pH and Electrochemistry
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.
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Jenway™ Glass Bodied Conductivity Probe
Used in conjunction with Jenway™ Conductivity meters - 4510, 4520 and 3540. Jenway™ Glass Bodied Conductivity Probes are designed for general purpose conductivity, pure water, and low conductivity solutions.
Type | Conductivity Cell |
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Temperature (Metric) Range | 0°C to 100°C |
Length (Metric) Cable | 1 m |
Length (Metric) | 120 mm |
For Use With (Equipment) | 4510, 4210, and 3540 Conductimeters |
Material | Glass Body, Platinum Plate |
Probe | Conductivity |
Diameter (Metric) Body | 12 mm |
Hanna Instruments™ Checker™ pH Tester and Replacement Part
For use with virtually any electrode that shares same connector.
METTLER TOLEDO™ InLab™ Routine pH Electrodes
A combination pH electrode with an integrated temperature sensor and chemically resistant HA glass body. It is designed for general lab applications and ideal for use at high pH values (IP67 rated).
Temperature (Metric) Range | 0°C to 100°C |
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pH Range | 0 to 14 |
Membrane | HA Glass |
Material | Glass |
Junction | Ceramic |
Temperature (Metric) Operating | 0°C to 100°C |
METTLER TOLEDO™ InLab™ Expert pH Electrodes
A combination pH electrode with PEEK plastic shaft for chemical and mechanical durability, and a fixed cable. Designed for use in a variety of applications.
Diameter (English) | 0.47 in. |
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Length (Metric) | 120 mm |
pH Range | 0 to 14 |
Diameter (Metric) | 12 mm |
Membrane | U Glass |
Filling Solution Type | Xerolyt Polymer |
Material | PEEK |
Temperature (Metric) Operating | 0°C to 100°C |
Internal Reference | ARGENTHAL |
Mettler Toledo™ Mettler Toledo™ Micro pH Electrode: LE422
Designed for measuring in small or narrow neck vessels or test tubes
Thermo Scientific™ Orion Star™ A211 Benchtop pH Meter
SureTRACE
Supports traceability with guaranteed access to certificates and proactive change notifications.
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Supports traceability with guaranteed access to certificates and proactive change notifications.
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Reliably measure pH, mV, ORP and temperature with our benchtop pH meter for advanced lab analysis and printer or computer interfacing.
Memory | Non-volatile memory preserves data log, calibration log and meter settings |
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Resolution (pH) | 0.001, 0.01, 0.1 |
Languages | English, Spanish, French, Italian, German and Chinese; Portuguese and Korean Available with Software Update |
Measurement Modes | pH,mV,Relative mV,ORP with Temperature |
Range (pH) | -2 to 20 |
Channels | 1 |
Accuracy (pH) | ±0.002 |
Power Supply | Universal AC adapter (included) or 4 AA batteries (sold separately) |
Battery Life | 800 hr. |
Data Management Details | Transfer single, range or all data points to printer or computer |
Display Type | LCD, Graphic with Backlight |
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 |
Inputs | BNC (pH or ORP electrode), pin-tip (reference electrode), 8 pin MiniDIN (ATC temperature probe), stirrer input (stirrer probe) |
Accuracy (Temperature) | ±0.1°C |
Weight (Metric) | 0.9 kg |
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 |
AC Adapter | Universal 50-60 Hz, 100-240 VAC power adapter (Cat. No. 1010003) |
Log Function Type | Automatic with Auto-Read and Timed Read Modes, Manual with Continuous Read Mode |
Calibration | pH with calibration editing option, relative mV, ORP and temperature |
Battery Type | 4 x AA (sold separately) |
Relative Humidity Range | 5 to 85%, non-condensing |
Calibration Points | 1 to 5 |
Alarm Output | High/low limit alarm, calibration due alarm |
IP Rating | IP-54 |
Temperature Selection | Manual or automatic with ATC temperature probe |
Keypad | Comprehensive with menu-specific function keys and dual purpose scroll/shortcut keys |
Model | Orion Star A211 pH/mV/RmV/ORP/Temperature Benchtop Meter |
Outputs | USB, RS-232 |
Range (Relative mV) | ±2000.0mV |
Backlight Option | Yes, selectable |
Temperature Range (English) | 22.0°F to 221.0°F |
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 |
Methods | 10 per channel with password protection |
Range (ORP) | ±2000.0mV |
Hanna Instruments™ Waterproof pH/Conductivity/TDS Tester
Makes measuring pH quick and easy. Hanna Instruments™ Waterproof pH/Conductivity/TDS Tester is lightweight and waterproof offering high accuracy pH, EC/TDS and temperature measurements in a single handheld unit.
