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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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™ 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 |
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™ 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.
Learn More
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 |
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!
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™ 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 |
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.
Fisherbrand™ accumet™ AET15 pH Tester
Large display screen - dual display LCD for enhanced readability, provides comprehensive meter information
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 |
Thermo Scientific™ Elite PCTS pH / Conductivity / TDS / Salinity Pocket Testers and Replacement Sensors
Flexible on-the-go pH, conductivity, TDS, salinity and temperature testing using durable Elite PCTS pocket testers for a variety of applications including agriculture, aquaculture, hydroponics and more!
Salinity Measurement Modes | Per practical salinity curve |
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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 |
Resolution (pH) | 0.01 |
Range (TDS) | 0.00 to 10.00 ppt |
Measurement Modes | pH,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 |
Range (pH) | -1.00 to 15.00 |
TDS Factor Range | 0.40 to 1.00 (selectable) |
Accuracy (pH) | ±0.02 |
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 |
Calibration Points (pH) | 1 to 3 |
Calibration Modes | pH, conductivity, TDS, salinity, temperature |
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 |
Thermo Scientific™ Orion Lab Star PH111 Bench pH Meters
Orion Lab Star PH111 benchtop pH meters measure pH or ORP with mV and temperature, feature a large backlit display for easy viewability, and offer small footprint to save bench space. The Orion Lab Star pH meter is ideal for simplified, budget-friendly lab testing and data recording.
Memory | Non-volatile |
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Resolution (pH) | 0.001, 0.01, 0.1 |
Measurement Modes | pH with mV and Temperature,ORP with mV and Temperature |
Data Management Details | Transfer single or all data points to printer or computer |
Display Type | LCD, 5 in. Backlit |
Resolution (mV) | 0.1 mV |
Data Points | 500 with Date and Time Stamp |
Certifications/Compliance | CE, TUV 3-1, FCC Class A |
Temperature Probe Calibration | 1 point temperature offset calibration |
Inputs | BNC for pH or ORP, 8-pin MiniDIN for ATC |
Accuracy (Temperature) | ±0.3°C/±0.5°F |
Weight (Metric) | 700 grams |
Accuracy (mV) | ±0.2 or ±0.05%, whichever is greater |
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 |
Log Function Type | Automatic with Auto-Read and Timed Read Modes, Manual with Continuous Read Mode |
Calibration | pH, ORP and temperature |
Calibration Points | 1 (ORP) |
Alarm Output | Calibration reminder alarm |
IP Rating | IP54 |
Temperature Selection | Manual or automatic with ATC temperature probe |
Outputs | Computer or printer (STARA-106) |
Backlight Option | Yes |
Temperature Range (English) | 23.0°F to 221.0°F |
Calibration Points (pH) | 1 to 5 points |
Weight (English) | 1.54 lb. |
Resolution (Temperature) | 0.1°C, 0.1°F |
Temperature Range (Metric) | -5.0°C to +105.0°C |
Range (mV) | ±2000.0 |
Range (ORP) | ±2000.0 mV with ±250 mV offset |