Lawler heated tube baths conform to the specifications of ASTM D381 test method. These are used for the determination of existent gum in fuels by the air-jet as well as the steam-jet procedure. The operating temperature range is 100° to 250°C with the temperature stability of ±1°C.

Lawler baths are unique in that they use individually heated and temperature regulated heated aluminum tubes. This configuration reduces the uncertainty and possible temperature non-uniformity of conventional single large aluminum block baths. Such improved precision should lead to improved precision of results.

In addition, each test position has its own pressure regulator and gauge for controlling the flow rate of either the air or steam. This allows the starting the testing of new sample while other sample tests are in progress.

The heated tube concept allows the operation of widely different temperatures at any position. For example, one tube can operate at 160°C and its neighbor at 240°C.

In the conventional designs the test positions are arranged in a circle. In this case the operator is exposed to very hot components when reaching to the back positions. The test positions of the Lawler baths are arranged in a line (from left to right) so that each position is as easy to reach as another with obvious safety benefits.

With the -RL option the operator is able to remotely disconnect the goose neck pipe and the attached funnel from the air or steam line. Furthermore, the goose neck pipe and the attached funnel can be lifted remotely without the operator coming in contact with the hot pipe. This feature improves the operator safety reducing exposure to the hot air or live steam.

The -JC option offers for each test position an independent selector for either air jet or steam jet. This selection allows the simultaneous and independent operation at each test position for either the air-jet (for gasoline) or steam-jet (for turbine fuel) method. This allows the testing by the air-jet method in one position and by steam-jet method in the neighboring position.

Model 380-3 has 3 test positions but requires an external steam super heater for turbine fuels.

Model 380-5 is the same as Model 380-3 but with 5 test positions.

Model 382-3 is similar to Model 380-3 but with addition of an integral steam super heater.

Model 382-5 is similar to Model 380-5 but with addition of an integral steam super heater.

Specifications subject to change without notice.