Thermo Scientific™ Elite pH Pocket Testers and Replacement Sensors
Flexible on-the-go pH and temperature testing using durable Elite pocket testers with replaceable sensors for a variety of applications including environmental monitoring, pools, spas and more!
Thermo Scientific™ Orion™ Stainless-Steel Automatic Temperature Compensation (ATC) Probes
Automatically correct pH measurements for variation in electrode slope due to temperature change.
Temperature (English) Operating | 32°F to 212°F |
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For Use With (Equipment) | Standard pH Meter |
Storage Requirements | Store in air |
Temperature (Metric) Operating | 0°C to 100°C |
Eutech Expert CTS Pocket Tester
Ensure accurate measurements of Conductivity, TDS, Salinity, and Temperature using the easy-to-use, large 4-digit display pocket tester for many applications.
METTLER TOLEDO™ InLab™ Power pH Electrodes
A glass pH electrode with an integrated temperature sensor featuring the SteadyForce™ reference system, which is pressurized to prevent the junction from clogging.
Diameter (English) | 0.47 in. |
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Temperature (English) Operating | 32°F to 266°F |
pH Range | 0 to 12 |
Diameter (Metric) | 12 mm |
Membrane | A41 Glass |
Filling Solution Type | DPA Gel |
Material | Glass |
Junction | Ceramic |
Storage Requirements | 3 mol/L KCl |
Temperature (Metric) Operating | 0°C to 130°C |
Internal Reference | SteadyForce |
Brannan™ Soil Analysis pH Meter
Instantly tells you how acid or alkaline yo soil is and checks which plants suit.
Mettler Toledo™ FiveEasy™ F20 pH/mV Meters
Compact, benchtop meter provides high quality pH/mV measurements with simple click of a button
Accuracy (mV) | ±1 |
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Memory | Current calibration |
Resolution (pH) | 0.01 |
Range (pH) | 0 to 14 |
Calibration | Linear |
Accuracy (pH) | ±0.01 |
Temperature Compensation | ATC and MTC |
Dimensions (L x W x H) | 22.7 x 14.7 x 7 cm (9 x 5.7 x 2.7 in.) |
Display Type | LCD |
Voltage | 120/240 V |
Resolution (mV) | 1mV |
Frequency | 50/60 Hz |
Temperature Range (English) | 32°F to 212°F |
Weight (English) | 1.4 lb. |
Resolution (Temperature) | 0.1°C |
Temperature Range (Metric) | 0°C to 100°C |
Range (mV) | 2000 to 2000 |
Inputs | BNC, Cinch, NTC 30kiloOhm sensors |
Accuracy (Temperature) | 0.5°C |
Weight (Metric) | 0.63 kg |
Fisherbrand™ accumet™ AET15 pH Tester
Large display screen - dual display LCD for enhanced readability, provides comprehensive meter information
Thermo Scientific™ Orion™ Versa Star Pro™ pH/ISE/Conductivity/Dissolved Oxygen Multiparameter Benchtop Meter
SureTRACE
Supports traceability with guaranteed access to certificates and proactive change notifications.
Learn More
Supports traceability with guaranteed access to certificates and proactive change notifications.
Learn More
Get premium performance and flexibility with our multiparameter benchtop meter with pH/ISE, conductivity and RDO/DO modules to measure up to four channels at once.
