Text this: Classification of pH Levels using a mobile phone

 _    _    _    _     ______    _____     ______  
| || | || | || | ||  /_   _//  |  ___||  /_   _// 
| || | || | || | ||  `-| |,-   | ||__      | ||   
| \\_/ || | \\_/ ||    | ||    | ||__     _| ||   
 \____//   \____//     |_||    |_____||  /__//    
  `---`     `---`      `-`'    `-----`   `--`