Honest Phil

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Description
Honest Phil is an inexpensive, simple yet sophisticated sticker that is applied near the neck of a scuba tank in order to promote a slower air fill. The sticker has temperature sensitive ovals that turn clear as the tank heats up- such as immediately after a rapid air fill. A thermometer range on the left side of 'Phil' allows you to note the tank's approximate temperature (in 5° F/3°C increments). The higher the temperature, the more ovals will clear. The visible number within the highest clear oval is the approximate pressure drop you can expect when the tank returns to room temperature (70° F/21°C). The slower a tank is filled, the less of a temperature increase there is. The less the temperature increases, the more air you have for your dive!