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Quick Details

  • Place of Origin: Guangdong, China (Mainland)
  • Brand Name: GRAIGAR
  • Model Number: MFD350B
  • Power: Electronic
  • Usage: Ultrasonic Flaw Detector
  • Color:: Black
  • Hi-resolution:: 320 x 240 pixels
  • Range:: Up to 6000 mm in steel
  • Power:: Electronic
  • Usage:: Portable Ultrasonic Flaw Detector
  • Bandwidth:: (0.2 ~ 20) MHz
  • Power Supply:: DC 9V; lithium batteries
  • Material Velocity:: (1000 ~ 9999) m / s
  • Dynamic Range:: ≥ 32dB
  • Ambient Temperature:: (-20 ~ 50) ℃

Packaging & Delivery

Packaging Details Packed in carrying case firstly, and then reinforced with export carton for outer packing
Delivery Time 3 working days after received the payment



Digital Portable MFD350B Ultrasonic Flaw Detector NDT Instruments Testing Equipment 0 ~ 6000mm




MFD350B Ultrasonic Flaw Detector is an advanced digital ultrasonic flaw detector featuring a multi-color TFT LCD and a host of new features to meet challenging inspection requirements. It combines powerful flaw detection and measurement capabilities, extensive data storage, and the ability to transfer detailed inspection data to the PC via its high-speed USB port.
The instrument incorporates many advanced signal processing features
including a 10MHz RF bandwidth to permit testing of thin materials, narrowband filters to improve signal to noise in high gain applications, a spike pulser for applications requiring higher frequencies, and a tunable square wave pulser to optimize penetration on thick or highly attenuating materials.
The instrument can be widely used in locating and sizing hidden cracks, voids, disbands, and similar discontinuities in welds, forgings, billets, axles, shafts, tanks and pressure vessels, turbines, and structural components.
Display :
Hi-resolution (320×240 pixels) multi-color TFT LCD with 4 user-selectable brightness control provides high contrast viewing of the waveform from bright, direct sunlight to complete darkness.
The hi-resolution multi-color TFT LCD display with fast 60 Hz update gives an analog look to the waveform providing detailed information that is critical in many applications including nuclear power plant inspections.
Range :
Up to 6000 mm in steel. suitable for use on large work pieces and in
high-resolution measurements.

Pulser :
Pulse Energy selectable among Low, Medium and High.
Pulse Repetition Frequency adjustable from 10 Hz to 1 KHz in 1 Hz increments.
Damping selectable among 100,200,and 400 for optimum probe
Test Modes include Pulse echo, dual and thru-transmission
Receiver :
Sampling10 digit AD Converter at the sampling speed of 160 MHz
RectificationPositive Halfwave, Negative Halfwave, Fullwave and RF
Analog Bandwidth: 0.5MHz to 10MHz capability with selectable frequency
ranges (automatically set by the instrument) to match probe for optimum
Gain0 dB to 110 dB adjustable in selectable steps 0.1 dB, 2 dB, 6 dB, and locked.
Gates :
Two fully independent gates offer a range of measurement options for signal height or distance using peak triggering.
The echo-to-echo mode allows accurate gate positioning for signals which are extremely close together.
Gate Start: Variable over entire displayed range
Gate Width: Variable from Gate Start to end of displayed range
Gate Height: Variable from 0 to 99% Full Screen Height
Alarms: Threshold positive/negative

Memory :
Memory of 100 channel files to store calibration set-ups
Memory of 1000 wave files to store A-Scan patterns and instrument settings.
All the files can be stored, recalled and cleared.

Functions :
Semiautomatic two point calibration: Automated calibration of transducer
zero offset and/or material velocity
Flaw LocatingLive display Sound-path, Projection (surface distance),
Depth, Amplitude,
Flaw sizing: Automatic flaw sizing using AVG/AVG or DAC, speeds reporting of defect acceptance or rejection.
Digital Readout and Trig. Function: Thickness/Depth can be displayed in
digital readout when using a normal probe and Peam path, Surface
Distance and Depth are directly displayed when angle probe is in use.
Both the DAC and the AVG method of amplitude evaluation are available.
Curved Surface Correction feature
Crack Height Measure function
Weld figure feature
Magnify gatespreading of the gate range over the entire screen width
Video Recording and play
Auto-gain function
Envelope: Simultaneous display of live A-scan at 60 Hz update rate and
envelope of A-scan display
Peak Hold: Compare frozen peak waveforms to live A-Scans to easily
interpret test results.
A Scan FreezeDisplay freeze holds waveform and sound path data
B Scan display feature
Real Time Clock
The instrument clock keeps running tracking the time.

High speed USB2.0 port.
The optional DataPro software helps manage and format stored inspection data for high-speed transfer to the PC. Data can be printed or easily copied and pasted into word processing files and spreadsheets for further reporting needs. New features include live screen capture mode and database tracking
Internal rechargeable Li-ion battery pack rated 7.2V at 8800 mAh
8 hours nominal operating time depending on display brightness
8-10 hours typical recharge time

Operating adjustments are easily and quickly made using the rotary knob.


Range: 0 to 6000 mm, at steel velocity
Material Velocity: 1000 to 9999m/s
Display Delay: -20 to 3400 µs
Probe Delay/Zero Offset : 0 to 99.99us
Sensitivity: 110 dB max in selectable resolution 0.1, 1.0, 2.0, 6.0 dB and
Test Modes: Pulse echo, dual element and thru-transmission
Pulse Repetition Frequency ranges from 10 Hz to 1000 Hz
Pulse Energy: Low, Medium and High spike pulse.
Damping: 100, 200, 400 ohms
Bandwidth (amplifier bandpass ): 0.5 to 10 MHz
Gate Monitors: Two independent gates controllable over entire sweep range
Rectification: Positive halfwave, negative halfwave, fullwave, RF
System Linearity: Horizontal: +/-0.2% FSW, Vertical: 0.25% FSH, Amplifier
Accuracy +/-1 dB.
Reject (suppression): 0 to 80% full screen height
Units: Inch or millimeter
Transducer Connections: BNC or LEMO
Power Requirements: AC Mains 100-240 VAC, 50-60 Hz
Dimensions: 263x170x61 mm (10.4x6.7x2.4 inch)
Operating Temperature: -10 to 50
Storage Temperature: -30 to 50



MFD350B Standard Configuration






Main Body



Straight Beam Probe



Angle Probe



Machine-probe Cable (Q9-Q9)



Battery Module



Power Adapter (Charger)



Support Pillar






Instrument Case



Data proceeding Software



USB communication Cable














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