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.

Benchtop pH Meters (145)

Portable pH Meters (96)

1 – 30 of 139 results

Fisherbrand™ accumet™ AP115 Portable pH Meter Kit

Accurate measurements any time, anywhere

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Thermo Scientific™ Orion Star™ A211 Benchtop pH Meter

Reliably measure pH, mV, ORP and temperature with our benchtop pH meter for advanced lab analysis and printer or computer interfacing.

Promotions are available

Pricing & Availability
Specifications

Memory	Non-volatile memory preserves data log, calibration log and meter settings
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 or 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.
Temperature (Metric) Operating	5°C to 45°C (ambient)
Temperature Range (Metric)	-5°C to +105°C
Methods	10 per channel with password protection

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.

Pricing & Availability
Specifications

Power Rating	DC input: 9VDC, 1A
Memory	Non-volatile memory preserves data log, calibration log and meter settings
Resolution (pH)	0.001, 0.01, 0.1
Languages	English, Spanish, French, Italian, German, Chinese, Portuguese and Korean
Measurement Modes	pH, mV, relative mV or 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	IP-54
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
Temperature (Metric) Operating	5°C to 45°C (ambient)
Temperature Range (Metric)	-5°C to +105°C
Methods	10 per channel

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.

Pricing & Availability
Specifications

Type	Portable pH Meter
Weight (English)	0.24 lb.
Range (pH)	0 to 14
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

Fisherbrand™ accumet™ AP110 Portable pH Meter Kit

Accurate measurements any time, anywhere

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Fisherbrand™ accumet™ AP115 Portable pH Meter

Accurate measurements any time, anywhere

Pricing & Availability

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.

Pricing & Availability
Specifications

Memory	Non-volatile
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 Channel
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 Points
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™ accumet™ AP110 Portable pH Meter

Accurate measurements any time, anywhere

Pricing & Availability

Fisherbrand™ accumet™ XL150 Benchtop pH Meters

Provide advanced pH measurements with simple operation and offer a large, vivid color touch-screen display. Fisherbrand accumet XL benchtop meters offer advanced features with simple operation to help ensure your measurements are reliable and your laboratory processes are efficient.

Pricing & Availability
Specifications

Length (Metric)	24.6 cm
Detection Range	Multiple
Length (English)	9.68 in.
Resolution (pH)	0.001, 0.01, 0.1
Range (pH)	-2 to 20
Width (Metric)	17.3 cm
Accuracy (pH)	±0.002
Accuracy	Multiple
Display Type	LCD
Voltage	100/240 V
Resolution (mV)	0.1 mV
Data Points	2000
Certifications/Compliance	NIST, ISO, FDA, USDA, EPA
Inputs	BNC, ATC
Accuracy (Temperature)	±0.3°C
Height (English)	3.89 in.
Weight (Metric)	1.13 kg
Height (Metric)	9.9 cm
Accuracy (mV)	±0.2
Warranty	3 Years
Dimensions (L x W x H)	24.6 x 17.3 x 9.9 cm (9.7 x 6.8 x 3.9 in.)
Outputs	RS-232, USB-A, Mini-B USB, RJ45, stirrer port (2)
Frequency	50/60 Hz
Calibration Points (pH)	Up to 6 pre-set or 5 custom
Weight (English)	2.5 lb.
Resolution (Temperature)	0.1°C
Range (mV)	±2000
Resolution	Multiple

METTLER TOLEDO™ SevenExcellence™ S400 Benchtop pH Meter

The S400 meter measures pH, redox/ORP, and ISFET. It can be expanded with additional modules to measure conductivity, resistivity, DO, BOD, ISE, salinity, and TDS. It has an intuitive touchscreen, the ability to create measurement shortcuts, and can export data to a printer, Excel, or LIMS system.

Promotions are available

Pricing & Availability
Specifications

Accuracy (mV)	±0.1
Resolution (Conductivity)	0.001 to 1
Range (Conductivity)	0.001μS/cm to 2000mS/cm
Resolution (pH)	0.001, 0.01, 0.1
Range (pH)	-2 to 20
Accuracy (pH)	±0.002
Display Type	TFT
Outputs	USB, RS-232, Ethernet
Resolution (mV)	0.1/1mV
Data Points	20000
Calibration Points (pH)	Max. 5 points, 8 pre-defined and 20 user-defined buffer group
Resolution (Temperature)	0.1°C
Temperature Range (Metric)	-30°C to +130°C
Range (mV)	-2000 to 2000
Accuracy (Temperature)	±0.1°C
Calibration Points (Conductivity)	13 pre-defined and 20 user-defined standard

Mettler Toledo™ FiveEasy™ F20 pH/mV Meters

Compact, benchtop meter provides high quality pH/mV measurements with simple click of a button

Promotions are available

Pricing & Availability
Specifications

Accuracy (mV)	±1
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™ 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.

Pricing & Availability
Specifications

Memory	Non-volatile
Resolution (pH)	0.001, 0.01, 0.1
Measurement Modes	pH with mV and temperature or 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

Thermo Scientific™ Orion™ Star A211 pH Benchtop Meter Kit PROMO

Reliably measure pH, mV, ORP and temperature with the Thermo Scientific™ Orion™ Star A211 pH Benchtop Meter for advanced lab analysis and printer or computer interfacing

Promotions are available

Pricing & Availability
Specifications

Memory	Non-volatile memory preserves data log, calibration log and meter settings
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 or ORP with temperature
Range (pH)	-2.000 to 20.000
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)	0.1 mV
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 pH
AC Adapter	Universal 50 to 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
Dimensions (L x W x H)	24 x 18 x 11 cm (9.5 x 7.1 x 4.3 in.)
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)	±2000.0 mV
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)	-5.0°C to +105.0°C
Range (mV)	±2000
Methods	10 per channel with password protection
Range (ORP)	±2000.0 mV

Thermo Scientific™ Orion Star™ A211 pH Benchtop Meter Promotion

Reliably measure pH, mV, ORP and temperature with the Thermo Scientific™ Orion™ Star A211 pH Benchtop Meter for advanced lab analysis and printer or computer interfacing.

Promotions are available

Pricing & Availability

Thermo Scientific™ Orion Star™ A221 Portable pH Meter

Reliably measure pH, mV, ORP and temperature with our portable pH meter for advanced field analysis and printer or computer interfacing.

Pricing & Availability

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.

Pricing & Availability
Specifications

Power Rating	DC input: 9VDC, 1A
Memory	Non-volatile memory preserves data log, calibration log and meter settings
Resolution (pH)	0.001, 0.01, 0.1
Languages	English, Spanish, French, Italian, German, Chinese, Portuguese and Korean
Measurement Modes	pH with LogR temperature, mV, relative mV or 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	IP-54
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
Temperature (Metric) Operating	5°C to 45°C (ambient)
Temperature Range (Metric)	-5°C to +105°C
Methods	10 per channel