• Sensitivity better than 0.03 oz/yr (1g/a)
• Bright, LCD screen with easy-to-see bar graphs and numeric readings
• 18-hour USB rechargeable lithium-ion battery
• Detects all HFC, CFC, HCFC, HFO and blends
• Flashing lighted tip, multiple alarms, and numerical leak size indicator

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 Li-ion re-chargeable battery provides over 18 hours 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.

1. Status Bar (Sensitivity, Mute, Battery)

2. Numerical Leak Size Indicator with Bar Graph

3. Message Line

4. Lighted Tip

5. Speaker

6. Charging Port

Zero Modes (AZERO/MZERO)

DR58 starts up in automatic zero mode (AZERO) which sets a new zero point every two seconds, indicated by AZERO blinking twice.

Moving closer to the leak source will show the relative increase in concentration, triggering the alarm. Conversely, stopping at or moving away from the leak source will not trigger a response.

Press MANUAL/AUTO >1 second to toggle manual zero mode (MZERO). DR58 does not zero automatically while MZERO is displayed and will continue to alarm and display the relative leak size.

Zero Set

Press ZERO to manually set the currently measured concentration to 0, indicated by AZERO/MZERO blinking twice.

Numerical Leak Size Indicator with Bar Graph

The number is the relative concentration of refrigerant gas (0-99 units). The bar graph shows the same measurement in steps of 10 units for easy monitoring. The higher the number, the higher the concentration of gas being measured and the closer you are to the exact leak location.

Maximum Mode

Press MAX ON/OFF >1 second to toggle max mode. When max mode is on, the highest leak size detected is continually recorded.

The recorded max is cleared when the sensitivity is changed or if manually zeroed.

Sensitivity (H/M/L)

DR58 starts up in high sensitivity (H) which is recommended for most situations. When leaks are difficult to pinpoint due to excess triggering or sensor saturation, press SENSITIVITY to cycle to a lower sensitivity (Medium/Low).

In most situations, the red LED at the tip is easier to monitor than the display. Because the blink rate increases as the relative concentration increases, many leaks can be found without ever viewing the display.

The chart below provides an overview of the features and differences of the Fieldpiece DR82 and DR58.