WTW - a xylem brand

Digital IDS pH Electrodes

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Digital measurement of pH with built-in electrode quality monitoring - usable in all areas of lab and field measurement.

  • Safe measured values due to signal processing in the sensor
  • Easy electrode replacement thanks to calibration data stored inside sensor
  • Sensor quality monitoring by QSC function

pH electrodes are the most frequently used electro-chemical sensors. They are used practically in all areas of lab and field measurement. At the same time, the deliver the most sensitive measuring signals and must be serviced and calibrated at regular intervals.

This is exactly where the concept of IDS sensors comes in. Digital data transfer is safe against interference, allows the use of long cables and permits important additional information such as calibration data and sensor recognition.

WTW offers a wide variety of IDS pH electrodes for field use, all the way to special applications in the lab. The QSC function allows monitoring of the current sensor status with all IDS pH electrodes.

Technical Data

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

mV

– – –

   

Temp.

0 … 80 °C

0 … 80 °C

0 … 100 °C

SenTix®

945

Micro 900

Sp-T 900

HW-T-900

Measuring range

pH: 0.000 … 14.000 ± 0.002

pH: 0.000 … 14.000 ± 0.002

pH: 2.000 … 13.000 ± 0.002

pH: 0.000 … 14.000 ± 0.002

Area of use

0 … 80 °C

0 … 100 °C

0 … 50 °C

0 … 60 °C

Reference electrolyte

Gel

KCl 3 mol/l

Polymer

KCl 3 mol/l

Membrane form

Sphere

Cylinder

Spear

Cylinder

Diaphragm

3 x ceramic

Platinum wire

Hole

Grinding

Shaft material

Glass

Glass

Plastic

Glass

Shaft length

120 mm

70/130 mm

65/25 mm

120 mm

Shaft diameter

12 mm

12/5 mm

15/5 mm

12 mm

Temperature sensor

NTC 30 kOhm

NTC 30 kOhm

NTC 30 kOhm

NTC 30 kOhm

Connecting cable

1.5 m with digital plug

0.5 m with digital plug

0.5 m with digital plug

0.5 m with digital plug

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