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Echo 8 HT High Temp UT Couplant

Original price $0.00 - Original price $0.00
Original price
$0.00 - $0.00
Current price $0.00

The Echo 8 HT High Temp UT Couplant is a line of high-temperature, slow-drying ultrasonic fluids with an excellent safety profile that is compatible with all metals and most plastics.

This couplant has 3 different viscosity grades: 1, 4 and 10. It performs on a broad range of AUT and MUT ultrasonic flaw and thickness gaging applications from -50°F to 800°F (-45°C to 425°C).


  • Grade 1: is the lowest viscosity fluid (100 cST) for long or small diameter lines and quick spreading.
  • Grade 4: is the standard viscosity fluid (400 cST) and is usually a good compromise between pump ability and run-off at the transducer.
  • Grade 10: is a very thick fluid (5,000 cST – honey like) for MUT.  It spreads easily over large hot surfaces, stays in place and leaves minimal, if any residue.


Operating Range: -50°F to 800°F (-45°C to 425°C)

Viscosity: Fluid  ≈ 400 cps

Sound Velocity: 4900 ft/sec (1494 meters/sec)

Specify Gravity: 1.07

Echo 8 HT Brochure

Echo 8 HT MSDS