Gas Sensing Electrodes - 23 series

These electrodes have a gas permeable membrane. The internal electrode system is formed by a glass pH electrode and an Ag/AgCl reference electrode as a combined pH electrode with a flat glass membrane. The outer side of the glass membrane is covered by a microporous gas-permeable filter. The space between the flat glass membrane and the gas-permeable filter is filled with a thin film of buffer. Spare gas permeable filters, internal and preservative buffers, injection needle and syringe for filling the electrode with internal buffer are available as accessories and can be ordered separately. The electrode housing is made of plastic. The electrode is equipped with a 1 m coaxial cable ending in a BNC connector.

Electrode Data Sheet - 23 Series




Electrode
Type


Range

temperature range [°C]
Max. electrical resistance

[Mohm]
Max. electrical resistance [Mohm] Max. resistance [MΩ] Contact range [mol/L]
Range

pH for direct potentiometry
Electrolyte ISA/pH
Interaction


ammonia
10-23
0-40
500
10-1 - 10-6
13
NaOH
volatile amines


carbon dioxide
12-23
0-40
500
10-1 - 10-5
3
NaXCO4
volatile weak acids




REDOX Polarographic Gas Sensors - Series 25

These sensors have a gas permeable membrane. The internal system consists of an Ag/AgCl reference electrode and a REDOX platinum erecrode, which is separated from the gas-permeable membrane only by a thin layer of internal solution. Spare gas permeation filters, internal and preservative buffers, injection needle and syringe for filling the electrode with internal buffer are available as accessories and can be ordered separately. The sensor housing is made of plastic. The sensor is equipped with a 1 m cable with connector for connection to an amperometric input.

Sensor parameter table - Series 25




Polarographic sensor
Type


Range

temperature range [°C]
Max. electrical resistance

[kohm]
Range


dissolved oxygen
08-25
0-40
100
0 -100% saturation or 0 - 200 mbar




Added T designator for 25 series probes

Probes with this designation have a built-in PT1000 temperature sensor. These probes have an additional connector for connecting a temperature sensor.