Elitech ILD-100 HVAC infrared leak detector comes in kit form in a rugged, blow-mold case with all of the extras. Elitech infrared refrigerant leak detector is designed exclusively to make the HVAC/R technicians' job easier, faster, safer and more efficient. We set out to develop the best referigerant ac sniffer for HVAC/R. The six-hour battery life lets you to work the way you want to work. This infrared leak tester allows it to detect even the most difficult ones like R-134a, R-404A, R-407C and R-410A and 1234yf refrigerants. Our exclusive solid electrolyte sensor technology reduces heat and give the sensor longer life than traditional heated diode or corona detectors.