Power Rating | DC input: 9VDC, 1A |
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Salinity Measurement Modes | Practical salinity (psu) or natural sea water (ppt) |
Resolution (Polarographic DO) | 0.01, 0.1mg/L |
Pressure Range | 400 to 850mmHg |
Range (Resistivity) | 2 ohm to 100.0 meg-ohm |
Memory | Non-volatile memory preserves data log, calibration log and meter settings |
Resolution (pH) | 0.1/0.01/0.001 |
Languages | English, Spanish, French, Italian, German, Chinese, Portuguese and Korean |
Measurement Modes | pH,mV,Relative mV,ORP,Ion Concentration (ISE) with Temperature,TDS,Conductivity,Salinity |
Resolution (ISE) | 0.0001 minimum, 1 to 4 significant digits (user selectable) |
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 |
Resolution (mV) | 0.1mV |
Data Points | 2000 with date and time stamp |
Calibration Modes | Water-saturated air, air-saturated water, manual (Winkler titration), zero point |
Temperature Probe Calibration | 1 point temperature offset calibration |
Certifications/Compliance | CE, TUV 3-1, FCC Class A |
Salinity Factor | 0.0 to 45.0 ppt, automatic correction using conductivity reading or manual entry of sample salinity |
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 |
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 |
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, Timed and Single Shot measure modes; manual data logging with |
Percent Saturation Range Polarographic DO | 0.0 to 600.0% saturation |
Relative Humidity Range | 5 to 85%, non-condensing |
Range (RDO) | 0.00 to 50.00mg/L |
Dimensions (L x W x H) | 28 x 24 x 10cm (11 x 9.5 x 3.9 in.), modules add ≤ 2cm (0.8 in.) L & H |
Accuracy (TDS) | 0.5% of reading ±1 digit |
Temperature Selection | Manual or automatic with ATC temperature probe |
Percent Saturation Range (RDO) | 0.0 to 500.0% saturation |
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 |
Percent Saturation Relative Accuracy (RDO) | ±2% saturation ≤ 200% saturation, ±10% saturation > 200% saturation |
Range (Polarographic DO) | 0.00 to 90.00mg/L |
Range (mV) | ±2000.0 mV |
Accuracy (Barometer) | ±6 mmHg |
Range (ORP) | ±2000.0 mV |
Pressure Resolution | 0.1mmHg |
Cell Constant | 0.001 to 199.9cm-1 |
Temperature (Metric) Reference | 5°, 10°, 15°, 20°, 25°C |
Range (pH) | -2.000 to 20.000 |
TDS Factor Range | Linear (0.02 to 9.99) |
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 |
Range (Salinity) | 0.06 to 80.00 psu, 0.05 to 42.00 ppt |
Resolution (RDO) | 0.01, 0.1mg/L |
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 |
Percent Saturation Resolution (RDO) | 0.1, 1% saturation |
Accuracy (Conductivity) | 0.5% of reading ±1 digit > 3 μS; 0.5% of reading ±0.01 μS ≤ 3 μS |
Weight (Metric) | 1.2 kg, modules add 0.2 kg each |
Calibration Points (Conductivity) | Up to 6 |
Temperature (English) Operating | 41°F to 113°F (ambient) |
Resolution (Resistivity) | 1 ohm or 0.1 meg-ohm, auto ranging |
Isopotential Point | 7.000pH (adjustable), 1.000 ISE (adjustable) |
Accuracy (Polarographic DO) | ±0.2 mg/L or ±2% of reading, whichever is greater |
Accuracy (Resistivity) | 0.5% of reading ±1 digit |
AC Adapter | Universal 50-60 Hz, 100-240 VAC power adapter (Cat. No. STARA-PWR) |
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, ion concentration (ISE) with calibration editing option, relativ |
Calibration Points | 1 point relative mV (RmV) mode, 1 point ORP mode |
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 |
Temperature (Metric) Operating | 5°C to 45°C (ambient) |
Temperature Range (Metric) | -5.0°C to +105.0°C |
Percent Saturation Range (Polarographic DO) | 0.0 to 600.0% saturation |
Temperature Resolution | 0.1°C, 0.1°F |
Accuracy (RDO) | ±0.1 mg/L up to 8 mg/L, ±0.2 mg/L from 8 to 20 mg/L, ±10% of reading up to 50 mg/L |