CS Instruments Leak Detector LD 450

If gases escape through leaks in pressurized pipe systems (e.g. non-tight screwed connections, corrosions and so on), ultrasonic noises are generated.


If gases escape through leaks in pressurized pipe systems (e.g. non-tight screwed connections, corrosions and so on), ultrasonic noises are generated. By means of LD 450, even the smallest leakages which cannot be heard by the human ear and which are not visible due to their size can be detected even from distances of several meters. LD 450 transforms the inaudible signals into a frequency which can be identified by human beings. By means of the comfortable soundproof headset, these noises can be detected even in extremely noisy environments.

The LD 450 leak detector is the advancement of the proven LD 300 and LD 400 and it impresses with its significantly refined sensor technology and its improved support in the tracing of leaks. By means of the integrated laser pointer, which serves for target heading, the leak can be localised more accurately. Through the use of a specially designed acoustic trumpet, a better bundling of the sound waves is achieved. This trumpet acts like a directional microphone, which bundles ultrasonic waves and thus improves the acoustic behavior. Due to the special design of the acoustic trumpet, the use of the laser pointer is not hindered.

The LD 450 meets the requirements of class I instruments for the norm “Standard Test Method for Leaks with Ultrasound” (ASTM Int. – E1002-05)


CS Instruments

CS Instruments

CS Instruments GmbH & Co. KG with locations in 24955 Harrislee and 78052 Villingen-Schwenningen/ Tannheim, is managed by Dipl. Eng. (FH) Wolfgang Blessing as sole Managing Director.

CS Instruments GmbH was established in the year 2002 by Christian Schuldt and Wolfgang Blessing as equal shareholders/Managing Directors.

Wolfgang Blessing already was sound a specialist on the sector of compressed air technology resp. industrial measurement technology long before the establishment of CS Instruments GmbH in the year 2002. Prior to the foundation of CS Instruments GmbH Dipl. Ing. (FH) Wolfgang Blessing acted for more than 10 years as primarily responsible product manager for industrial measurement technology at a worldwide known manufacturer of measuring instruments for compressed air and gases in the Black Forest. The technical knowledge and experience matched with the long-term practical knowledge was the corner stone for the success of CS Instruments.


  • Robustness and low weight ensure fa- tigue-free use in industrial environments
  • Improved detection of leakages with the acoustic trumpet
  • Modern Li-Ion battery with high capacity, external charger
  • Minimum operating time 10 h
  • Easy operation via membrane keypad
  • Adjustable sensitivity


  • Compressed air, gas and vacuum systems
  • Door seals


  • Operating frequency: 40 kHz ± 2 kHz
  • Connections: 3.5 mm stereo jack for
    Power supply socket for
    connecting an external
  • Laser: Wavelength:
    645…660 nm
  • Output power: < 1 mW
    (laser class 2)
  • Operating time: 10 h
  • Charging time: approx. 1.5 h
  • Operating temperature: 0 to 40 °C
  • Storage temperature: -10 °C to 50 °C

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