Can low-cost and readily available water quality testers accurately map pollution levels in Indian rivers?

Image Guidelines:

1. Eliminate extraneous text or cover device specifications to focus solely on desired values in the image
2. Minimize reflections and shadows for clear visibility of the TDS meter and its values.
3. Choose a background and text colour unique to the image to avoid confusion with other elements.
4. Ensure centralized and clear positioning of the text with the TDS values in the
image.
5. Use appropriate lighting to avoid glares or dark shadows that may obscure the TDS meter readings.
6. Maintain focus and clarity of the photograph, ensuring legibility of the TDS meter text.
7. Remove background distractions that could divert attention from the TDS meter or values.
8. Capture the entire TDS meter, including relevant indicators, buttons, and screens.
9. Follow a consistent format for photographing TDS meters, including orientation and composition.
10. Avoid unnecessary digital alterations unless required for visibility or artifact removal.
11. Document additional information such as date, time, location, and relevant
observations if possible.