With an increasing effect of global warming, drinking water suppliers are confronted with hotter water at abstraction points (e.g., surface water from rivers, lakes, wells) as well as in the distribution network when transported to the tap. In certain areas water is stored in elevated reservoirs where especially hot temperatures during summer warm up the water before it is supplied to the end customer. But what effect does increased water temperature have?
The maximal cold water tap temperature cannot exceed 25°C (DIN EN 806-2:2005). While this value is not mandatory by drinking water regulators it is a typical value for cold water applications when hygienic tests are performed (e.g., KTW, WRAS). Microbial growth increases exponentially with temperature. The solubility of dissolved gases decreases with increasing temperature. Therefore, water temperature provides important qualitative information about water quality.
For this reason, Sigrist has upgraded the AquaScat S and introduced a temperature sensor embedded in the sensor head. With this feature Sigrist offers the customer an additional measurement parameter which can be used for qualitative statements about the water quality as mentioned above. Together with the high precision turbidity measurement one instrument gives the operator the possibility to map out the water quality in a semi-quantitative manner without expensive analysis equipment. The high accuracy of the Sigrist instrumentation can detect smallest changes in the water turbidity.
A crucial benefit is the measurement of turbidity with zero water loss across the entire drinking water treatment process.
|Turbidity||0 … 4000 FNU|
|Temperature||0 … 60 °C|
|Limit of detection|
|turdidity||0.006 ... 0.008 FNU|
|(physical limit of pure water)|
|Power supply||24 VDC ± 10 %|
|consumption||max. 2 W @ 20 °C|
|Dimensions||Ø 40 x 200 mm|
The AquaScat S measures turbidity according to ISO7027. This is either achieved by submersing the probe directly into a catchment or by installing it in a pipe. Customers value its high precision and the variety of installation and interface possibilities.