The DG-2plus is an upgrade of our original, compact digital ohmmeter. Still capable of safely measuring live bridgewire and firing line resistance from 9.99K ohms (3 auto-ranges: 1.0 to 9.9 Ohms; 10 to 999 Ohms; and 1.00K to 9.99K) – but now self-calibrates at every Power-On. Instantly know if your EBCs and firing lines are good, with the new, triple, high-accuracy, digital measuring circuits that display results in real time. Housed in a non-sparking enclosure (including brass contacts) and completely sealed, it is safe for flammable atmospheres.