Patent ID: 9568375
Date: 2017-02-14
CPC Classifications: F28G,G01K,G01N

Claim:
1. A method of detecting fouling or scaling of a heated wetted test surface comprising heating a conductive block using a heater; said conductive block having a first end comprising said heated wetted test surface, and a second end opposite said first end; contacting said heated wetted test surface with a first liquid; measuring the temperatures at first and second positions along said conductive block wherein said first position is closer to said heated wetted test surface than said second position to obtain first and second temperature measurements; comparing first and second temperature measurements at said first and second positions to establish a reference temperature difference with no fouling or scaling on said heated wetted test surface; determining fouling or scaling on said surface by subsequently measuring temperatures at said first and second positions and detecting changes in temperature differences between said temperatures at said first and second positions relative to said reference temperature difference.