DHT-400 High-Temp Transducers

DHT-400 High-Temp Transducers are general-purpose sensors for measuring the remaining wall thickness on rough metal ID and OD surfaces due to corrosion and/or erosion. These transducers can be used intermittently (50% duty cycle) over a wide temperature range from 0 to 932°F (-17.8 to 500°C) and continuously from 0 to 400°F (-17.8 to 204°C) depending on the transducer.

Typical applications include its use with common digital thickness gauges or flaw detectors on boiler/furnace tubes, pipes, tanks, vessels, structures and other safety-critical components at power plants, refineries, mid- and up-stream oil & gas assets, and chemical facilities.

Typical Applications

• Thickness gauging on rough or corroded surfaces
• For applications up to 932°F (500°C)
• Thickness gauging on pitted, curved, and irregular surfaces 

DHT-400 Series High-Temperature Transducers

Backwall Signal from 1″ Steel Block

DHT-410

RF Waveform Image (Left) and Frequency Spectrum (Right)

Thermal-Cycle Testing

DHT-400: 400°F Heat Up at 932°F

 

 

 

 

DHT-410: 200°F Heat Up at 300°F

 

 

  At 300°F continuous surface contact temp, it takes over 9 minutes for the sensitive solder joints within the transducer to get to 200°F.