Robinair TIFXP-1A Automatic Halogen Leak Detector Robinair's Halogenated Refrigerant Leak Detector features innovative Microprocessor Controlled Circuitry and Advanced Digital Signal Processing that monitor the sensing tip up to 2K times/second Auto reset, true mechanical pump that provides positive airflow thru the sensing tip, and tri-color, 6-segment visual leak size indicator, displaying 18 alarm levels, speeds & simplifies leak searches Completely re-designed sensing tip - on a 14 inch long (35.5 cm) flexible stainless steel probe with liner - increases sensitivity, improves reliability, and lasts twice as long as it's predecessor Features: variable frequency audible alarm, constant power indication, cordless, battery powered operation on 2 C-cell batteries, and carrying case Certified to SAE J1627 standards with CE approval and UL classification