TPI SAIT25 - Analog Insulation Resistance Tester Large 50,000 count display increases resolution and improves accuracy (1.7" x 2.75", 43mm x 70mm) 0-24mA output for process controls Triple Display shows more than one reading simultaneously 51 Segment Analog Bar Graph to catch fast AC fluctuations Back Light (LED Type) allows viewing in any light condition Auto Range automatically selects the best range for the measurement TPI Insulation Resistance Testers are ideal for preventative maintenance and performing resistance tests. All TPI Insulation Resistance Testers include A085 UL listed silicone test lead set with screw on alligator clips and A073 test lead set with large alligator clips.