Portable pH Meters

Instruments used to measure the acidity or alkalinity of a sample, and designed for portability and durability.

Portable pH meters are most often used away from the physical lab to measure the acidity or alkalinity of liquids in more remote locations.

A pH meter actually measures hydrogen-ion activity in water-based solutions. The liquid’s acidity or alkalinity is expressed as a pH unit. The pH scale ranges from 0 to 14, meaning a liquid with a pH below 7 is acidic and a pH above 7 is basic. A pH of 7 is considered neutral.

Also called electrochemistry meters, pH meters are potentiometric and determine the difference in electrical potential between the measuring electrode and a reference electrode.

Some portable pH meters accomplish routine tasks, often used to determine the pH of swimming pools and meet other commercial needs. These are sometimes called pH testers. Indicators or litmus papers can also be used to qualitatively measure pH.

Modern portable pH meters are typically digital and may detect more than pH. Some are equipped to measure specific ions, dissolved oxygen content, or conductivity.

Many portable pH meters are waterproof to protect against accidental dropping or adverse environmental conditions like rain or snow. Some electrodes are also equipped with longer cables to allow for submersion in a reservoir of water or other liquid.

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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.

Pricing & Availability
Specifications

Memory	Non-volatile memory preserves log and settings
Resolution (pH)	0.01, 0.1
Languages	English
Measurement Modes	pH, mV or 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 Node
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	IP-67
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™ AP115 Portable pH Meter Kit

Accurate measurements any time, anywhere

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Fisherbrand™ accumet™ AP110 Portable pH Meter Kit

Accurate measurements any time, anywhere

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Fisherbrand™ accumet™ AP110 Portable pH Meter

Accurate measurements any time, anywhere

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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

OHAUS™ Starter Water Analysis Portable pH Meters

LCD meters combine portability with precise pH measurement.

Pricing & Availability
Specifications

Height (Metric)	3.5 cm
Accuracy (mV)	±1
Width (English)	3.5 in.
Resolution (pH)	0.01
Material	ABS
Range (pH)	0 to 14
Width (Metric)	9 cm
Battery Type	AAA
Accuracy (pH)	±0.01
Calibration Points	1 to 3
Battery Life	>500 hr.
Data Management Details	30 Sets, most recent calibration data
Display Type	LCD
IP Rating	IP-54
Depth (Metric)	17 cm
Resolution (mV)	1 mV
Resolution (Temperature)	0.1°C
Temperature Range (Metric)	0°C to 100°C
Range (mV)	-1999 to 1999
Inputs	BNC, NTC
Accuracy (Temperature)	±0.5°C
Height (English)	1.3 in.
Resolution	0.01 pH; 1 mV; 0.1°C
Weight (Metric)	0.18 kg

Fisherbrand™ accumet™ AP115 Portable pH Meter

Accurate measurements any time, anywhere

Pricing & Availability

Mettler Toledo™ FiveGo™ F2 pH/mV Meters

Portable meter provides reliable and high quality pH/mV measurements with simple click of a button

Promotions are available

Pricing & Availability
Specifications

Accuracy (mV)	±1
Memory	200 measurements, current calibration
Resolution (pH)	0.01
Range (pH)	0 to 14
Calibration Points	3
Temperature Compensation	ATC and MTC
Dimensions (L x W x H)	18.8 x 7.7 x 3.3 cm (97.4 x 3 x 1.3 in.)
Display Type	LCD
Resolution (mV)	1mV
Weight (English)	0.5 lb.
Resolution (Temperature)	0.1°
Inputs	BNC, Cinch
Accuracy (Temperature)	±0.5°C
Weight (Metric)	0.26 kg

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™ 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!

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Oakton™ PCTSTestr™ 5 Waterproof Pocket Tester

Oakton™ PCTSTestr™ 5 Waterproof Pocket Tester performs conductivity, pH, salinity, and TDS testing all in one meter

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Oakton™ Waterproof Big Display pHTestr™ 30

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

Pricing & Availability
Specifications

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
Resolution (pH)	0.01
Range (pH)	-1 to 15
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	IP-67
Diameter (Metric)	3.8 cm
Certifications/Compliance	USA, NIST
Resolution (Temperature)	0.1°C
Temperature (Metric) Operating	0°C to 50°C
Accuracy (Temperature)	±1°C
Resolution	0.1pH

Oakton™ ORPTestr™ 5 Waterproof Pocket Tester

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

Pricing & Availability

Oakton™ pHTestr™ Waterproof Pocket pH Testers

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

Pricing & Availability
Specifications

Height (Metric)	4 cm
Accuracy (mV)	±0.2% full-scale
Warranty	2 Years
Resolution (pH)	0.01
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, Dual-Line
IP Rating	IP67
Temperature Range (English)	32°F to 122°F
Certifications/Compliance	CE; IP67
Resolution (Temperature)	0.1°F/°C
Temperature Range (Metric)	0°C to 50°C
Accuracy (Temperature)	±0.5°C;/±0.9°F

Oakton™ pHTestr 50 Waterproof Pocket pH Tester

Oakton pHTestr 50 has a replaceable double junction sensor for longer life, an expanded number of applications, and easy maintenance. Versatile, compact design works in the field or laboratory

Pricing & Availability

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Portable pH Meters

Portable pH Meters

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