pH and Electrochemistry






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Fisherbrand™ accumet™ Basic AB315 Benchtop Laboratory pH/mV Meter
Ideal for daily pH testing of your routine laboratory samples, the accumet™ Basic AB315 Benchtop Meter provides essential functions needed for common pH measurements without complicated functions, all at a budget-friendly price.

Memory | Non-volatile |
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Resolution (pH) | 0.01, 0.1 |
Measurement Modes | pH with mV and Temperature,Relative mV with mV and Temperature |
Range (pH) | -2 to 18 |
Channels | 1 |
Accuracy (pH) | ±0.01 |
Temperature Compensation | Automatic, Manual |
Data Management Details | Printed or CSV Format |
Display Type | 5 in. LCD |
Voltage | 100/240 V |
Resolution (mV) | 1 mV, 0.1 RmV |
Data Points | 500 |
Inputs | BNC, ATC |
Accuracy (Temperature) | ±0.3°C (±0.5°F) |
Accuracy (mV) | ±0.2 or ±0.05%, Whichever is Greater |
Stability | Indicator Icons |
Warranty | 3 Years |
AC Adapter | Universal Power Adapter |
Log Function Type | Automatic, Manual |
Calibration | pH, Relative mV, Temperature |
Calibration Points | 1 to 5 (pH), 1 (Relative mV), 1 (Temperature) |
IP Rating | IP54 |
Model | AB315 |
Outputs | Port for Computer or Printer |
Frequency | 50/60 Hz |
Range (Relative mV) | ±2000 mV |
Backlight Option | Yes |
Temperature Range (English) | 23°F to 221°F |
Calibration Points (pH) | USA: 2, 4.01, 7, 10.01, 12; NIST: 1.68, 4.01, 6.87, 9.18, 12.46; DIN: 1.09, 3.06, 4.65, 6.79, 9.23, 12.75; FSCI: 1, 3, 6, 8, 10, 13 |
Resolution (Temperature) | 0.1°C (0.1°F) |
Temperature Range (Metric) | -5°C to +105°C |
Range (mV) | ±2000 mV |
Fisherbrand™ Traceable™ Conductivity/TDS Meter Pen
Easy-to-use, waterproof conductivity/TDS meter designed for routine analysis and quality control. Simply turn on, insert, and simultaneously read result and temperature.

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 |
Model | F20 |
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™ Traceable™ pH/ORP/Temperature Meter
Measure critical water quality parameters — without the need to carry multiple units.

Fisherbrand™ accumet™ AE series Double Junction Gel pH Electrode
Fisherbrand™ accumet™ AE series pH electrodes support the accumet™ AE150 pH meter for routine pH measurements at a budget-friendly price.

Thermo Scientific™ Orion™ Single Junction Epoxy Bodied pH/ATC Triode™
Accurately measure pH and temperature together in just one electrode, with a built-in temperature sensor.

Diameter (English) Body | 0.47 in. |
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Description | pH/ATC Triode |
Length (Metric) | 120 mm |
Temperature (English) Operating | 32°F to 176°F |
pH Range | 0 to 14 |
Length (English) | 4.7 in. |
Diameter (Metric) Cap | 16 mm |
Junction | Wick |
Material | Epoxy |
Diameter (Metric) Body | 12 mm |
For Use With (Application) | The Thermo Scientific Orion 9107BN Triode 3-in-1 pH/automatic temperature compensation probe has a low maintenance gel filled electrode with built-in ATC.For field or plant use. |
Temperature (Metric) Operating | 0°C to 80°C |
Reference Type | Ag/AgCl |
Thermo Scientific™ Orion Star™ A121 Portable pH Meter
Take simple pH and temperature measurements with our portable pH meter with easy operation for basic field testing.

