Field Instruments

Product Overview

The MFD620C Digital Ultrasonic Flaw Detector from MITECH is a high-performance portable ultrasonic NDT instrument designed for fast, accurate, and reliable detection of internal defects in metallic and non-metallic materials.
Engineered for demanding field conditions, the MFD620C combines advanced digital signal processing, a high-resolution TFT color display, and intelligent defect analysis functions to support quality control, safety inspections, and preventive maintenance.

It is widely used for detecting cracks, inclusions, porosity, lack of fusion, and air holes in welds, forgings, castings, plates, pipes, and structural components across multiple industries.

Key Features

• High-resolution 320 × 240 TFT color display with adjustable brightness
• ASTM Class I compliant performance, suitable for professional NDT applications
• Wide frequency bandwidth: 0.5 – 10 MHz with automatic probe matching
• Large dynamic range ≥ 36 dB for reliable defect detection
• Multiple gate modes: wave-getting gate, wave-losing gate, single & dual gate reading
• DAC / AVG curves with automatic generation and correction
• AWS D1.1 welding inspection support with dynamic defect level evaluation
• Peak memory & real-time defect positioning (depth, distance, and sound path)
• B-Scan color imaging for intuitive defect visualization
• Data storage for up to 1000 inspection records, including waveforms and parameters
• Video recording & playback of inspection processes (up to 2 hours)
• USB 2.0 OTG communication for PC connection and data transfer
• Automatic probe performance self-checking and reporting
• High-capacity lithium battery with more than 8 hours continuous operation
• IP65 dust-proof and water-resistant rugged housing for site use

Technical Specifications

• Measuring Range: 0 – 6000 mm (steel equivalent)
• Bandwidth: 0.5 – 10 MHz
• Material Velocity: 1000 – 15000 m/s
• Dynamic Range: ≥ 36 dB
• Vertical Linearity Error: ≤ 3%
• Horizontal Linearity Error: ≤ 0.2%
• Resolution: > 40 dB (SP14)
• Sensitivity Leavings: 60 dB (flat-bottom hole Ø2 mm at 200 mm)
• Rejection: 0 – 80% linear, without affecting gain or linearity
• Noise Level: ≤ 10%
• Probe Types Supported: Straight beam, angle beam, dual-element, through-transmission
• Pulse Energy: 200 V / 300 V / 400 V / 500 V / 600 V selectable
• Pulse Width: 30 – 510 ns, continuously adjustable
• Sampling: 10-bit A/D converter, 160 MHz sampling speed
• Gain Range: 0 – 110 dB, adjustable in 0.1 dB / 1 dB / 2 dB / 6 dB steps
• Alarm: Beep alarm and LED alarm
• Power Supply: DC 9 V lithium battery
• Working Time: > 8 hours continuous
• Operating Temperature: –10 °C to +50 °C
• Relative Humidity: 20 – 95% RH
• Probe Connection: BNC or LEMO
• Dimensions: 280 × 220 × 70 mm

Applications

• Weld inspection (AWS, Railways, pressure vessels, pipelines)
• Castings & forgings defect detection
• Structural steel and fabrication QA/QC
• Oil & gas, petrochemical, power plants
• Shipbuilding, aviation, railways
• Maintenance, shutdown inspections & life assessment

Standard Configuration

• MFD620C Main Unit
• Straight Beam Probe (4 MHz, 10 mm)
• Angle Probe (4 MHz, 8 × 9 mm, 60°)
• Probe Cable (BNC–LEMO)
• Lithium Battery Module
• Power Adapter & Power Cable
• Instrument Carry Case
• Support Pillars
• Data Processing Software
• USB Communication Cable

(Optional probes and accessories available)

Why Buy from FieldInstruments.lk?

• Genuine MITECH NDT instruments
• Expert technical guidance and probe selection support
• Reliable after-sales service
• Trusted supplier for industrial inspection & NDT solutions in Sri Lanka

📞 Contact FieldInstruments.lk for pricing, demonstrations, and technical support.

Fieldinstruments.lk
50/3, Angampitiya Rd, Ethul Kotte, Sri Lanka. 10100.
Phone: +94718555888 Email: info@fieldinstruments.lk