testo 206 pH2 - pH meter

Order-Nr.  0563 2066

  • Ideal for measuring the pH value of semi-solid media, viscous and protein-containing foodstuffs (eg. processed cheese, fruit) and water-mixed solid cooling lubricants

  • Temperature measurements with integrated temperature sensor possible

  • Maintenance-free gel electrolyte

  • The set contains essential accessories, which you will always have to hand: calibration dosing bottles, TopSafe protective case, aluminium case, etc.

The testo 206 pH2 pH meter measures the pH value and temperature of semi-solid media safely and reliably. Ideal for use in laboratories, the food and other industries.


Product Description

The testo 206 pH2 pH meter can be used virtually anywhere: in the food industry, the cosmetics industry, the metal industry. Ideal for measuring the pH value of various media including:
  • Solid/semi-solid food (jelly, cheese, fruit etc.)
  • Liquid/soft/ paste-like materials (creams, oils etc.)
  • Water-mixed solids (cooling lubricants etc.)

Clever measurement technology – Intelligent features

The testo 206 pH2’s immersion tip and integrated temperature sensor allow you to perform quick and reliable pH measurements and accurate core temperature measurements simultaneously.
The pH sensor is waterproof, maintenance-free, extremely durable and insensitive to dirt.  
Ideal for carrying out 1, 2, 3-point calibrations. Includes automatic final value recognition function.

Hygienic and rugged

The testo 206 pH2 comes with a TopSafe IP68 rated housing which protects the dishwasher safe meter case against dirt, water and impact.

Delivery Scope

testo 206 pH2 pH meter, gel storage cap, TopSafe protective housing, belt buckle, and wall bracket

Technical Data

Temperature - NTC

Measuring range

32° to 140 °F / 0 to +60 °C (Short-term to +80 °C max. 5 min)


±0.7 °F / ±0.4 °C


0.1 °F / 0.1 °C

pH - Electrode

Measuring range

0 to 14 pH


±0.02 pH


0.01 pH

General technical data


4.1 oz. (with TopSafe) / 115 g (with TopSafe)

2.3 oz. (without TopSafe) / 65 g (without TopSafe)


8 x 1 x 1 in. ((LxWxH)) / 197 x 35 x 20 mm ((LxWxH))

4.3 x 1.3 x 0.8 (without probe and TopSafe) / 110 x 33 x 20 (without probe and TopSafe)

Operating temperature

32° to 140 °F / 0 to +60 °C



Protection class


Product colour



CE 2014/30/EU

Length probe shaft

1.378 in. / 35 mm

Diameter probe shaft

0.433 in. / 11 mm


DIN EN 12830

Battery type

1 x CR2032

Battery life

80 h (Auto Off 10 min)

Display type


Display size

2 lines

Number of channels


Measuring rate

2 measurements per second

Temperature compensation


Storage temperature

-4° to 158 °F / -20 to +70 °C


The professional pH measuring instrument for drinking water analysis

With the development of different, breakproof probe geometries, Testo is making available special solutions for liquid as well as for viscoplastic substances. The leakproof storage solution is also new. pH probes must be stored in moist conditions, when not in use, in order to prevent the glass membrane coating around the measurement electrode and the diaphragm from drying out.

Pure water alone should not be used since water would release the conducting components contained in the probe electrolytes. A potassium chloride solution is usually used for this purpose. As with every liquid, it can leak which, particularly in the food branch, can lead to contamination of raw foodstuffs or products. Testo, with its new gel storage, has eliminated this disadvantage. The potassium chloride solution is available in a container in gel form. What doesn’t drip can’t leak!

The professional pH measuring instrument for the food sector

Measurement of the pH value plays an important role in many areas. Anywhere where

there are chemical and biochemical reactions,the pH value has an important indicator function.

Compact pH measuring instrument for measuring liquids. Built-in temperature probe for efficient temperature compensation. Automatic recognition of a stable reading makes it easier to measure. The "TopSafe" case included makes the instrument ideal for outdoor applications or

for use in tough industrial conditions.

Your benefits

• Versatile, accurate pH measuring instrument

• Not affected by dust or dirt thanks to the TopSafe protection case

• Maintenance-free gel electrode

• Built-in temperature probe

• 2 line display

• Automatic full scale value recognition

• 1, 2, or 3 point calibration possible

pH measurement in the cosmetics industry

The pH value is a crucial factor when it comes to assessing the quality of cosmetic products. Cosmetic products which are too acidic can cause skin irritations or rashes. The pH value of the skin is normally between 5 and 6.5 thanks to its natural protective acid mantle. “Skin-neutral” cleansers are actually slightly acidic and can support the skin's protective acid mantle, which is particularly important for people with sensitive skin. On the other hand, alkaline cleansers could encourage the skin's process of replenishing its natural oils.

The pH value of cosmetics must therefore be monitored, controlled and, if necessary, adjusted right from the production stage, so that the end product has the required value. The testo 206 one-hand pH measuring instrument helps you to do this through:

- Direct measurement in process for fast assessment of the pH value

- Three different versions of the product – depending on the medium in which the measurement is being made (e.g. liquid, paste-like, etc.)

- Robust, waterproof and dishwasher-safe “TopSafe” protective cover (protection class IP68) to meet strict cleaning requirements in the pharmaceutical sector.

- Built-in temperature probe for simultaneous measurement of two parameters

- Maintenance-free gel electrolyte

- 1, 2 or 3-point calibration possible