Ultrasonic Product

MFD500B Ultrasonic Flaw Detector



MFD500B ultrasonic flaw detector with 320*240 TFT LCD, it can test, orient, evaluate and diagnose various flaws such as crack, lard, air hole in workpiece’s interior swiftly and accurately without any destruction. It can be used in Laboratory as well as in engineering filed. With range of 0-9999mm, it can meet the requirement for general defect inspection in manufacturing industry, metallurgical industry, metal processing industry, chemical industry and so on. Low power design with large capacity and high performance lithium battery module, it can be long standby for months. High quality with low price, it is the first choice for the practical economic model for ultrasonic testing equipment.


The instrument can be widely used in locating and sizing hidden cracks, voids, disbands and similar discontinuities in welds, forgings, billets, axles, shafts, tanks, pressure vessels, turbines and structural components.


Gate Alarm 

Gate position, gate width and gate height can be adjustable at will. The B gate can chose to set wave-getting alarm or wave-losing alarm. The beep in gate and LED light can be alarmed or closed (the LED light alarm is very effective under the noise environment).

Data Storage

The instrument is built with mass storage, the data and files will not be lost because of instrument power breakdown. The storage contents included channel parameters, waveform pictures and video files. It supports 100 groups of flaw detecting parameters channels. It can preset well for the combination parameters of various types of probes and instruments as well as set testing standards for each industry freely. It can save 10000 pictures of detecting echo signals and parameters. It can realize to save, read and transfer the data via the USB port.

Video Function

The instrument supports for saving the inspection process as video file and save it to the internal storage card. Video file can be replayed through the instrument. The instrument can support 2 minutes video. 


Record and save the tracking record of detecting date and time in real time.


With USB2.0 high speed communication interface, it also can use special software to upload and download data through the USB port.

Battery Module

The large capacity lithium battery module is easy to be assembled and disassembled. It can be charged independently but also charged by inserting wire. Its continuously working time is more than 10 hours.  

play Resolution

(320×240 pixels) full digital TFT LCD

Blind Area


Flaw Sizing

Automatic flaw sizing using AVG/AVG or DAC, speeds reporting of defect acceptance or rejection

Weld Figure Feature

Weld Figure feature can be enabled when detecting the weld parts using angle transducer


Automated calibration of transducer zero offset and/or material velocity


be able to store, recall the A-Scan patterns and instrument settings

Flaw Locating

Live display Sound-path, Projection (surface distance), Depth, Amplitude

Defect Quantification

directly display the result with db unit

Defect characterization

calculate the equivalent size of the flaw easily and quickly to facilitate the judgment of artificia

Curved Surface Correction

used to measure the surface distance and depth of defect on a curved surface



AWS D1.1

one of the AWSAmerican Welding Societystandards

Crack Height Measuring

measure and display the height of a crack found inside the workpiece

Magnify Gate

spreading of the gate range over the entire screen width

Video Recording

more than 10 minutes

A Scan Freeze

Display freeze holds waveform and sound path data

Coded Echo Color

locate the flaw position


display a graphical cross-section of the workpiece

Power-Saving Method

low power consumption

Protection Level


Communication Interface

High Speed USB2.0 port

DataPro Software


Working Language

freely switch between Chinese and English

Total Weight


Measuring Range

(0 ~9999) mm at steel velocity


0.5 to 15MHz automatic matching according to the probe frequency

Material Velocity

(1000~ 9999) m / s

Dynamic Range

≥ 36dB

Vertical Linear Deviation

≤ 3.0%

Horizontal Linear Deviation

≤ 0.2%


> 40dB (5P14)

Sensitivity Leavings

>60dB (flat-bottomed deep hole 200mmФ2)


(0 to 80)% Linear without affecting the linearity and gain

Noise Level

≤ 10%

Probe Type

straight beam probe, angle beam probe, dual element probe, through-transmit probe


Wave-getting Gate, Wave-losing Gate, Single Gate Reading, Dual Gate Reading


Beep Alarm and LED light Alarm

Power Supply


Working Time

10 hours

Overall Dimensions

263 × 170 × 61(mm)

Operating Temperature

(-10 ~ 50) ℃

Relative Humidity

(20 ~ 95)% RH

Pulse Energy

Low (300V), Medium (500V) and High (700V) selectable, suitable for various probe

Pulse Width

(0.10.512)µs range with continuous adjustment to match the different frequency probes

Probe Damping

100Ω200Ω400Ωselectable to meet different requirements for resolution and sensitivity


10 digits AD Converter at the sampling speed of 160MHz, waveform of highly fidelity


Positive half wave, negative half wave, full wave, RF

Gate Reading

optional for single gate and double gate reading mode, peak readings within the gate


0 dB to 110 dB adjustable in selectable steps 0.1 dB, 1 dB, 2dB and 6dB

Transducer Connections


MFD Models.jpg


E-mail: zhongyi@zhongyi-ndt.com

Tel: +86- 415-6133688

Fax : +86- 415-6133688

Work Time: 9AM--5PM (GMT+8)

Address: No. 5 Tong Xing Rd ,Zhen An Distr.

Dandong, 118011 China

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