ABB expands water quality analyser range with ISE monitors for ammonia and fluoride
ABB
Aztec 600 ISE monitors for fluoride and ammonia
ABB has expanded its Aztec 600 range of potable water-quality analysers to include Ion-Selective Electrode (ISE) monitors for ammonia and fluoride, which use gas-sensing electrodes to monitor ammonia concentrations in water between 0.05 and 1,000mg/litre.
In the Aztec 600 ISE Ammonia model, the sample is drawn in by a pump, passed through two solenoid valves used for calibration, mixed with reagents in the peristaltic pump and finally sent to the sensor flowcell, under temperature-controlled and constant-flow conditions.
The Aztec 600 ISE Fluoride monitor uses a different ion-selective electrode and reagent for the measurement process — the reagent stabilises the pH in the sample and suppresses any chemical interference from metallic compounds, providing a more stable and accurate measurement.
According to ABB, both monitors offer cost savings of up 25 per cent on reagent usage and further savings are achievable through using the monitors’ ’Eco’ mode, which enables users to reduce pump speed in applications where a fast response time is not required — this reduces the amount of reagent consumed.
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