The SPX RD547 control unit from Radiodetection Corporation enables the water leak specialist to use both acoustic and tracer gas methods for the location and pinpointing of leaks. The three acoustic devices available include a universal microphone that comes with a range of attachments, making it suitable for fittings or ground measurements; a ground microphone with a windproof shield and lower frequency capability optimized for outdoor use; and a test rod with extendable tips and rigid handle that allow measurements to be taken on deeper-set utility fittings. Users can choose from a range of predefined filters or set their own for fittings or ground measurements. When tracer gas is a better option for leak detection, a ground sensor for the detection of hydrogen can be attached. 877/247-3797; www.radiodetection.com.