The Tracerline TP-9365 PRO-Vac vacuum/micron gauge, with a technologically advanced Pirani sensor, accurately displays the vacuum level at every stage in the evacuation cycle, from atmosphere down to one micron, its maker said. Users know instantly if the connections are tight. It features a large bright LCD that can display readings in microns, Pascal or millibars. Additional features include a low-battery warning indicator, automatic shutoff to conserve the battery and an inline filter to protect the sensor from contaminants, the company added.