MESTEK Halogen Leak Detector HD01 gives HVAC and refrigeration professionals precise detection of halogenated refrigerants, including HFC, HCFC, CFC, PFC, HFO, and compatibility checks for R717 systems. It measures 0–1000PPM with dual sensitivity settings (50–1000PPM in high mode and 500–1000PPM in low mode), and it quickly locates leaks with a diffusion sampling method that responds in less than 10 seconds. The detector identifies R22 and R134a leaks at a maximum sensitivity of 0.5 ounces per year, while the color screen, audible alarm, and analog indicator make results clear in any environment. Halogen Leak Detector HD01 offers a 30-second preheating calibration, temperature measurement from -10°C to 60°C with ±1.5°C accuracy, and automatic shutdown after 10 minutes, providing a portable and reliable tool for inspections and preventive maintenance.