Compact and rugged, the DR58 heated diode Refrigerant Leak Detector helps you find leaks fast in the field. Its heated diode sensor detects all HFC, HCFC, CFC, HFO and blends. Multiple indicators and sensitivity 20X higher than soap bubbles make it easy-to-track down even the smallest leaks in various environments. A red LED flashes at the tip so you can keep your eyes on the target. The large bars on the backlit LCD are easy-to-see in bright sunlight or low light and the numerical value provides an extra digit of resolution. Unlike conventional leak detectors, you have full control with both an automatic (AZERO) and manual (MZERO) zero mode. The large lithium-ion rechargeable battery provides over 18 hrs of continuous operation and is convenient to charge via USB-C. Replaceable tips filter out water and dust while getting into tight spots. All wrapped up in a ruggedized IP54 housing, it's built for the field.