pH

WTW offers ...

WTW pH Meters

pH is after weighing and temperature measurement among the three most frequent measurements in laboratories. It describes the activity of hydrogen ions which determines how acid or alkaline a solution is. The pH value is essential for biological, chemical, and bio-chemical processes as well as for the characteristics of many products. The most secure and accurate measurement is done by a pH glass electrode. A sensitive glass membrane detects small voltage changes caused by the hydrogen ions in the sample in comparison to a reference electrode. These voltages are converted to the pH value in the meter.

IDS pH electrodes do this conversion of these weak signals directly in the sensor. This provides a crucial quality increase. Simultaneously the digital transfer to the meter of the data allows cable lengths up to 100 m as well as extensive documentation features and the unique sensor condition display (QSC).

  • inoLab® pH Benchtop Meters
  • Portable pH Meters
  • SenTix® pH electrodes for every application
  • Digital IDS pH Electrodes
  • Calibration and maintenance
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Sets for benchtop meters

All benchtop meters are available in application oriented sets including sensors and accessories.

Measuring pH securely…

… with the innovative inoLab® Multi 9310 IDS

 

inoLab? Multi 9310P IDS

  • Optimum measuring quality
  • Digital sensor recognition
  • Intelligent sensor rating

IDS pH-Elektroden

The new inoLab® Multi 9310 IDS is ideal for pH measurements in the laboratory. The IDS technology enables exceptional measuring quality and efficient documentation in the easiest way.

Measuring safety

  • The digital signal transmission eliminates interference, ensures calibration data is set correctly, and transmits sensor data easily.
  • The intelligent sensor evaluation (QSC) gives information about the current condition of the electrode and therefore improves the operational reliability.
  • The CMC function displays the optimal measuring range and helps ensure a correct measurement

Measuring channel 1 (universal)
Display LCD graphic, backlit
CMC/QSC Yes/Yes
Data storage Manual: 500 data sets/Automatic: 5000 data sets
Logger Manual/time-controlled
Interface Mini USB
Printer (optional) Thermo printer, width 58 mm
Power supply Universal power supply 100 to 240 V, 50/60 Hz, 4 x 1,5 V AA or 4 x 1.2 V NiMH rechargeable battery

Reliable pH documentation…

… with the inoLab® pH 7310

 

inoLab? pH 7310P

  • USB interface for fast data transfer
  • Data output in .csv format or via optional built-in printer
  • CMC-function for monitoring the measuring range

The new inoLab® pH 7310 is the ideal instrument for precision measurements and automatic documentation complying with GLP/AQS in quality laboratories throughout all industries. Optional built-in printer available on demand.

Measuring reliability

  • Repeatable measuring results provided by the active, automatic AutoRead function with recognition of stable end values
  • The CMC function visualizes the optimal measuring range and supports correct measuring
  • Graphic display with plain text menu for convenient and secure operation

pH -2.0 … 20.0 ±0.1 pH
-2.00 … 20.00 ±0.01 pH
-2.000 … 19.999 ±0.005 pH
mV ±(1200.0 ±0.3) mV
Temperature -5.0 … +105.0 °C ±0.1 °C

Measuring pH precisely …

… with the inoLab® pH 7110

 

inoLab? pH 7110

  • Active AutoRead function
  • Easy calibration with adjustable calibration timer
  • Intuitive operation with clearly arranged keypad

The new inoLab® pH 7110 is ideal for routine measurements in the laboratory where automatic documentation is not the priority. 
With a smooth and easily cleaned surface.

Measuring reliability

  • Repeatable measuring results provided by the active, automatic AutoRead function with recognition of stable end values
  • Safe operation: Automized functions reduce the number of keys
  • An adjustable timer recalls the next calibration and so with improves the measuring accuracy

pH -2.0 … 20.0 ±0.1 pH
-2.00 … 20.00 ±0.01 pH
-2.000 … 19.999 ±0.005 pH
mV ±(1200.0 ±0.3) mV
Temperature -5.0 … +105.0 °C ±0.1 °C

 

Portable pH Meters

Field Sets for Portables

Handhelds are available in convenient carry cases including sensors and accessories for immediate use. 

Determining pH securely…

… with the versatile MultiLine® Multi 3410 IDS

 

  • Measuring safety without compromises
  • Digital sensor recognition
  • Trouble-free pH measurements

The multi-parameter measuring instrument Multi 3410 IDS with an universal measuring channel is perfectly suited for portable pH measurements under all conditions in the field and during operation process. The IDS technology enables optimal measurements and efficient documentation in the easiest way. The Multi 3410 also allows measurements using additional sensors and parameters.

Data storage Manual: 500 data sets
Automatic: 10.000 data sets
Data logger Manual/time-controlled
Interface USB-A and Mini-USB
Power supply Universal power supply with charging function or 4 x 1.2 V NiMH rechargeable batteries

Handheld MonoLine pH 3310 IDS

  • Robust and waterproof for field application
  • Digital pH measurement with IDS pH electrodes
  • QSC-function for monitoring the current electrode condition

 

 

 

 

 

The pH 3310 IDS is a handy portable pH meter for use with IDS pH electrodes. IDS pH electrodes store their calibration data and valuable sensor information. It is easy to operate with its well laid out menu guidance. With a wide choice of IDS pH and ORP sensors almost any application in the field and in the laboratory can be covered including depth measurement down to 100 m water depth.

