0.001mm Resolution A/B Scan Mode 20um-1800mm Measuring Range Coating Thickness

Designed to measure coating thickness on a wide variety of metal and non-metal substrates, including glass, plastic, composite, concrete, and wood.

The TM291 is a new type of handheld high-precision digital non-metal coating thickness gauge featuring A/B scanning. It adopts the principle of ultrasonic thickness measurement based on pulse reflection. It is suitable for measuring the thickness of materials that allow ultrasonic waves to propagate through them at a constant speed and reflect from the back surface. The measurement resolution is 0.001 mm and the measurement range reaches as thin as 0.02 mm. It can test the thickness of both substrates and coatings simultaneously.

This product is widely used in petroleum, chemical, metallurgy, shipbuilding, aerospace, energy, and other fields.

• Wide measurement range with a minimum coating thickness of 20 μm and a maximum thickness of 1800 mm.
• High-precision measurement with a maximum resolution of 0.001 mm and a repetition resolution of ±0.002 mm.
• Equipped with A-scan mode, B-scan mode, and numerical display mode.
• Coating and paint layers on some composite materials can be detected based on the different sound velocities of the materials. The thickness of each layer of more than 10 multilayer materials can be measured simultaneously, and the thickness value of each layer can be switched under the same echo.
• Penetrating coating and echo-to-echo measurement functions for materials with paint layers and coatings on the surface.
• Multiple measurement modes: THIN, MB-E, E-E, and AUTO modes meet the measurement requirements of conventional thick workpieces; THIN and E-E modes enable the measurement of thin parts.
• Numerical modes include conventional thickness value mode, difference / reduction rate mode, and maximum value mode.
• Two gain modes: automatic gain and manual gain.
• Manual shutdown and automatic shutdown can be configured, with an energy-saving function.
• Supports a variety of probes, including double crystal probes and single crystal probes, and supports up to 20 MHz high-frequency probes.
• Supports mass storage and can store 100,000 thickness values, 500 groups of A-scan waveforms, and 500 groups of B-scan waveforms simultaneously.
• Large 3.5-inch color TFT-LCD display with 320*240 high-definition (QVGA) resolution.
• Multiple calibration methods including one-point calibration, multi-point calibration, and manual calibration. Sound velocity and probe zero position can be calibrated simultaneously. Supports V-path correction for double crystal probes.
• Supports conversion between metric and British systems; switchable between millimeter and inch units.
• Supports Chinese and English display languages.

Measures coating thickness on various metal and non-metal substrates, including glass, plastic, composite, concrete, and wood. Suitable for materials that are good ultrasonic conductors, such as metals (steel, cast iron, aluminum, copper, etc.), plastics, ceramics, glass, resin, and glass fiber.

The principle of ultrasonic thickness measurement is similar to that of light wave measurement. The ultrasonic pulse emitted by the probe reaches the measured object and propagates through it. When it reaches the material interface, it is reflected back to the probe. The thickness of the measured material is determined by accurately measuring the time of ultrasonic propagation within the material.

Note: The company reserves the right to make technical modifications without prior notice.