo Scientific™ Orion™ Surfactant Half-Cell.

Pricing & Availability

231

Thermo Scientific™ Orion Star T900 Series Titrator Accessories

Minimize maintenance downtime with easy to install Orion Star T900 series titrator replacement parts. Orion Star T900 series titrator accessories expand functionality.

Pricing & Availability
Specifications

For Use With (Equipment)	Orion Star T910 pH titrator, Orion Star T920 redox titrator, Orion Star T930 ion titrator, Orion Star T940 all-in-one titrator

232

Thermo Scientific™ Orion Star™ A223 Dissolved Oxygen Portable Meter

Reliably measure dissolved oxygen (optical/polarographic) and temperature with this RDO/DO portable meter for advanced field analysis.

Pricing & Availability
Specifications

Temperature (Metric) Range	0.0°C to 50.0°C
Resolution (Polarographic DO)	0.01, 0.1mg/L
Pressure Range	400 to 850mmHg
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	Dissolved Oxygen (% Saturation),Dissolved Oxygen (mg/L with Temperature and Barometric Pressure)
Power Supply	4 AA batteries (included) or universal AC adapter (sold separately)
Barometric Pressure Correction	400 to 850mmHg, automatic using built-in barometer or manual entry
Battery Life	800 hours
Data Management Details	Transfer single, range or all data points to printer or computer
Display Type	Graphic LCD with Backlight
Data Points	1000 with Date and Time Stamp
Calibration Modes	Water-saturated air, air-saturated water, manual (Winkler titration), zero point
Certifications/Compliance	CE, TUV 3-1, FCC Class A
Temperature Probe Calibration	1 point temperature offset calibration
Salinity Factor	0.0 to 45.0 ppt, automatic correction using manual entry of sample salinity
Stability	Smart Stability and Smart Averaging
Warranty	3 Year Meter Warranty
Sensor Types	RDO optical dissolved oxygen sensor or polarographic dissolved oxygen sensor
Percent Saturation Range Polarographic DO	0.0 to 600.0 % saturation
Log Function Type	Automatic with Auto-Read Measure Mode, Manual with Continuous Measure Mode
Battery Type	Four AA (included)
Relative Humidity Range	5 to 85 %, non-condensing
Range (RDO)	0.00 to 50.00 mg/L
Dimensions (L x W x H)	24 cm x 10 cm x 6.5 cm (9.5 in. x 3.9 in. x 2.6 in.)
Percent Saturation Range (RDO)	0.0 to 500.0 % saturation
Temperature Selection	Automatic with ATC temperature probe
Keypad	Comprehensive with menu-specific function keys and dual purpose scroll/shortcut keys
Outputs	USB, RS232
Backlight Option	Yes (Selectable)
Percent Saturation Relative Accuracy (RDO)	±2 % saturation ≤ 200 % saturation, ±10 % saturation > 200 % saturation
Range (Polarographic DO)	0.00 to 90.00 mg/L
Accuracy (Barometer)	±6mmHg
Methods	10 per channel with password protection
Pressure Resolution	1mmHg
Channels	1
Resolution (RDO)	0.01, 0.1mg/L
Percent Saturation Resolution (RDO)	0.1, 1 % saturation
Percent Saturation Relative Accuracy (Polarographic DO)	±2 % saturation or ±2% of reading whichever is greater
Inputs	9 pin MiniDIN (RDO optical or polarographic DO sensor with built-in temperature)
Accuracy (Temperature)	±0.1°C
Weight (Metric)	0.5 kg
Temperature (English) Operating	41°F to 113°F (ambient)
Accuracy (Polarographic DO)	±0.2mg/L or ±2% of reading, whichever is greater
AC Adapter	Universal 50-60 Hz, 100-240 VAC power adapter (sold separately, Cat. No. 1010003)
Alarm Output	Calibration due alarm (fixed 12 hour)
IP Rating	IP-67
Percent Saturation Resolution (Polarographic DO)	0.1, 1 % saturation
Model	Orion Star A223 RDO Optical/Dissolved Oxygen/Temperature Portable Meter
Weight (English)	1.2 lb.
Resolution (Temperature)	0.1°C (0.1°F)
Temperature (Metric) Operating	5°C to 45°C (ambient)
Percent Saturation Range (Polarographic DO)	0.0 to 600.0 % saturation
Accuracy (RDO)	±0.1mg/L up to 8mg/L, ±0.2mg/L from 8 to 20mg/L, ±10% of reading up to 50mg/L

233

Thermo Scientific™ Orion Star™ A324 pH/ISE Portable Multiparameter Meter

Accurately monitor pH, ion concentration, mV, ORP and temperature with our pH/ISE portable meter for challenging field testing.

