ElektroPhysik MiniTest 420 Ultrasonic Wall Thickness Gauge
Uses Pulse-Echo Principle of Ultrasonics
Basic Ultrasonic Thickness Gauge with adjustable calibration for a wide range of materials
Several Transducers are optionally available including one for High Temperature materials (350 °C)
Automatic identification of probes
The ElektroPhysik MiniTest 420 Ultrasonic Wall Thickness Gauge is a basic straight forward ultrasonic thickness testing gauge for simple quick measurements. The MiniTest 420 incorporates a calibration block for zero adjustments and quick calibration.
Sturdy and accurate ultrasonic thickness gauge based on the ultrasonic pulse run-time method.
6 ultrasonic probes with frequencies ranging between 2 and 10 MHz in different designs offer a broad spectrum of applications and thickness measurements ranging from 0.65 mm to 500 mm. A high temperature ultrasonic probe is also available, designed for measurement of hot materials with temperatures of up to 350 °C.
Uninterrupted scanning of a part for thinning is possible at the minimum mode.
Features
- Includes Factory "Works" Calibration Certificate.
- NIST Traceable Calibration Certificate optionally available at additional cost
- Suitable for measurement of various materials including steel, stainless steel, aluminum, glass, plastics (PS/PE)
- Adjustable units inch/mm
- Resolution of 0.001" (0.01 mm)
- Automatic identification of probes
- Uses Pulse-Echo Principle of Ultrasonics
- Sensitivity can be set to "Auto" or "Manual"
- Several Transducers are optionally available including one for High Temperature materials (350 °C)
- Warranty 1-Year
- Made in Germany
Specifications
Measuring Range | Pulse Echo: With standard transducer U5.0: 0.8 - 350 mm (0.03 - 13.8") (For ranges of other transducers see table) |
Resolution | 0.01mm (0 - 99.9 mm), 0.1(> 100 mm) |
Display | 128 x 64 pixels with backlight |
Velocity Range | 0.0492 to .3937 in/μs. 1250 to 10,000 meters/sec |
Probe | Standard transducer U5.0: 8mm (0.31") - (For diameter of other transducers see table) |
Operation Temperature | -20 to 50°C (-4 to 122°F) |
Battery Type | Two AA batteries |
Battery Life | more than 80 hours under continuous operation |
Weight | approx. 6.70 oz (190 g) |
Size | 5.1 x 2.9 x 0.94" - (130 X 73 X 24 mm) |
Accessories Included | U5.0 5 MHz standard transducer, Operating instructions, two 1.5V AA batteries, Plastic carrying case, Coupling liquid (200 ml), |
Housing Protection | IP40 |
Range
Type | Diameter | Frequency | Measuring Range |
U5.0 | 8 mm | 0.31" | 5.0 MHz | 0.8 - 350 mm | 0.031 - 13.8" |
U2.0 | 12 mm | 0.47" | 2.0 MHz | 2.0 - 500 mm | 0.079 - 19.7" |
U7.5 | 6 mm | 0.24" | 7.5 MHz | 0.65 - 50 mm | 0.026 - 1.97" |
U10.0 | 4 mm | 0.16" | 10.0 MHz | 0.65 - 20 mm | 0.026 - 0.79" |
U5.0HT | 13 mm | 0.51" | 5.0 MHz | 3.0 - 200 mm | 0.12 - 7.87" |

Type | Material Temperature | Application |
U5.0 | -12 to 60 °C | on flat surfaces or huge curvature radii |
U2.0 | -12 to 60 °C | rough surfaces such as cast iron |
U7.5 | -12 to 60 °C | thin w all thickness and small curvature radii |
U10.0 | -12 to 60 °C | small tube diameters |
U5.0HT | -12 to 350 °C | for temperatures up to 350 °C |
Downloads
F.A.Q.
Do Ultrasonic Thickness Gauges require any training for use?
No. Ultrasonic Thickness Gauges are designed for simple operation and feature easy-to-use instruction manuals. We also provide technical support via telephone and/or email, and a 30-day money back guarantee.
Are Ultrasonic Thickness Gauges calibrated at the factory?
Yes. Ultrasonic Thickness Gauges arrive fully calibrated and ready to measure.
Do Ultrasonic Thickness Gauges include Certificate of Calibration?
Yes. Ultrasonic Thickness Gauges include NIST-Traceable Calibration Certificate, CE-Certified
Can I measure the thickness of non-metallic materials like plastic and rubber with Ultrasonic Thickness Gauges?
Yes! Ultrasonic Thickness Gauges feature several preprogrammed sound velocities for common materials.
Can Ultrasonic Thickness Gauges measure cast/ductile iron or cast aluminum?
Yes. Ultrasonic Thickness Gauges instruments are designed to accurately measure the wall thickness of carbon steel, aluminum, stainless steel and plastic.