How does a pulsed bubbler differ from a continuous flow bubbler?
Both bubblers work off the same hydrostatic principle. They measure the level of a liquid by measuring the air pressure required to blow air bubbles out of a sense line that is inserted into the tank. Continuous flow bubblers generate a constant flow of air in the sense line to make bubbles. For maximum accuracy the air flow rate must be greater than the fastest rate of anticipated level change. The pressure reading is then calculated into a level measurement. Continuous flow bubblers accuracy is dependent on the integrity of the system. If the sense line gets plugged, the air pressure changes or a leak develops somewhere in the system, a continuous flow system will continue to give you a reading although and it will be in error. The LC-100 pulsed bubblers function by sending a purge of air into the sense line and into the tank. In normal operations the LC-100 automatically performs a sensor zero check every half hour. The sense line is automatically purged at regular intervals to keep
