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pH Meters

Instruments used to measure the acidity and alkalinity of water, other liquids, and solutions; the difference in voltage between pH-sensitive glass electrodes and reference electrodes is converted into pH units based on the Nernst equation.
Portable pH Meters (344)
Benchtop pH Meters (180)

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16
Promotions Available

Mettler Toledo™ pH Meter SevenDirect SD20
GREENER_CHOICE

The SevenDirect SD20 is an accurate and flexible benchtop meter for the determination of pH and ORP. The instrument is the replacement of the SevenCompact and is delivered with an EasyPlace sensor arm.

Memory 2000 Standard Measurements
Log Function Type Automatic, Manual
Range (pH) -2 to 20
Accuracy (pH) 0.002
Calibration Points Up to 5
Dimensions (L x W x H) 195 x 205 x 65 mm
Data Management Details PC, Printer, USB Stick
Display Type Color TFT
IP Rating IP54
Data Points 2000
Backlight Option Yes
Temperature Range (English) -22°F to +266°F
Weight (English) 1.9 lb.
Resolution (Temperature) 0.1°C
Temperature Range (Metric) -30°C to +130°C
Range (mV) -2000 to 2000 mV
Accuracy (Temperature) ±0.1°C between 0°C and 100°C
Weight (Metric) 850 g
17

OHAUS™ Starter pH Pen Meters

Convenient pH testing. OHAUS Starter pH Pen Meters offer a convenient way to measure pH, or the relative acidity or alkalinity of a sample at a given temperature. The pH pen meters can be completely operated with just one hand, freeing up your other hand to handle samples.

Calibration Points 3
Includes 4 1.5V Batteries
Type Portable pH Meter
Log Function Type Automatic Data Logging
Data Points 30
Backlight Option None
Weight (English) 0.24 lb.
Range (pH) 0 to 14
Calibration Automatic/Manual
For Use With (Application) Measuring pH, or the relative acidity or alkalinity of a sample at a given temperature
Battery Type 4 x AG13 1.5 V Micro Alkaline
Accuracy (pH) ±0.1
Weight (Metric) 110 g
18
Promotions Available

Mettler Toledo™ pH Meter NineFocus™ NF2000™

High-performance, multiparameter benchtop meter for compelling precision in pH, conductivity, ion concentration, redox, and dissolved oxygen determinations. The modular meter is at its best with the smart digital InLab™ DES™ sensors.

Temperature Range (Metric) -30°C to +130°C
19

Oakton™ Waterproof Big Display pHTestr™ 30

Versatile, compact design works in a field or laboratory setting.

EDGE
Diameter (English) 1.5 in.
Warranty 1 Year
Length (Metric) 16.5 cm
Temperature (English) Operating 32.0°F to 122.0°F
Detection Range -1 to 15 pH
Measurement Modes pH
Range (pH) -1 to 15
Calibration Automatic
For Use With (Application) Hold function, auto-off, error messages, waterproof, dustproof and floatable
Accuracy (pH) ±0.01
Calibration Points 1 to 3
Accuracy ±0.1 pH
Display Type LCD
IP Rating IP66/67
Diameter (Metric) 3.8 cm
Backlight Option None
Certifications/Compliance NIST
Resolution (Temperature) 0.1°C
Temperature (Metric) Operating 0°C to 50°C
Accuracy (Temperature) ±1°C
Resolution 0.1pH
20
Promotions Available

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

Get premium performance and ultimate flexibility with our benchtop pH meter for pH, mV, ORP and temperature measurements on customizable color display.

Power Rating DC input: 9VDC, 1A
Memory Non-volatile memory preserves data log, calibration log and meter settings
Languages English, Spanish, French, Italian, German, Chinese, Portuguese and Korean
Measurement Modes pH,mV,Relative mV,ORP with Temperature
Range (pH) -2 to 20
Channels 4 (Customizable with modules)
Accuracy (pH) ±0.002
Power Supply Universal AC adapter (included)
Data Management Details Transfer single, range or all data points to printer or computer
Display Type LCD, Color Graphic with User-Customizable Options
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), two stirrer inputs (stirrer probe)
Accuracy (Temperature) ±0.1°C
Weight (Metric) 1.2 kg, modules add 0.2 kg each
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 (adjustable)
AC Adapter Universal 50-60 Hz, 100-240 VAC power adapter (Cat. No. STARA-PWR)
Log Function Type Automatic with Auto-Read, Timed, and Single-shot Measure Modes, Manual
Calibration pH with calibration editing option, relative mV, ORP and temperature
Relative Humidity Range 5 to 85%, non-condensing
Calibration Points 1 to 6
Alarm Output Set point alarm, high/low limit alarm, calibration due alarm
IP Rating IP54
Temperature Selection Manual or automatic with ATC temperature probe
Keypad Numeric with menu-specific function keys and dual purpose scroll/shortcut keys
Outputs USB, RS-232
Range (Relative mV) ±2000.0mV
Backlight Option Yes
Temperature Range (English) 22.0°F to 221.0°F
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)
Temperature Range (Metric) -5°C to +105°C
Methods 10 per channel
Range (ORP) ±2000.0mV
21

Thermo Scientific™ Orion™ Versa Star Pro™ pH/LogR™ Benchtop Meter

Get premium performance and ultimate flexibility with our benchtop meter with pH/LogR module for pH, mV, ORP and LogR temperature technology.

