Portable pH Meters from Simple to Sophisticated Applications

Portable pH Meter

Field and At-Line Measurements Made Easy

Please choose the Portable Meter that suits you best:

Portable pH Meter
Portable pH Meter
Portable pH Meter

Seven2Go Advanced Single-Channel Portable pH Meter

FiveGo Standard Single-Channel Portable pH Meter

SevenGo Duo - Dual-Channel Portable pH Meter

Robust, easy-to-use portable meter suited for pH, conductivity, DO, ORP and ion concentration both in the lab and on the go.
Complete portable meter for rapid and reliable results on a budget.
Flexible, dual-channel meter for measuring pH, conductivity, DO, ORP and ion concentration in any workplace.
Portable pH Meter

Robust, easy-to-use portable meter suited for pH, conductivity, DO, ORP and ion concentration both in the lab and on the go.

Portable pH Meter

Complete portable meter for rapid and reliable results on a budget.

Portable pH Meter

Flexible, dual-channel meter for measuring pH, conductivity, DO, ORP and ion concentration in any workplace.

Please choose the Portable Meter that suits you best:

Portable pH Meter
Portable pH Meter
Portable pH Meter

Seven2Go Advanced Single-Channel Portable pH Meter

FiveGo Standard Single-Channel Portable pH Meter

SevenGo Duo - Dual-Channel Portable pH Meter

Robust, easy-to-use portable meter suited for pH, conductivity, DO, ORP and ion concentration both in the lab and on the go.
Complete portable meter for rapid and reliable results on a budget.
Flexible, dual-channel meter for measuring pH, conductivity, DO, ORP and ion concentration in any workplace.
Portable pH Meter

Robust, easy-to-use portable meter suited for pH, conductivity, DO, ORP and ion concentration both in the lab and on the go.

Portable pH Meter

Complete portable meter for rapid and reliable results on a budget.

Portable pH Meter

Flexible, dual-channel meter for measuring pH, conductivity, DO, ORP and ion concentration in any workplace.

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FAQ

Should I have a dedicated or Multi-function pH meter?

This depends on your application. Dedicated portable meters can be used for single parameter measurement (pH, ORP, ion concentration, conductivity or dissolved oxygen). Multi-parameter system is required to measure more than one parameter in the same workplace.

How do I know if my pH reading is accurate?

Firstly, your calibration results indicate your system performance. After calibration, you can perform verification (measure in known buffer solution) to ensure your measurement is accurate. The acceptance is +/- 0.05pH units of the known pH value at the measured temperature. Use your calibration points as a bracket for the pH range of your sample. It is recommended to use at least two points. Use best practices as well such as keeping the glass bulb hydrated and opening the fill hole.

What is my calibration slope and offset, and what does that mean?

The calibration slope is a conversion from a sensor signal in mV to a pH reading. The offset is the mV reading of the sensor when it is measured in pH 7 buffer. Your offset should not exceed +/- 30 mV.

What calibration points should I use?

Calibration should cover the range of the desired measurement values. The most common pH electrode calibration method is two-point calibration.

What is ATC?

ATC (Automatic Temperature Compensation) allows the pH meter to compensate for temperature variations that may affect the accuracy of your pH measurements.

What is the difference between linear and segmented calibration?

Please see the above graphs showing the difference between linear and segmented calibration modes.

After performing a segmented calibration with 3 buffers, 2 slope and 2 offset values are given by the meter. When performing a linear 3 point calibration, you get only one slope and one offset value based on the line drawn by linear regression (fitted using the least squares approach) between all 3 calibration points.

The difference between these two methods is that the segmented calibration is considered to be more accurate, because it fits more the real behavior of an electrode than just one line.

When performing a measurement after a segmented calibration, the instrument takes the slope and offset according to the pH value measured. For e.g., if the measured value is pH 5, the slope/offset values between pH 4.00 & pH 7.00 will be used. If the measured value is pH 9, the slope/offset between pH 7.00 & pH 10 will be used.

When performing a measurement after a linear calibration, in case of measured pH 5 and pH 9, the same slope value is used for calculation.

What does IP67 mean?

IP stands for 'Ingress Protection'
An IP number is used to specify the environmental protection of enclosures around electronic equipment. These ratings are determined by specific tests. All out portable pH meters are IP67 compliant.
The IP number is composed of two numbers, the first referring to the protection against solid objects and the second against liquids. The higher the number, the better the protection.

First Number

0

- No protection (Sometimes X)

1

- Protected against solid objects up to 50 mm³

2

- Protected against solid objects up to 12 mm³

3

- Protected against solid objects up to 2.5 mm³

4

- Protected against solid objects up to 1 mm³

5

- Protected against dust, limited ingress (no harmful deposit)

6

- Totally protected against dust

Second Number

0

- No protection (Sometimes X)

1

- Protection against vertically falling drops of water (e.g. condensation)

2

- Protection against direct sprays of water up to 15 degrees from vertical

3

- Protection against direct sprays of water up to 60 degrees from vertical

4

- Protection against water sprayed from all directions - limited ingress permitted

5

- Protected against low pressure jets of water from all directions - limited ingress permitted

6

- Protected against low pressure jets of water, limited ingress permitted (e.g. ship deck)

7

- Protected against the effect of immersion between 15 cm and 1 m

8

- Protected against long periods of immersion under pressure

 

Join the GEP eLearning Program
Know the Risk of Your pH Measurement
Ion Selective Electrode Guide – Theory and Practice
pH Theorie Guide
How to Measure pH in Small Samples
pH Toolbox for Life Sciences
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