Pricing & Availability
Specifications

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 and Chinese; Portuguese and Korean available with software update
Measurement Modes	pH,mV,Relative mV,ORP,Ion Concentration (ISE) with Temperature
Resolution (ISE)	0.0001 minimum, 1 to 3 significant digits (user selectable)
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
Accuracy (ISE)	±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
Calibration Points (ISE)	1 to 5
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.)
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
Range (pH)	-2 to 20
Channels	1
Accuracy (pH)	±0.002
Range (ISE)	0.0001 to 19900 with selectable units of ppm, Molar, mg/L, %, ppb or none
Inputs	BNC (pH, ORP or ion selective electrode), pin-tip (reference electrode), 8 pin MiniDIN (ATC temperature probe)
Weight (Metric)	0.5 kg
Temperature (English) Operating	41°F to 113°F (ambient)
Isopotential Point	7.000pH
AC Adapter	Universal 50-60 Hz, 100-240 VAC power adapter (sold separately, Cat. No. 1010003)
Calibration	pH with calibration editing option, ion concentration (ISE) with calibration editing option, relativ
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 A324 pH/ISE/mV/RmV/ORP/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

234

Thermo Scientific™ Orion Star™ A122 Conductivity Portable Meter

Take simple conductivity, TDS and temperature measurements with this conductivity portable meter with easy operation for basic field testing.

Pricing & Availability
Specifications

Memory	Non-volatile memory preserves log and settings
Languages	English
Cell Constant	0.001 to 10cm-1
Measurement Modes	Conductivity,TDS with Temperature
Temperature (Metric) Reference	20, 25°C
Channels	1
TDS Factor Range	Linear (0.02 to 9.99)
Power Supply	4 AA batteries (included) or universal AC adapter (sold separately)
Battery Life	2000 hr.
Data Management Details	Internal data point memory
Temperature Compensation	Linear
Display Type	LCD
Accuracy (Conductivity)	0.5% of reading ±1 digit
Data Points	50
Certifications/Compliance	CE, TUV 3-1, FCC Class A
Temperature Probe Calibration	1 point temperature offset calibration
Inputs	8 pin MiniDIN (conductivity sensor with built-in temperature)
Accuracy (Temperature)	±0.1°C
Weight (Metric)	0.5 kg
Calibration Points (Conductivity)	1
Stability	Smart Stability and Smart Averaging
Warranty	3 Year Meter
Temperature (English) Operating	41°F to 113°F (ambient)
Resolution (Conductivity)	0.01 μS minimum, auto ranging up to 3 significant digits
Range (Conductivity)	0.01 μS/cm to 200.0 mS/cm
AC Adapter	Universal 50-60 Hz, 100-240 VAC power adapter (sold separately, Cat. No. 1010003)
Log Function Type	Automatic with Auto-Read Measure Mode, Manual with Continuous Measure Mode
Range (TDS)	1 to 19,999 mg/L
Resolution (TDS)	1 mg/L
Calibration	Conductivity and temperature
Battery Type	4 x AA (included)
Relative Humidity Range	5 to 85%, non-condensing
Dimensions (L x W x H)	24 x 10 x 6.5 cm (9.5 x 3.9 x 2.6 in.)
Accuracy (TDS)	0.5% of reading ±1 digit
IP Rating	IP67
Temperature Selection	Manual or automatic with ATC temperature probe
Keypad	Simple with highlighted measure key, scroll and shortcut keys
Model	Orion Star A122 Conductivity/TDS/Temperature Portable Meter
Outputs	None
Weight (English)	2 lb.
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
Compatible Probes	2-cell or 4-cell conductivity sensors with built-in temperature

235

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

Perform precise pH determinations for routine or research work.

Pricing & Availability

236

Promotions Available

Thermo Scientific™ Orion™ Pro Star PH211 pH/ORP Bench Meter with Stand PROMO

Designed to provide accurate and reliable pH, ORP and temperature analysis, the Thermo Scientific™ Orion™ Pro Star PH211 bench meter is well suited for laboratories that desire a modern meter with advance performance.

Pricing & Availability

237

Promotions Available

METTLER TOLEDO™ EasyPlus Easy EPM Semi-Automated Titrator

Increase the repeatability of titration results with the controlled addition of titrant using the touchscreen or optional USB wheel. The automated burette precisely adds titrant allowing the operator to focus on the color change of samples.