Hach-Lange NISE sc - Manual (Page 8)

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General information
2.2 General information about the probes
The probes have been developed for use in municipal waste water applications.
The ISE probes (refer to Figure 2 ) feature ion-selective electrodes for continuous
measurement of ammonium and/or nitrate in the tank itself. They operate without reagents
and require no further processing of the sample. The ammonium/nitrate ions are
measured using an ion-selective electrode.
The only wearing part is the sensor cartridge (refer to Figure 3, Page 9 ) (order number
LZY694). The sensor cartridge consists of the ion-selective electrodes for ammonium and
potassium (compensation electrode for ammonium) or nitrate and chloride (compensation
electrode for nitrate), a pHD reference system and a temperature sensor for comparing
temperatures.
Note: Note that the nitrate and chloride electrodes are deactivated when using the AISE sc probe.
When using the NISE sc probe, the ammonium and potassium electrodes are deactivated.
An additional cleaning unit designed for automatically cleaning the sensor cartridge
membranes can be ordered separately. For details, refer to the instruction sheet supplied
with the cleaning unit.
The manufacturer recommends to use the High Output Air Blast system for the
compressed air supply (refer to
7.2 Accessories, page 39 ); This is a compressor in
weather-proof plastic housing.
Figure 2 ISE probe
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1
2
3
1 Sensor cartridge 3 Probe body
2 Fixing bolt for sensor cartridge 4 Union nut