Description The Sentry 19070 series testers are compact, lightweight and low cost. Its compact size is easy to move around the production floor and the large LCD display makes viewing measurement results easy. These high value Hipot Testers are most applicable to safety testing electronic components. The Sentry 19070 Hipot Tester series provides 2 models to choose from. The Sentry 19071 for AC Hipot testing; and the Sentry 19073, which combines both AC and DC Hipot with insulation resistance (IR) measurements into a single compact unit.