Display Backlit LCD graphic
Memory manual 500 / 5000 automatic
Measuring channel 1
Protection class IP 67
Power supply 4 x 1.5 V AA or 4 x 1.2 V NiMH-rechargeable batteries, or via USB

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Portable Meters ProfiLine pH 3210/3310

 

  • 22 buffer pre-programmed sets
  • CMC for measuring in the optimum measuring range
  • 5-point calibration

A convenient pH/mV instrument for many applications: The pH 3210 is a portable precision pH/mV meter with an intuitive user interface. The unique Continuous Measurement Control (CMC) feature ensures that measured values and calibration ranges are within the optimum range, particularly useful for someone less familiar with pH measurements.
The pH 3310 is an elegant combination of a portable meter and data logger for those who automatically save measurement data and want to further process data on a PC. Measurement characteristics and ease-of-use correspond to those of the pH 3210.

pH -2.000 ... +19.999 ±0.005 pH
mV -1200.0 ... +1200.0 ±0.3 mV
-2500 ... +2500 ±1 mV
Temperature -5.0 ... +105.0 ±0.1 °C

Portable Meters ProfiLine pH 3110

 

  • pH or ORP measurements
  • 3-point calibration
  • Built-in calibration timer

The pH 3110 is the right choice for those looking for a simple, rugged and waterproof device for portable pH measurement. The keypad with only 6 buttons and the automatic AutoRead function for reproducible measured values provide safe pH measurements and prevent errors.

pH -2.000 ... +19.999 ±0.005 pH
mV -1200.0 ... +1200.0 ±0.3 mV
-2000 ... +2000 ±1 mV
Temperature -5.0 ... +105.0 ±0.1 °C

 

SenTix® pH electrodes for every application

SenTix® quality electrodes by WTW – convenient measurement and precision.

  • Low-resistance glass membranes guarantee stable measuring signals even at low temperatures.
  • Silver ion-free reference electrolyte, together with the proven platinum wire diaphragm, prevent measurement problems by precipitating silver compounds.
  • Functional slide for accessing the refill opening for electrodes with liquid electrolyte.
  • Typical connections: Waterproof DIN connector, BNC connector, fixed cable (1 or 3 m) or connector head (S7).

Low-maintenance pH electrodes with gel electrolyte

 

  • SenTix® 20
  • SenTix® 21
  • SenTix® 21-3
  • SenTix® 22
  • SenTix® 41
  • SenTix® 41-3
  • SenTix® 42

Ideal for portable measurements, as well as for routine measurements in-the-laboratory. With or without built-in temperature probe all electrodes have robust plastic shafts and a low-maintenance gel reference system.

SenTix® all given models above
pH 0 ...14 pH
°C 0 … 80 °C

Fast and precise – pH electrodes with liquid electrolyte

 

  • SenTix® 51
  • SenTix® 52
  • SenTix® 60
  • SenTix® 61
  • SenTix® 62
  • SenTix® 81
  • SenTix® 82
  • SenTix® 91
  • SenTix® 92

For demanding measurements in-the-laboratory. SenTix® electrodes with liquid electrolyte, an easy-to-clean glass shaft and platinum diaphragm can be used even for complicated samples. For those who need an electrode with liquid electrolyte for a portable measurement: The SenTix® 51/52 with plastic shaft, built-in temperature probe and ceramic diaphragm is suited for nearly any measuring task.

SenTix® 51/52 60/61/62 81/82 91/92
pH 0 ...14 pH 0 ...14 pH 0 ...14 pH 0 ...14 pH
°C 0 … 80 °C 0 ...100 °C 0 ... 100 °C 0 … 100 °C

Specialists for every situation - pH-electrodes for special applications

 

  • SenTix® H
  • SenTix® HW
  • SenTix® HWD
  • SenTix® SP
  • SenTix® SP-DIN
  • SenTix® Sur

 

  • SenTix® Mic
  • SenTix® Mic-D
  • SenTix® Mic-B
  • SenTix® RJD
  • SenTix® V

Special samples need special electrodes. SenTix® Special Electrodes can take on the challenges associated with measuring the pH value of surfaces, solids, suspensions, emulsions, low ionic samples, smallest volumes and more.

SenTix® H HW HWD SP(-DIN) Sur
pH 0 ...14 pH 0 ...14 pH 0 ...14 pH 2 ...13 pH 2 ...13 pH
°C 0 … 80 °C 0 ... 60 °C -5 … 100 °C 0 ... 80 °C 0 ... 50 °C

SenTix® Mic Mic-D/Mic-B RJD V
pH 0 ...14 pH 0 ...14 pH 2 … 13 pH 0 … 14 pH
°C 0 ... 100 °C -5 … 100 °C 0 ... 80 °C 0 … 80 °C

 

Digital IDS pH Electrodes

 

  • SenTix® 940
  • SenTix® 940-3
  • SensoLyt® 900-P
  • SenTix® 950
  • SenTix® 980
  • SenTix® ORP 900
  • SensoLyt® ORP 900-P

pH electrodes are the most commonly used electrochemical sensors. At the same time, they provide the most sensitive measuring signals and must be serviced and calibrated on a routine basis. The concept of IDS sensors precisely takes effect here.
Digital data transfer without interferences allows the user to use a long cable and enables important additional information such as calibration data and sensor ID.

SenTix® 940/940-3 950 980
pH 0.000 … 14.000
± 0.004		 0.000 … 14.000
± 0.004		 0.000 … 14.000
± 0.004
°C 0 … 80 °C 0 … 80 °C 0 … 100 °C

SensoLyt® * 900-P ORP 900-P
pH 2.000 ... 12.000 ± 0.004 —
mV — ± 1200.0 ± 0.2
°C 0 … 60 °C 0 … 60 °C

* Presseure resistant up to 10 bar (IP 68)