Home / Products / WTW / Laboratory and Field Instrumentation / PH Measurement / Electrodes / Digital IDS pH Electrodes – Liquid Electrolyte

Digital IDS pH Electrodes – Liquid Electrolyte

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

Enquire Now

Digital IDS pH Electrodes

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.

FeaturesTechnical DataDownload

Safely 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

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: 0.000 … 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