Truly Universal and Reliable

S220 pH/ISE Meter
S220 pH/ISE meter

The SevenCompact™ series combines precise electrochemical measurement technologies with flexibility, innovative design and ease-of-use.

The SevenCompact™ pH/Ion meter S220 is the perfect choice for a wide range of applications. It is much more than a pH meter: it can also measure ORP and ion concentration in various units. Starting a measurement or calibration has never been easier, requiring only a single key press.

Reasons for SevenCompact™

  • Fast and accurate measurements
  • User-friendly operation
  • Menu guidance in 10 languages
  • Clear, well arranged colour display
  • Many peripheral options
  • GLP compliant

Productive Work from the Start

Intuitive and Powerful

The instrument’s functionality has been designed to maximize the productivity of your work. Stand alone, the instrument already offers much functionality, but you can achieve higher efficiency and flexibility by connecting peripherals.


The instrument’s versatility is also reflected in its security package. Users requiring little or no GLP support can easily use the instrument without worrying about security settings. Still they benefit from the functionalities that minimize mistakes, such as calibration support and Intelligent Sensor Management (ISM®). On the other hand, those that need full GLP support will have peace of mind when employing the full spectrum of security functionalities.

All Parameters or the Essentials – Decide by a single key press

The instrument gives you the choice! In the normal screen layout, all available information is visible. By switching to the uFocus™ view you will not be distracted by information of less importance.

Perfect Ergonomics and High Productivity with uPlace™

uPlace™: the electrode arm can be operated with one hand; moving straight up and down. This allows for faster measurements and reduces the risk of the sample vessel tipping over and/or damage to the sensor!

Total Flexibility with Data Processing

Upon reaching endpoint SevenCompact™ allows multiple archiving options: the data can be stored, printed or transferred to LabX direct. Any combination of these three options is possible giving you total flexibility.

Technical Specifications

Measuring rangeResolutionAccuracy
pH-2.000…20.0000.001 / 0.01 / 0.1 ± 0.002
mV-2000.0…2000.00.1 / 1± 0.2
RmV-2000.0…2000.00.1 / 1± 0.2
Ion concentration0.000…1000.0 %
0.000…10000.0 ppm
1.00E-9…9.99E+9 mg/L
1.00E-9…9.99E+9 mmol/L
1.00E-9…9.99E+9 mol/L
-2.000…20.000 pX
±LSD± 0.5%
Temperature MTC-30.0…130.0 °C0.1 °C± 0.1 °C
Temperature ATC-5.0…130.0 °C0.1 °C± 0.1 °C
Calibration pointsMax. 5
Buffer groups8 pre-defined and 1 user-defined
Buffer recognitionAutomatic
Isopotential pointpH 7.00
Temperature compensationAutomatic and manual
Calibration reminderUser-configurable
Electrode status iconShows quality of last calibration
Choice of endpoint formatsAutomatic, manual, timed
Choice of stability criteriaFast, standard, strict
Choice of pH decimal placesX.XXX, X.XX, X.X
Temperature captureAutomatic and manual
Serial measurementsTime interval user-configurable
System and GLP
Menu guidance10 languages
Display colour schemeBlue, red, green, grey
Time and date2 time formats, 4 date formats
PIN protectionLogin, deletion of data, system settings
Measurement limitsUser-defined
Instrument modesRoutine mode / expert mode
ID inputUser ID, sample ID, sensor ID, sensor SN
ID input automationBarcode reader and keyboard (USB)
Data processing
Data storage1000 measurements
Print formatsShort, normal, GLP
Data ExportUSB-stick, LabX direct PC software
pH Sensor inputBNC (impedance > 3 x 10E+12Ω)
Temperature sensor inputCinch/RCA (NTC30 kΩ or Pt1000)
Reference input2 mm Ref.
Digital sensor inputmini-LTW
Communication interfacesRS232, USB-A, USA-B
Stirrer connectorMini-DIN
Power requirementsDC 9–12V/10W
Size/weight204 x 174 x 74 mm, 890 g
Ambient conditions
Temperature5…40 °C
Relative humidity5…80% (non-condensing)
Installation categoryII
Pollution degree2
AltitudeUp to 2000 m above sea level
Ingress protection
Protection levelIP54
HousingABS/PC reinforced
WindowPolymethyl methacrylate (PMMA)
KeypadMembrane keypad: Polyethylene terephthalate (PET)


Page reviewed: 18th December 2017