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Professional SL800 ultrasonic detector set
  1. Products & Services
  2. Measuring devices
  3. Ultrasound
  4. Ultrasound measuring instruments
  5. SL800

Ultrasound measuring instrument SL800

Quick and economic detection of compressed air leaks

Complete set with exchangeable probes and ultrasonic transmitter

With this professional ultrasonic detector set you can locate leakages in compressed air supply networks, plant systems and at concealed pipelines quickly and inexpensively without contact even from a distance of several metres.

In case of leaking gas even a tiny point of leakage in the compressed air line is sufficient and leads to increased friction, generating a sound inaudible for humans in the ultrasonic frequency range.

Wear abrasion at movable machine parts becomes noticeable in the same way.

These sound vibrations caused by flow friction are received by the probe of the SL800R and transformed into audible sound by way of high-performance transducer technology, which can then be played over soundproof headphones and additionally displayed as indicator value via a 10-piece LED bar graph.

The combined visual and audible detection with adjustable headphone volume permits focussed working even in poor lighting conditions and noisy surroundings.

To test the tightness of pressureless systems such as tanks, containers or climatic chambers and ventilation systems, these system can be subjected to ultrasound using the SL800T transmitter, which is also included in the set.

This ultrasound measuring instrument is supplied as a complete set with exchangeable probes and ultrasonic transmitter:

Included in this set are the ultrasonic detector SL800R and the ultrasonic transmitter SL800T – both delivered ready for use incl. batteries – an airborne and structure-borne sound probe each for the SL800R and soundproof headphones with volume control – all fitting into the carry case.

This variety of potential applications is made possible by ultrasonic detection using the SL800 set:

SL800R with structure-borne sound probe

SL800R with structure-borne sound probe
  • Early detection of wear at ball, roller or slide bearings
  • Checking centrifugal pumps for cavitation
  • Tightness tests of fittings
  • Continuity testing or functional check of steam traps

This probe utilises structure-borne sound as bearer of inner states and processes. Hence, the device combination works like an electronic stethoscope.

SL800R with airborne sound probe

SL800R with airborne sound probe
  • Leak detection at exposed lines and pipes
  • Proving the leakage-related loss at gas-filled supply networks also during operation
  • Leak detection at high-pressure steam installations
  • Localisation of cracks, poor weld seams or worn flange connections
  • Leak detection at all accessible fittings and connecting elements where processes take place in a vacuum or at high pressure

SL800R with airborne sound probe and ultrasonic transmitter SL800T

Ultrasonic transmitter SL800R
  • Tightness testing to determine the cause of energetic defects, e.g. at doors or windows
  • Checking containers, housings or climatic chambers for tightness
  • Subjecting tanks or containers to ultrasound so as to test sealing components
Signs of wear at pumps and other processing machines can be detected at an early stage using the structure-borne sound probe.
Wear detection using structure-borne sound probe
Combined with the ultrasonic transmitter SL800T, tightness tests of e.g. fire doors can be performed quickly and at low cost.
Leak detection using airborne sound probe

Model calculation for leakage losses in compressed air systems

Large amounts of air permanently stream out at high speed even through the tiniest leaks in compressed air systems, resulting in considerably higher operating costs:

Leak dimensions Escaping air volume at 8 bar Energy loss**
[ø mm] [l/min] [l/annum]* [kWh/a]
1 75 39,420,000 5,125
2 260 136,656,000 17,765
3 600 315,360,000 40,997
4 1,100 578,160,000 75,161
* If operated 24 hours a day throughout the year.
** Owing to the additionally required motor power (0.13 kW per m³ of compressed air) for a higher volume flow to compensate the pressure loss.
Quick tightness testing of buildings

Quick tightness tests at parts of a building or other sealing components

For tightness tests at regular doors and fire doors or windows the ultrasonic transmitter SL800T can simply be installed behind the test object. Ultrasound emerging in front of the object then indicates the point of leakage.

A few practical benefits:

  • Development, design, production: 100 % Trotec
  • Simple detection of the smallest leaks and leakages
  • Pinpoint leak detection by high-performance sound transducer technology
  • Cost-effective leak detection at compressed-air lines as well as steam, gas and vacuum systems, boilers, liquid-bearing pipes, valves, sliders, steam traps
  • Reliable early detection of damaged plain and roller bearings or of other noises of wear
  • Airborne and structure-borne sound probe for a large variety of different tasks
  • Safe detection even in noisy surroundings by high-performance, soundproof headphones
  • Easy handling

 standard equipment

 optionally available

 not available


SL800 Ultrasound Measuring Instrument show in Trotec online shop

SL800 Ultrasound Measuring Instrument

You save: 80.00 £

299.95 £ 219.95 £ incl. VAT Show net price (VAT not included)


Technical data

Technical data
General information
  Article number 3.510.002.000
Ultrasound [digits]
  Receiving frequency 36 – 44 kHz
  Transmission frequency 40 kHz
  Functional LEDs
  10-stage LED bargraph
Device control
  Push buttons
Housing design
  Headphone connection 3.5 mm jack
Power supply
  Battery type 2x 9V battery
Ambient conditions
  Operation - min. temperature [°C] 0
  Operation - max. temperature [°C] 40
  Storage - min. temperature [°C] -10
  Storage - max. temperature [°C] 50
  Length (packaging excluded) [mm] 430
  Width (packaging excluded) [mm] 325
  Height (packaging excluded) [mm] 120
  (packaging excluded) - batteries included [kg] 1.64
Equipment, features and functions
Internal sensors
  Ultrasound [digits]
Functions and features
  Headphone connection
  Variable volume control
Standard scope of delivery
Standard scope of delivery
  Structure-borne sound probe
  Airborne sound probe
  Headphones, 3.5 mm
  Getting started guide
Ascertainable measured values and functions
Internal sensors
  Ultrasound [digits]
Functions and features
  Headphone connection
  Variable volume control

 standard equipment

 optionally available

 not available