Memory | Non-volatile memory preserves log and settings |
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Resolution (pH) | 0.01, 0.1 |
Languages | English |
Measurement Modes | pH,mV,Relative mV with Temperature |
Range (pH) | -2 to 16 |
Channels | 1 |
Accuracy (pH) | ±0.01 |
Power Supply | 4 AA batteries (included) or universal AC adapter (sold separately) |
Battery Life | 2000 hr. |
Data Management Details | Internal Data Point Memory |
Display Type | LCD |
Resolution (mV) | 0.1mV |
Data Points | 50 |
Certifications/Compliance | CE, TUV 3-1, FCC Class A |
Temperature Probe Calibration | 1 point temperature offset calibration |
Inputs | BNC (pH or ORP electrode), 8 pin MiniDIN (ATC temperature probe) |
Accuracy (Temperature) | ±0.1°C |
Weight (Metric) | 0.5 kg |
Accuracy (mV) | ±0.2 or ±0.05%, whichever is greater |
Stability | Smart Stability and Smart Averaging |
Warranty | 3 Year Meter Warranty |
Temperature (English) Operating | 41°F to 113°F (ambient) |
Isopotential Point | 7.00pH |
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 |
Calibration | pH, relative mV (RmV) and temperature |
Battery Type | 4 x AA |
Relative Humidity Range | 5 to 85%, non-condensing |
Calibration Points | 1 to 3 |
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.) |
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 A121 Portable pH/mV/RmV/Temperature Meter |
Outputs | None |
Range (Relative mV) | ±1999.9mV |
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 |
Range (mV) | ±1600.0 |
Fisherbrand™ accumet™ AB200 Benchtop pH/Conductivity Meters
Provides intuitive, simple operation and high accuracy measurements in a compact, affordable meter. Fisherbrand accumet AB200 pH/conductivity meter combines the benefits of a pH meter and conductivity meter in one easy to use, reliable measurement system. The large backlit display offers great visibility in laboratory environments.
Range (Resistivity) | 2 W to 20 MW |
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Resolution (pH) | 0.1/0.01/0.001 |
Cell Constant | 0.010 to 10.000 |
Range (pH) | -2 to 20 |
Accuracy (pH) | ±0.002 |
Range (Salinity) | 0 to 80 ppt |
Data Management Details | Manual, timed (selectable every 3 to 3600 sec.), printer or CSV format |
Display Type | LCD |
Accuracy (Salinity) | ± 1% full scale |
Resolution (Salinity) | 0.01/0.1ppm, 0.001/0.01/0.1ppt |
Voltage | 100/240 V |
Accuracy (Conductivity) | ±1% FS |
Resolution (mV) | 0.1mV |
Data Points | 500 |
Inputs | BNC, ATC |
Calibration Points (Conductivity) | Automatic (4 points), maximum 1/range, manual (5 points), maximum 1/range |
Accuracy (mV) | ±0.2 mV |
Warranty | 3 Years |
Temperature Accuracy | ±0.3°C |
Resolution (Resistivity) | 0.01/0.1W, 0.001/0.1kW, 0.01MW |
Resolution (Conductivity) | 0.01/0.1μS, 0.001/0.01/0.1mS |
Range (Conductivity) | 0 μS to 500 mS |
Accuracy (Resistivity) | ± 1% full scale |
Range (TDS) | 0 ppm to 500 ppt (at TDS factor 1) |
Resolution (TDS) | 0/0.1ppm, 001/01/0.1ppt |
Accuracy (TDS) | ± 1% full scale |
Outputs | RS232 (phono plug), mini-B USB, stirrer |
Frequency | 50/60Hz |
Calibration Points (pH) | Up to 6 preset or 5 custom |
Range (mV) | ±2000 mV |
Temperature Resolution | 0.1°C |
Fisherbrand™ Traceable™ Conductivity Meter Pen
Easy-to-use, waterproof conductivity meter designed for routine analysis and quality control. Simply turn on, insert, and simultaneously read result and temperature.

Fisherbrand™ accumet™ AB250 Benchtop pH/ISE Meters
Provides intuitive, simple operation and high accuracy measurements in a compact, affordable meter. Fisherbrand accumet AB250 pH/ISE meter provides flexible measurements of pH or ion concentration using an ion selective electrode (ISE) in one easy to use, reliable measurement system.

Accuracy (mV) | ±0.2 mV |
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Accuracy (ISE) | 0.5% full scale (monovalent ion), 1% full scale (divalent ion) |
Warranty | 3 Years |
Temperature Accuracy | ±0.3°C |
Calibration Points (ISE) | 2 to 6 points from one of following group, 0.001, 0.01, 0.1, 1, 10, 100, 0.01, 0.1, 1, 10, 100, 1000 |
Resolution (pH) | 0.1/0.01/0.001 |
Range (pH) | -2 to 20 |
Resolution (ISE) | 0.001/0.01/0.1/1 (automatic) |
Accuracy (pH) | ±0.002 |
Range (ISE) | 0.001 to 19999 (±2000) |
Data Management Details | Manual, timed (selectable every 3 to 3600 sec.), printer or CSV format |
Display Type | LCD |
Voltage | 100/240 V |
Resolution (mV) | 0.1mV |
Outputs | RS232 (phono plug), mini-B USB, stirrer |
Frequency | 50/60Hz |
Data Points | 500 |
Calibration Points (pH) | Up to 6 preset or 5 custom |
Range (mV) | ±2000 mV |
Inputs | BNC, ATC |
Temperature Resolution | 0.1°C |
METTLER TOLEDO™ InLab™ Conductivity Benchtop Probes

A selection of conductivity probes suitable for all applications.
Sensor Types | Integrated Temperature Sensor |
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For Use With (Application) | General conductivity measurements |
Connector Types | Mini-DIN |
Fisherbrand™ Traceable™ Expanded Range Conductivity Meter
Ideal for checking the purity of water from stills, deionizers, and reverse osmosis, testing laboratory glassware rinsing, measuring total dissolved solids, and making solutions.
