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Rotogages® are designed to provide an accurate determination of LPGas or anhydrous ammonia container contents. They mount in a standard 1” NPT coupling on large mobile or stationary containers.
To operate the Rotogages®, the vent valve is opened and the dip tube rotated slowly from the container vapor space to the liquid space. The difference in appearance of the discharge indicates when the liquid level is reached. Dial readings then indicate the percentage of product in the container.