Product Overview

The S401 DIG/N digital pH electrode provides reliable pH measurement thanks to the use of digital measurement technology. It communicates measurements via the MODBUS RTU protocol and features an integrated temperature sensor.

Main Features

• Reliable pH measure thanks to the use of a digital measurement.
• Communication of measurements via MODBUS RTU protocol.
• Suitable for many industrial applications.
• Easy to connect to the process.
• Integrated temperature sensor.
• 11 bar operating Pressure.
• 100°C Operating Temperature.

Applications

The sensor S401 DIG/N is used for measurement of pH in pure water, wastewater treatment plants, suspended solids processes, processes with pollutants, galvanic processes.

• pH measure in wastewater.
• pH measure in process monitoring and control.

The S401 DIG/N pH Electrode is suitable for pH measures in various applications. The porous Teflon® septum resists fouling and chemical attack. The new capillary temperature sensor design places the NTC behind the pH-sensitive membrane for accurate temperature compensation and measurement.

Technical Data

Specification	Value
Materials	Glass electrode and PPS bodies, PPS probeholder, Viton® O-Rings, Electrode Diaphragm: Teflon®, Electrolyte Gel
Thread	3/4” NPT probeholder, Pg13,5 the electrode alone
Measuring ranges	0-14 pH
Measuring method	Digital
Resolution	0.01 pH
Accuracy	± 0.05 pH
Repeatability	± 0.05 pH
Response pH 4..7	< 30 s
Temperature sensor	NTC 30K
Temperature resolution	0.1 °C
Temperature accuracy	± 0.5 °C
Operating temperature	0 to 100 °C
Max operating pressure	11 bar
Minimum operating conductivity	50 μS/cm
Protocol type	Modbus RTU
Cable length	10m integrated with the sensor
Current absorption	< 1 W
Power supply	12 to 24 V DC
Dimensions (LxHxP)	27 x 213 x 27 mm