The LST 650 will test Load Switches used in NEMA TS1, NEMA TS2 and Caltrans cabinets.

The ASPT 5300 will test the 2202-HV HDSP/FU used in ATC Cabinets. Currently, ATSI does not manufacture a Low Voltage (DC) HDSP/FU tester. If you are in need of a low voltage tester, please click the link to "Contact Us" on the top of this page.

If you are looking for calibration or repair service, please click the link to "Schedule Service" on the top of this page.