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We Invent to Prevent.
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Evident EPOCH 700
Conventional Ultrasonic Flaw Detector
High-resolution portable ultrasonic testing with advanced signal processing
EPOCH 700 In Brief
The Evident EPOCH™ 700 is a conventional ultrasonic flaw detector with 24-bit A-scan digitization and a high-dynamic-range receiver for capturing signals across a wide amplitude range. Its PerfectSquare™ tunable square wave pulser and 23 digital filter sets give inspectors control over pulse characteristics and signal filtering for different materials and transducer frequencies. The instrument supports flaw evaluation with multiple sizing methods and provides onboard tools for recording and reporting inspection results. Open .nde file support, 64 GB of internal storage, and Wi-Fi and Bluetooth® connectivity simplify data transfer and integration with compatible analysis software. A 7-inch touchscreen, dedicated adjustment knob, and direct-access buttons form its operator interface.
ISO 22232-1 Compliance
A must-have for inspectors working with international codes and quality management systems, especially in power generation, oil and gas, and aerospace.
EPOCH 700 Key Features
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24-bit A-scan digitization and high-dynamic-range receiver
for detailed signal acquisition across a wide amplitude range, with minimal saturation and clipping. -
PerfectSquare™ tunable square wave pulser
for adjustable pulse voltage and width to match different transducers and inspection requirements. -
23 digital filter sets
for signal processing across a wide range of materials and transducer frequencies. -
Multiple flaw sizing methods
including DAC/TCG, DGS/AVG, AWS D1.1/D1.5 evaluation, and custom curve configurations. -
Integrated ray-trace visualization
for relating A-scan indications to component geometry and guiding probe positioning. -
Open .nde file support
for exchanging inspection data with compatible analysis platforms and quality assurance systems. -
Onboard reporting and A-scan recording
for documenting, reviewing, and storing inspection results directly on the instrument. -
Touchscreen and dedicated physical controls
for practical operation in field conditions, including when wearing gloves.
EPOCH 700 Main Specifications
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24-bit
A-scan digitization -
0–110 dB
Gain range -
100–400 V
Pulser voltage -
20–5000 ns
Square wave pulse width -
23
Digital filters -
Up to 800%
Full-screen height A-scan amplitude range -
DAC/TCG
DGS/AVG
AWS D1.1/D1.5Flaw sizing methods -
IP65
Ingress protection
How EPOCH 700 works
The EPOCH 700 uses conventional ultrasonic testing (UT) to detect and evaluate internal discontinuities in materials and components.
Generate and Transmit Ultrasonic Waves
An ultrasonic transducer converts electrical pulses into high-frequency sound waves and transmits them into the test material.
Receive Reflected Signals
As the sound travels through the component, it reflects from boundaries and discontinuities such as cracks, voids, inclusions, and other flaws. The transducer receives the returning echoes and converts them into electrical signals.
Process and Display A-scan Signals
The EPOCH 700 processes the received signals and displays them as an A-scan waveform, showing echo amplitude against sound travel time or distance. Its 24-bit A-scan digitization, high-dynamic-range receiver, and digital filters help preserve signal detail and improve signal clarity across a wide range of amplitudes and inspection conditions.
Evaluate Indications
Inspectors analyze the A-scan waveform to evaluate indications and determine their location and size. Integrated calibration tools, independent flaw gates, and multiple sizing methods support straight-beam and angle-beam inspections across a broad range of conventional UT applications.
Advanced Flaw Sizing and Evaluation Tools
The EPOCH 700 uses conventional ultrasonic testing (UT) to detect and evaluate internal discontinuities in materials and components.
- DAC/TCG (Distance Amplitude Correction / Time-Corrected Gain)Compensates for signal amplitude loss as sound path distance increases, using reference reflectors. Supports ASME, JIS, CNDAC, and custom curve configurations.
- DGS/AVG (Distance Gain Size / Abstand-Verstärkung-Größe)Evaluates echo signals using a reference diagram that relates reflector size and distance from the transducer to echo amplitude.
- AWS D1.1/D1.5Supports structural steel weld inspection by calculating dynamic indication ratings in accordance with applicable AWS requirements.
- TCG TableEnables inspectors to create and adjust time-corrected gain points using gated echoes or manually entered values.
Data Management
The EPOCH 700 combines onboard data management tools with open-format file support and wireless connectivity, making inspection records easier to organize, review, and transfer to external analysis and quality assurance systems.
- Open .nde File FormatThe EPOCH 700 supports the open .nde file format, providing a standardized way to store and exchange ultrasonic inspection data. Inspection records can be transferred to compatible Evident analysis platforms and third-party software for further review, reporting, and integration into quality assurance workflows.
- Onboard ReportingBuilt-in reporting capabilities let inspectors create reports directly on the instrument. This simplifies field documentation and keeps inspection results together with the corresponding measurement data.
- A-scan RecordingThe EPOCH 700 can record A-scan sequences for up to 30 seconds at 60 frames per second. Recordings can be reviewed directly on the instrument and saved in .nde format for subsequent analysis and documentation.
