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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346 – 360 of 6,332 results

346

OHAUS™ Starter Series Electrode: STSURF 2-in-1 Flat pH Electrode

Use in combination with Starter bench and portable meters. OHAUS Starter Series Electrode: STSURF 2-in-1 Flat pH Electrodes need to work with STTEMP30 temperature electrodes for 0.01 pH accuracy.

Pricing & Availability

347

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Mettler Toledo™ DO Meter NineFocus™ NF4000 Kit™

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

Pricing & Availability

348

OHAUS™ Starter Salinity Pen Meters

Simple salinity measurement. OHAUS Starter Salinity Pen Meters with combination of quality construction and sturdy design provide durable operation in tough environments.

Pricing & Availability
Specifications

Type	Salinity Pen Meter
Display Type	LCD
Weight (English)	0.23 lb.
Material	ABS
For Use With (Application)	Measuring salinity the dissolved salt content in a liquid medium
Battery Type	Micro Alkaline
Ambient Temperature (Metric)	0 to 50°C
Ambient Temperature (English)	32 to 122°F
Weight (Metric)	105 g
Resolution	0.1 ppt

349

Thermo Scientific™ Orion™ Pro Star DO213 Dissolved Oxygen Bench Meter

Designed to provide accurate and reliable dissolved oxygen, barometric pressure and temperature analysis, the Thermo Scientific™ Orion™ Pro Star DO213 bench meter is well suited for laboratories that desire a modern meter with advance performance.

Pricing & Availability
Specifications

Temperature (Metric) Range	-30.0°C to +130.0°C
Resolution (Polarographic DO)	0.1, 1% saturation; 0.01, 0.1 mg/L or ppm
Pressure Range	400.0 to 850.0 mmHg; 0.533 to 1.133 bar
Memory	Non-volatile
Languages	Chinese, English, French, German, Italian, Japanese, Korean, Portuguese, Spanish
Measurement Modes	Dissolved Oxygen (mg/L with Temperature and Barometric Pressure),Dissolved Oxygen (ppm with Temperature and Barometric Pressure),Dissolved Oxygen (% Saturation with Temperature and Barometric Pressure)
Channels	1
Barometric Pressure Correction	Yes, automatic with built-in barometer or manual
Resolution (RDO)	0.1, 1% saturation; 0.01, 0.1 mg/L or ppm
Display Type	7-in. High-resolution Color Graphic LCD
Percent Saturation Resolution (RDO)	0.1, 1% saturation
Resolution (DO)	0.1, 1% saturation; 0.01, 0.1 mg/L or ppm
Data Points	10,000 with Date and Time Stamp
Calibration Modes	Water-saturated air (100% and 0% saturation), air-saturated water (100% and 0% saturation) or custom concentration value (Winkler)
Percent Saturation Relative Accuracy (Polarographic DO)	±2% saturation
Certifications/Compliance	CE, TUV 3-1, FCC Class A
Temperature Probe Calibration	1 or 2 point temperature offset calibration
Probe Type	Polarographic or optical DO electrode
Inputs	9-pin MiniDIN for dissolved oxygen with ATC
Accuracy (Temperature)	±0.3°C, ±0.5°F
Weight (Metric)	1.00 kg
Salinity Factor	0.0 to 50.0 ppt
Accuracy (DO)	±2% saturation; ±0.02 mg/L or ppm
Warranty	2 year meter warranty
Accuracy (Polarographic DO)	±2% saturation; ±0.02 mg/L or ppm
AC Adapter	Universal 100-240 V 50/60 Hz power supply with wall plugs for US/Japan, Euro, UK/Singapore, Australia/New Zealand and China outlets
Log Function Type	Automatic with Auto-Read and Timed Read Modes, Manual with Continuous Read Mode
Relative Humidity Range	5 to 85%, non-condensing
Range (RDO)	0.0 to 600.0% saturation; 0.01 to 90.0 mg/L or ppm
Alarm Output	Calibration reminder alarm, high and low limit alarm per parameter
Dimensions (L x W x H)	218.9 x 153.2 x 91.33 mm; 8.62 x 6.03 x 3.60 in.
Percent Saturation Range (RDO)	0.0 to 600.0% saturation
IP Rating	IP54
Temperature Selection	Automatic with ATC temperature sensor, ambient or manual
Percent Saturation Resolution (Polarographic DO)	0.1, 1% saturation
Keypad	Capacitive touchscreen user interface
Model	DO213
Outputs	USB flash drive, computer or printer (STARA-106)
Backlight Option	Yes
Weight (English)	2.20 lbs.
Percent Saturation Relative Accuracy (RDO)	±2% saturation
Resolution (Temperature)	0.1°C, 0.1°F
Range (Polarographic DO)	0.0 to 600.0% saturation; 0.01 to 90.0 mg/L or ppm
Accuracy (Barometer)	±6.0 mmHg; ±0.008 bar
Range (DO)	0.0 to 600.0% saturation; 0.01 to 90.0 mg/L or ppm
Methods	10
Accuracy (RDO)	±2% saturation; ±0.02 mg/L or ppm

