The SDT TRAPChecker is an ultrasound solution designed to assess the condition of steam traps and valves. FREE SHIPPING*


The SDT TrapChecker is a specialized ultrasound tool meticulously crafted to detect internal turbulence caused by faulty steam traps and malfunctioning valves within your steam system.


  • Streamlined

    Inefficient steam systems not only waste energy but also compromise product quality. The SDT TrapChecker is a precise ultrasound solution engineered to pinpoint failed steam traps across various styles and failure modes, ensuring optimal system performance.


  • Effortless

    Using the TrapChecker is a breeze. Simply unbox the device, connect the sensor, and instantly discern the distinction between a well-functioning and a defective steam trap. Its vivid color display offers dependable, precise digital measurements, making assessment effortless.


  • Cost-Effective

    Up to 40% of your steam traps may be operating in a state of disrepair. With the TrapChecker’s affordable initial investment and the considerable cost of energy, your expenditure on this tool could be recuperated after just one use, making it a cost-effective solution.


The SDT TrapChecker: Your Ultrasound Solution for Steam Trap and Valve Condition Assessment.


The TRAPChecker system includes:

SDT TRAPChecker Receiver

Battery Alkaline 1,5V AA, 2 Pack

3.2″ RS2N Contact Sensor, Needle, w/o Cable

Cable For Sensor, Lemo to Lemo, Coiled

Headphones, Neckband

USB Cable

Screwdriver For Battery Cover

SDT915 Custom Carrying Case



Contact us for more information.

*FREE ground shipping in the continental US.

SDT LubExpert 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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