... lies in the sensitivity of nano-materials to the refrigerant. JIANGSU JINGCHUANG ELECTRONICS CO., LTD -- Elitech Paypal ... and its frequency changes aloong the leakage densityTechnical parameters:Detecting Gas: R22,4134a, R407c, R404a, R410a, R507(AZ-50) ... 10sDisplay: Seven and dual-color LED indication; red indicates refrigerant leakage amount; blue indicates the sensitivity levelAlarm: The shorter ...