- 64 GB Internal StorageThe 64 GB of internal storage provides space for inspection files and associated reports. Inspectors can keep relevant records on the instrument without relying on external storage during fieldwork.
- Wireless ConnectivityBuilt-in Wi-Fi and Bluetooth support wireless data transfer and connectivity with compatible devices and software. This reduces the need for physical connections when transferring inspection records or working with external systems.
- Software IntegrationOpen .nde support connects the EPOCH 700 with Evident analysis platforms and compatible third-party tools. This helps incorporate ultrasonic inspection data into existing review and quality assurance workflows.
Why Use EPOCH 700
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For reliable signal acquisition
24-bit A-scan digitization and a high-dynamic-range receiver capture detailed signals while minimizing saturation and clipping. -
For inspecting a wide range of materials
The tunable pulser and 23 digital filter sets adapt signal characteristics to different materials and inspection requirements. -
For comprehensive flaw evaluation
Multiple sizing methods, ray-trace visualization, and a live curve configurator support indication assessment across different inspection requirements. -
For practical field operation
A 7-inch touchscreen, adjustment knob, and direct-access buttons offer convenient control, including when wearing gloves. -
For organized inspection data
Open .nde support, onboard reporting, and A-scan recording simplify documentation, review, and data transfer. -
For demanding industrial environments
An IP65-rated enclosure, MIL-STD-810H shock and vibration testing, and a weight of approximately 1.8 kg suit the instrument to field inspections.
EPOCH 700 Applications
- Weld InspectionInspect welded joints in pipelines, pressure vessels, structural steel, and other critical components. DAC/TCG supports weld evaluation, while AWS D1.1/D1.5 tools provide dynamic indication ratings for applicable structural and bridge weld inspections. Integrated ray-trace visualization helps relate ultrasonic indications to the actual weld geometry.
- Composite InspectionEvaluate composite structures for bond-line failures, delaminations, and other internal discontinuities. High-resolution signal acquisition and digital filtering support inspection of materials with complex internal structures.
- Metal InspectionInspect castings, forgings, specialty alloys, and manufactured metal components for internal flaws. Flexible pulser settings and digital filters support different material properties and inspection requirements.
- Nuclear Industry InspectionPerform qualified ultrasonic examination procedures for critical nuclear components. EPRI PDI qualification covers selected procedures for ferritic and austenitic pipe welds, dissimilar metal welds, through-wall flaw sizing, and bolt and stud inspection.
Qualified for Demanding Nuclear Inspection Procedures
The EPOCH 700 has achieved qualification for several EPRI Performance Demonstration Initiative (PDI) procedures:
- PDI-UT-1 — Ultrasonic examination of ferritic pipe welds.
- PDI-UT-2 — Ultrasonic examination of austenitic pipe welds, with IGSCC endorsement.
- PDI-UT-3 — Through-wall sizing of planar flaws in similar metal piping welds, with IGSCC endorsement.
- PDI-UT-5 — Straight-beam ultrasonic examination of bolts and studs.
- PDI-UT-10 — Ultrasonic examination of dissimilar metal welds.
FAQ
Honest answers to important questions
The EPOCH 700 is a portable conventional ultrasonic flaw detector used to locate, evaluate, and size internal discontinuities in materials and components. Typical applications include weld inspection, composite testing, metal component inspection, and nuclear industry examinations.
Its main distinguishing features include 24-bit A-scan digitization, a high-dynamic-range receiver, a PerfectSquare™ tunable square wave pulser, and support for open .nde files. It also combines a touchscreen with physical buttons and a dedicated adjustment knob.
It refers to the instrument's digital representation of the ultrasonic signal amplitude. The 24-bit architecture supports high-resolution signal acquisition and amplitude measurements up to 800% of full-screen height. This helps inspectors evaluate subtle indications and perform flaw sizing even at elevated gain settings.
The instrument supports DAC/TCG, TCG Table, DGS/AVG, and AWS D1.1/D1.5. DAC/TCG also supports ASME, JIS, CNDAC, and custom curve configurations.
Yes. The instrument includes dedicated tools for weld inspection, including DAC/TCG, AWS D1.1/D1.5 evaluation, and integrated Part & Weld setup with ray-trace visualization.
The .nde format is an open digital data format based on modern web technology. The EPOCH 700 automatically generates verifiable inspection records in this format. These files can be transferred to Evident analysis platforms and compatible third-party software and QA systems.
Yes. Its onboard reporting function generates structured inspection reports directly on the instrument. Wi-Fi and Bluetooth connectivity also support wireless file transfer and report sharing.
The instrument can record up to 30 seconds of live A-scan data at 60 frames per second. Recorded sequences can be reviewed directly on the instrument and saved as .nde files for further analysis.
Yes. The instrument has achieved EPRI PDI qualification for several ultrasonic inspection procedures covering ferritic and austenitic pipe welds, dissimilar metal welds, through-wall flaw sizing, and bolt and stud examinations.
The instrument has an IP65-rated enclosure and has undergone drop, shock, and vibration testing to the specified MIL-STD-810H procedures. Its operating temperature range is -10 to +50 °C (14 to 122 °F).
Contact us
You can order the equipment or ask questions here