The SDT HATCHecker is an ultrasound solution designed to test the integrity of vessels for weathertightness. FREE SHIPPING*

When Hatch Cover Tightness Matters

The HATCHecker is an ultrasound solution designed to test the integrity of vessels for weathertightness. Use HATCHecker to pinpoint the exact location of leaks in hatch covers.



    The ergonomic and revolutionary design, vibrant color display and limited number of keys make the SDT HATCH checker easy to use, handy for travelers and allows for reliable leak detection with pinpoint accuracy on board ships.


  • Focused

    Confirm that hatch covers are weathertight and compliant with ruling regulations by using the new SDT HATCHecker which includes cutting edge technology that makes both the T9 transmitter and handheld receiver light, compact, robust and suitable for use in the harsh marine environment.


  • Affordable

    SDT’s renowned quality and engineering, together with pioneering design and competitive price setting make the SDT HATCHecker the most suitable and affordable solution for dealing with leaky hatch covers.


  • Included with HATCHChecker system:

    SDT HATCHecker Receiver

    Battery Alkaline 1,5V AA, 2 Pack

    FLEX2 Flexible Airborne Sensor, 16mm Tip, w/o Cable

    Cable For Sensor, Lemo to Lemo, Coiled

    Extension Pole For Airborne Sensors

    T-Sonic9 Ultrasound Transmitter

    T-Sonic9 Rubber Holster, Magnetic

    Battery Alkaline 1,5V AA, 6 Pack

    Remote for T-Sonic9, Bluetooth

    Shoulder Strap

    USB Cable

    Headphones, Neckband

    USB Cable

    Screwdriver For Battery Cover

    HATCHecker Custom Carrying Case, Black Latches


Sherlog reporter app for Android devices allows you to:

  • Create a survey for a specific ship and type of hatch cover.
  • Perform your on-site functional test and log test results.
  • Indicate leaky areas, whether spots or linear leaks, on dedicated hatch cover, window or door formats.
  • Assign one or more photographs to leak sites.
  • Synchronize your survey with the web platform.
  • Send or share your final hatch cover test report with principals or colleagues in real time.
  • Log-in to the SDT web platform to manage your surveys.


Contact us for more information.

*FREE ground shipping in the continental US.

SDT340 Ultrasound tool(Opens in a new browser tab)

Additional information



Tech Specs

Function Ultrasound measurement device
Display 160×128 pixel Color OLED
Keyboard 5 function keys
Typical measurement range -6 to 99.9 dBμV (reference 0 dB = 1 μV)
Resolution 0.1 digits
Measurement bandwidth 35 to 42 kHz
Signal amplification +30 (built-in sensor gain) dB to +102 dB by step of 6 dB
RMS period time 250 milliseconds (main screen) / 3 sec (bar graph)
Sampling frequency 64 kHz
ADC Resolution 12 bit
Minimum sensitivity -31dB (@40 kHz, 0 dB-1 V/µbar)
Operating temperature range -10 to +50 °C |14 to 122°F
IP rating IP42
Standards EN 61326-1:2013, EN 55011:2016 + A1:2017, EN 61000-4-2:2009, EN 61000-4-3:2006 + A1:2008 + IS1:2009 +A2:2010
Housing material ABS
Dimensions housing 158 x 59 x 38,5 mm |6.22” x 2.32” x 1.51”
Flexible rod length (Removable sensor) 445 mm |17.51”
Weight 350g | 12.35 oz
Battery/Utility connector USB Mini-B 5-pin
Battery 2 AA batteries
Autonomy 7 hours
Operable with SDT provided head set only
Maximum audio output (protection) +83dB SPL with SDT headset
Headset 25dB NRR Peltor HQ headset
Warranty Lifetime


TRAPChecker Brochure

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