Model TK-DL Backflow Preventer Test Kit with Download Capability is a compact portable device made for testing pressure vacuum breakers, reduced pressure zone assemblies, and double check valve assemblies. The TK-DL replaces both pressure and differential test gauges featuring powerful microprocessors and a compact size. High-side, low-side and differential pressure are continuously displayed and recorded in the unit’s 32K memory. Model TK-DL also provides printed, on-site documentation, recording time, date, and verified test results. The TKDL hold 50 three-minute tests in its memory (or 75 shorter tests) which allows you to access and print your records whenever you like or transfer the data to your computer for permanent storage. Model TK-DL self-calibrates prior to each test and provides +/- 0.2% accuracy in addition. The TK-DL is backed by a full one year warranty.