Fieldpiece DR58 Heated Diode Refrigerant Leak Detector

The Fieldpiece DR58 is an advanced diagnostic tool for locating refrigerant leaks in HVAC/R circuits. Its heated diode sensor delivers excellent sensitivity (better than 0.03 oz/year — approximately 1 g/year) and can detect all major refrigerants including HFC, HCFC, CFC, HFO and blends. The detector is also compatible with A2L refrigerants.

The bright backlit LCD display provides easy-to-read bar graphs and numeric readings, while dual audible and visual alarms help guide the operator to the source of the leak. A built-in LED illuminated tip assists in finding leaks in dark or noisy environments.

The unit is rugged and certified with an IP54-rated body that resists impact and field conditions. USB-rechargeable lithium-ion battery provides up to 18 hours of runtime, and both automatic and manual zeroing functions allow full control during leak detection.

• Heated diode sensor specifically designed to detect very small refrigerant leaks

• Maximum sensitivity better than 0.03 oz/year (≈ 1 g/year) when stationary, and ≈ 0.1 oz/year when in motion

• Detects HFC, HCFC, CFC, HFO refrigerants and their blends, including A2L compatible refrigerants

• Backlit LCD display with easy-to-interpret progress bars and numeric readings

• Visual and audible alarms to indicate presence and severity of leaks

• LED illuminated tip to assist in locating leaks, even in hard-to-see areas

• Automatic and manual zeroing functions to calibrate baseline readings

• Rechargeable internal battery (3.7 V, approx. 2550 mAh) with typical runtime up to 18 hours (backlight off)

• Auto power-off after about 10 minutes of inactivity

• Ergonomic, compact body with IP54 certification for water and dust resistance

• Leak response time < 1 second; recovery time < 10 seconds

• Sensor life typically around 300 hours

• Weight approx. 400–500 g (lightweight and easy to handle)

• Locating refrigerant leaks in air conditioning and refrigeration systems

• Leak detection in both residential and commercial HVAC/R installations

• Professional use by service technicians

• Detecting small leaks even in hard-to-reach or dark areas