Power Rating DC input: 9VDC, 1A
Memory Non-volatile memory preserves data log, calibration log and meter settings
Languages English, Spanish, French, Italian, German, Chinese, Portuguese and Korean
Measurement Modes pH with LogR Temperature,mV,Relative mV,ORP with Temperature
Range (pH) -2 to 20
Channels 4 (Customizable with modules)
Accuracy (pH) ±0.002
Power Supply Universal AC adapter (included)
Data Management Details Transfer single, range or all data points to printer or computer
Display Type LCD, Color Graphic with User-Customizable Options
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, 3 point LogR temperature calibration
Inputs BNC (pH or ORP electrode), pin-tip (reference electrode), 8 pin MiniDIN (ATC temperature probe), two stirrer inputs (stirrer probe)
Accuracy (Temperature) ±0.1°C
Weight (Metric) 1.2 kg, modules add 0.2 kg each
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 (adjustable)
AC Adapter Universal 50-60 Hz, 100-240 VAC power adapter (Cat. No. STARA-PWR)
Log Function Type Automatic with Auto-Read, Timed, and Single-shot Measure Modes, Manual
Calibration pH with calibration editing option, relative mV, ORP, LogR temperature and temperature
Relative Humidity Range 5 to 85%, non-condensing
Alarm Output Set point alarm, high/low limit alarm, calibration due alarm
IP Rating IP54
Temperature Selection Manual or automatic with ATC temperature probe, automatic with pH electrode using LogR mode
Keypad Numeric with menu-specific function keys and dual purpose scroll/shortcut keys
Outputs USB, RS-232
Range (Relative mV) ±2000.0mV
Backlight Option Yes
Temperature Range (English) 22.0°F to 221.0°F
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)
Temperature Range (Metric) -5°C to +105°C
Methods 10 per channel
Range (ORP) ±2000.0mV
22

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!

23

OHAUS™ Aquasearcher™ pH Meter AB33PH

The Aquasearcher™ pH Meter AB33PH is a highly reliable and user-friendly pH benchtop meter with electrode (ST310) for standard laboratory applications. Designed to measure pH and oxidation-reduction potential with temperature measurements.

Accuracy (mV) ±1
Log Function Type 1000 Measurement, Last Calibration
Measurement Modes Auto-stop,Continuous
Range (pH) -2 to 16
Calibration Linear
Accuracy (pH) ±0.01
Calibration Points Up to 3
Data Management Details Datalog with Time and Date Stamp
Display Type LCD, 6.5 in. Segment and Dot Matrix
Outputs USB, RS-232 (PC), RS-232 (Printer)
Data Points 1000 Sets
Backlight Option LCD
Temperature Range (Metric) -5°C to +110°C
Range (mV) ±2000.0
Accuracy (Temperature) ±0.5°C
24

OHAUS™ Starter Water Analysis Portable pH Meters

LCD meters combine portability with precise pH measurement.

Width (English) 3.5 in.
Measurement Modes pH with mV and Temperature
Range (pH) 0 to 14
Width (Metric) 9 cm
Accuracy (pH) ±0.01
Battery Life >500 hr.
Data Management Details 30 Sets, most recent calibration data
Display Type LCD
Resolution (mV) 1 mV
Data Points 30
Inputs BNC, NTC
Accuracy (Temperature) ±0.5°C
Height (English) 1.3 in.
Weight (Metric) 0.18 kg
Height (Metric) 3.5 cm
Accuracy (mV) ±1
Log Function Type Automatic Data Logging
Material ABS
Calibration Automatic/Manual
Battery Type AAA
Calibration Points 1 to 3
Type Portable pH Meters
IP Rating IP54
Depth (Metric) 17 cm
Backlight Option None
Resolution (Temperature) 0.1°C
Temperature Range (Metric) 0°C to 100°C
Range (mV) -1999 to 1999
Resolution 0.01 pH; 1 mV; 0.1°C
25

Thermo Scientific™ Elite ORP Pocket Testers and Replacement Sensors

Flexible on-the-go ORP testing using durable Elite ORP pocket testers with replaceable sensors for a variety of applications including hydroponics, food and beverage, environmental and more!

26

Oakton™ pHTestr™ Waterproof Pocket pH Testers

Oakton™ pHTestr™ Waterproof Pocket pH Testers have large easy-to-read LCD display featuring three-color backlight

Height (Metric) 4 cm
Accuracy (mV) ±0.2% full-scale
Warranty 2 Years
Measurement Modes pH
Range (pH) -2 to 16
Calibration USA, NIST
For Use With (Application) Water Quality Testing
Width (Metric) 4 cm
Battery Type 4 AAA
Channels 1
Accuracy (pH) ±0.01
Calibration Points 1, 2 or 3
Includes pH Tester, protective plastic storage case, lanyard, and four AAA batteries.
Type pH Tester
Battery Life 400 hr.
Temperature Compensation Automatic
Display Type LCD
IP Rating IP67
Backlight Option Yes
Temperature Range (English) 32°F to 122°F
Certifications/Compliance CE
Resolution (Temperature) 0.1°F/°C
Temperature Range (Metric) 0°C to 50°C
Accuracy (Temperature) ±0.5°C;/±0.9°F
27

Oakton™ ORPTestr™ 5 Waterproof Pocket Tester

Oakton™ ORPTestr™ 5 Waterproof Pocket Tester features a large easy-to-read LCD with a three-color backlight

28
Promotions Available

Fisherbrand™ accumet™ AP110 Portable pH Meter Kit

Accurate measurements anytime, anywhere.

29
Promotions Available

Thermo Scientific™ PH111 pH/mV Bench Meter Easy-to-Clean Bio Kit PROMO

Orion Lab Star PH111 pH bench 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.