350

Thermo Scientific™ Orion™ Versa Star Pro™ DO Benchtop Meter

Get premium performance and flexibility with this benchtop meter with module for dissolved oxygen (optical/polarographic) and temperature.

Pricing & Availability
Specifications

Power Rating	DC input: 9VDC, 1A
Temperature (Metric) Range	-5.0°C to +105.0°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, Chinese, Portuguese and Korean
Measurement Modes	Dissolved Oxygen (% Saturation),Dissolved Oxygen (mg/L with Temperature and Barometric Pressure)
Power Supply	Universal AC adapter (included)
Barometric Pressure Correction	400 to 850mmHg, automatic using built-in barometer or manual entry
Data Management Details	Transfer single, range or all data points to printer or computer
Display Type	Color graphic LCD with user-customizable options
Data Points	2000 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	Selectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting
Warranty	3 year meter and module warranty
Sensor Types	RDO optical dissolved oxygen sensor or polarographic dissolved oxygen sensor
Log Function Type	Automatic data logging with Auto-Read, Timed and Single Shot measure modes; manual data logging with
Relative Humidity Range	5 to 85 %, non-condensing
Range (RDO)	0.00 to 50.00 mg/L
Dimensions (L x W x H)	28 cm x 24 cm x 10 cm (11 in. x 9.5 in. x 3.9 in.), modules add ≤ 2 cm (0.8 in.) L & H
Percent Saturation Range (RDO)	0.0 to 500.0 % saturation
Temperature Selection	Automatic with ATC temperature probe
Keypad	Numeric with menu-specific function keys and dual purpose scroll/shortcut keys
Outputs	USB (2), RS232
Backlight Option	Yes
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
Pressure Resolution	0.1mmHg
Channels	4 (Customizable with modules)
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), two stirrer inputs (stirrer probe)
Accuracy (Temperature)	±0.1°C
Weight (Metric)	1.2 kg, modules add 0.2 kg each
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 (Cat. No. STARA-PWR)
Alarm Output	Set point alarm, high/low limit alarm, calibration due alarm
IP Rating	IP-54
Percent Saturation Resolution (Polarographic DO)	0.1, 1 % saturation
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)
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

351

Thermo Scientific™ Orion Star™ A323 Dissolved Oxygen Portable Meter

Accurately monitor dissolved oxygen (optical/polarographic) and temperature with this RDO/DO portable meter for challenging field testing.

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	5000 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	Selectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting
Warranty	3 Year Meter Warranty
Sensor Types	RDO optical dissolved oxygen sensor or polarographic dissolved oxygen sensor
Log Function Type	Automatic data logging with Auto-Read and Timed measure modes; manual data logging with Continuous m
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	High/low limit alarm, calibration due alarm
IP Rating	IP-67
Percent Saturation Resolution (Polarographic DO)	0.1, 1 % saturation
Model	Orion Star A323 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

352

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Mettler Toledo™ FiveGo™ F4 DO Meters

Portable meter provides reliable and high quality dissolved oxygen (DO) measurements with simple click of a button

Pricing & Availability
Specifications

Range (RDO)	0 to 45 mg/L
Type	Dissolved Oxygen Portable Meter
Temperature (Metric) Range	0°C to 50°C
IP Rating	IP67
Memory	200 measurements
Model	DO PORTABLE F4
Sensor Types	Dissolved Oxygen Sensor
Percent Saturation Range Polarographic DO	0 to 400%
Languages	Chinese, Chinese (TW), Croatian, Czech, Danish, Dutch, English (GB), English (US), French, German, Hungarian, Indonesian, Italian, Japanese, Korean, Norwegian, Polish, Portuguese (BR), Russian, Slovak, Slovenian, Spanish, Swedish, Thai, Turkish, Vietnamese
Measurement Modes	Dissolved Oxygen
Range (Polarographic DO)	0 to 45 mg/L
Channels	1
Relative Humidity Range	5 to 85%

353

Thermo Scientific™ Orion Lab Star DO Dissolved Oxygen Bench Meters

Orion Lab Star DO113 dissolved oxygen bench meters measure DO as % saturation or concentration with temperature, feature large backlit display for easy viewability, and offer small footprint to save bench space. This DO meter is ideal for simplified, budget-friendly lab testing and data recording.

