CTRL Systems designs ultrasound detectors for leak detection and numerous other applications. CTRL designed the Leak Detector App to provide you the opportunity to experience what it would be like to use an ultrasound detector to find compressed air & gas leaks.

The Leak Detector App for your Android phone utilizes your phone's built in microphone to listen for high frequency sound in a narrow band around 20 kHz, then plays it back at lower frequencies.

Use & Operation

  1. Click "Listen". 
  2. Adjust the sensitivity up/down, depending upon your needs and environmental noise level
  3. Click "Stop"


The Leak Detector App is limited by the hardware in your phone. Do not expect the same results in sensitivity, signal-to-noise ratio, quality of sound, etc. that you would expect in the CTRL UL101. This app is designed to provide you with the opportunity to experience a very scaled down version of what it would be like to use an ultrasound detector to find leaks in a noisy environment. 

Contact CTRL Systems, Inc. for more information regarding the Leak Detector App
+1 (410) 876-5676 

Check out the CTRL Leak Detector App for Android from the 

Google Play Store 


Do you need real results?

CTRL is the designer and manufacturer of the CTRL UL101 Ultrasound Detector, a ruggedized device for maintenance and reliability.  CTRL Ultrasonic Leak Detector for Pressure and Vacuum Leak Detection

UL101 Ultrasound Detector Benefits


Finds all turbulent flow leaks
Most sensitive detector on the market today for compressed air/gas, vacuum, valve, etc. leak detection.

Easier to use
Turn the receiver on, adjust sensitivity, and begin testing.

Does not require calibration
Begin testing immediately. There is no need to calibrate or routinely send back to the factory.

Longer battery life
A single, 9-Volt battery powers the receiver for more than 45 continuous hours.

Complements vibration analysis or infrared
Add the UL101 to your predictive maintenance routines for instant feedback.

Designed for a wide range of applications
Leak detection, mechanical & rotating equipment tests, electrical arcing & corona discharge detection

Standard or intrinsically safe models
Intrinsically safe models can be used in explosive atmospheres:
ANSI/UL 91 3-88, for DIVISION 1, CLASS I, Groups A, B, C and D, CLASS II, Groups E, F, G and CLASS III .
It also complies with DIVISION 2, CLASS I, Groups A, B, C and D, CLASS II , Groups F, G, and CLASS III

CTRL UL101 Ultrasound Detector