Ph-meter ARW 220S

Ergonomic digital pH meter

Version with pH electrode spear tip for penetration pH measurements

Suitable for many applications: In the food industry in general, in the control of potable water, lakes and rivers, fishing industry, schools, swimming pools, analysis laboratories and in all processes where it is necessary to control quality through the measurement of pH.

Ideal for measuring a lot of products: in the food industry for measurements on semi-solid products, meat, cheese, pasta, fruit, etc.. in agriculture for the measurement on soils and products and in all cases is necessary a measure with penetration (the electrode can be also used in measuring liquids).

  • Compact, easy to use
  • Equipped with separate electrode to facilitate the use in any situation
  • Measurement range from 0 to 14.00 pH
  • Auto.calibration for pH 4, pH 7 or pH 10
  • Temperature compensation without need for any setting
  • Water-proof, IP65
  • Supplied with separate electrode “PH” and calibration solutions of pH 4 and pH 7
  • Reversible LCD for easy viewing at any angle 
  • Data hold function for the block of reading 
  • “Auto power off” function

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LCD, Size: 20 mm x 28 mm.


* Reversible pressing the appropriate

Measuring range

0 - 14 pH x 0.01 pH di resolution


0.01 pH


± 0.07 pH (from pH 5 a pH 9 )


± 0.1 pH (from pH 4 to pH 5 e pH 9 to pH 10)


± 0.2 pH (from pH 1 to pH 4 e pH 10 to pH 13)


* 23± 5 * After the calibration

Input impedance

10^12 ohms.

Temperature compensation


Sampling Time

Approx. 0.8 secondi

Operating temperature

from 0°C to 50°C ( 32 °F a 122 °F)

Operating Humidity

Less than 80% RH

Calibration method

Auto-calibration, pH 7, pH 4 (o pH 10)

Power supply

DC 1.5V, 4 Batteries (UM-4/AAA)

Power consumption

Approx. 4.8 mA


Instrument: 180 x 40 x 32mm (7.1 x 1.6 x 1.3 inch) Electrode: version 220: 9.5 mm diam. x 120 mm


version 220S: 12 mm diam. x 160 mm


Electrode cable length: approx. 1 m.


220 g/0.48 LB (including electrodes)

PH electrode

Epoxi with BNC

Supplied with

Instrument............................1 PC PH electrode...............................1 PC

Solution pH 7.00, PH-7A..........1 PC

Solution pH 4.00, PH-4A..... ....1 PC Carring Case.....................................1 PC

Download this file (PH-METER and TACHOMETER.pdf)Data Sheet Ph-Meter ARW-220S[ ]141 Kb