Duritate

Residual Total Hardness (0.5 – 9 ppm CaCO3)
Applications: Monitoring and control of de-hardening plants

Technical details
Type of Instrument AQUACON RH
Measuring range 0.5 – 9 ppm CaCO3
Resolution 0.2 ppm CaCO3
Accuracy 2% of end value
Reproducibility 2% of end value
Zero stability automatic adjustment
Sample
Pressure                 0,1 – 10 bar
Temperature           5 – 30°C
Volume (ca.)           25 ml per analysis
Condition
Chemical conditions    (excl. flushing)
rclear, filtered
pH 4 – 10,
Fe < 3 ppm, Cu < 0,2 ppm, CO3 2- < 10 mmol/l
Drain                        free flowing
Reagents
Number
Storage temperature
Consumption per analysis
Reagent volume
Number of analysis (ca.)
1
0 – 30°C
ca. 0,2 ml
500 ml
2500
Analysis
Duration (ca.)
Break
3 – 15 min incl. Flushing
dependent on hardness
1 – 99 min
Order Information
Model Order No.
AQUACON RH 690 2705 01
Reagents Order No.
Titrant RH B2300 500 ml
5000 ml
101 2705 01
101 2705 02
Buffer reagent 1 (for high carbonate concentrations) 500 ml
5000 ml
101 2705 03
101 2705 04
Buffer reagent 2 (for high iron concentrations) 500 ml
5000 ml
101 2765 03
101 2765 04
Options Order No.
Enclosure made of glass-fibre reinforced Polyester 125 0010 01
Second dosing pump for buffer solution
Control-valve for adjustment of sample flow
125 0011 01
125 0014 01
Working principle:
Complexometric titration of earthalkali
ions with a titrant / indicator /
buffer solution.