DY26A is designed to locate leaks in pressure and vacuum systems. It can be used to detect and locate the source of ultrasonic emission generated by gas or liquid flowing through a small restrictive opening. It uses advanced ultrasonic detection technique and features small size, light weight reliable detection, easy to use and useful. br /andgt Comes with a transmitter that emits ultrasonic frequencies to help locate an unpressurized belt.Sufficient to emit frequencies that the detector can pick up. (DY26 only) Detects all pressurized leaks including chlorofluorocarbons (CFCs), hydrofluorocarbons (HFCs), nitrogen (Ni), carbon dioxide (CO2) and steam. >High and low adjustment according to the detected environment.Specification:Alarm indication: LEAK LED lights up and tick frequency increases.Response Frequency: 40kHz 2kHzOperating Conditions: Temperature: 0C-40CRelative Humidity: 80 percent Battery: 9V, 6F22 or equivalent (not included)Size: 171 x 43 x 38mm / 6.7 x 1.7 x 1.5inchWeight: about 240g / 8.5ouncePackage size: 200 x 70 x 70mm / 7.9 x 2.8 x 2.8inPackage Weight: 551g / 19.4ouncePacking List:1 x Leak Detector ultrasonic1 x helmet