Cobolt Speechmaster Sensa Instructions Before using the "Sensa" make sure that the raised portion on the top is fully depressed with your finger. Press the Sensa down on to the rim of the empty glass, cup, mug etc. with the probe inside, until the probe reaches the bottom of the container. The small area on the top will then rise by the appropriate amount to adjust to the height of the vessel being used. Proceed to add the first amount of liquid to the vessel, i.e. milk, gin etc. When you hear the tone cease pouring. The first tone will stop after several seconds. Top up with the required liquid until the tone is heard again. Cease pouring. This second tone will continue until the Sensa is removed from the liquid. After use, wipe the probe but DO NOT IMMERSE THE SENSA IN WATER. Modified 18/03/2020