Pricing & Availability
Specifications

Temperature (Metric) Range	-5.0°C to +105.0°C
Resolution (Polarographic DO)	0.1, 1 % saturation; 0.01, 0.1 mg/L or ppm
Pressure Range	400.0 to 850.0 mmHg; 0.533 to 1.133 bar
Memory	Non-volatile
Measurement Modes	Dissolved Oxygen (% Saturation with Temperature),Dissolved Oxygen (mg/L with Temperature),Dissolved Oxygen (ppm with Temperature)
Data Management Details	Continuous, Auto-Read and Timed read modes
Display Type	5 in. backlit LCD
Data Points	500 Sets with Date and Time Stamp
Calibration Modes	100 % saturation, 0 % saturation, custom concentration value
Certifications/Compliance	CE, TUV 3-1, FCC Class A
Temperature Probe Calibration	1 point temperature offset calibration
Accuracy (Temperature)	±0.3°C, ±0.5°F
Weight (Metric)	700 grams
Warranty	3 year meter warranty
AC Adapter	Universal 100-240 V 50/60 Hz power supply with twist-and-lock meter connection and interchangeable wall plugs for US/Japan, Euro, UK/Singapore, Australia/New Zealand and China outlets
Sensor Types	Polarographic
Log Function Type	Automatic with Auto-Read and Timed Read Modes, Manual with Continuous Read Mode
Relative Humidity Range	5 to 85%, non-condensing
Alarm Output	Calibration reminder alarm
Dimensions (L x W x H)	187.2 x 155.2 x 61.7 mm, 7.37 x 6.11 x 2.43 in.
IP Rating	IP54
Temperature Selection	Manual or automatic with ATC temperature probe
Outputs	Computer or printer (STARA-106)
Backlight Option	Yes
Weight (English)	1.54 lb.
Resolution (Temperature)	0.1°C, 0.1°F
Range (Polarographic DO)	0.0 to 300.0 % saturation; 0.00 to 30.0 mg/L or ppm

354

Thermo Scientific™ Orion™ ROSS™ PerpHecT™ Micro Glass Bodied Combination pH Electrode

Measure small volumes down to 15 μL in 384 well plates with micro pH electrodes.

Pricing & Availability

355

OHAUS™ Starter Series Electrodes: Micro pH Electrodes

Use in combination with Starter bench and portable meters. OHAUS Starter Series Electrodes: Micro pH Electrodes can be used for testing samples in a tube, where diameter of the electrode should be smaller than the tube.

Pricing & Availability
Specifications

Type	Combination pH Micro Electrode
pH Range	0 to 14
Material	Glass
Junction	Ceramic
Temperature (Metric) Operating	0°C to 100°C
Connector Types	BNC/Cinch

356

Thermo Scientific™ Orion™ Redox/ORP/Temp Electrodes

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

Pricing & Availability
Specifications

Material	Epoxy

357

Mettler Toledo™ perfectION™ Gas-Sensing Combination Electrodes

Allows quick and easy determination of concentration and activity of dissolved gases. Mettler Toledo perfectION Gas-Sensing Combination Electrodes are resistant to any known organic chemical present whose temperature is less than 392°F (200°C).

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358

Mettler Toledo™ SevenGo™ perfectION Combined ISE Electrodes

Get an All-In-One Solution with SevenGo™ perfectION Combined ISE Electrodes. The brilliant Click & Clear™ press mechanism allows for quick cleaning and ensures stable readings even in difficult samples.

Pricing & Availability
Specifications

Type	Combination ISE
Electrode	Combined ISE Electrode
For Use With (Equipment)	All pH, mV Meters or Ionometers
Material	Epoxy
Filling Solution Type	ISA
Connector Types	Lemo