EPOCH 6LT Olympus Logo

6LTThe EPOCH® 6LT portable flaw detector combines the functionality of a powerful ultrasonic flaw detection device with a form factor designed to thrive in rope access and high portability applications.

Reliable Flaw Detection in the Palm of your Hand

Portable and easy to use, the EPOCH 6LT flaw detector is an ergonomic, rugged instrument that delivers user comfort and more uptime.

  • Weighs just 1.95 pounds (890 g) with a grip-oriented weight distribution for one-handed operation with minimal wrist fatigue
  • Rotary knob and simple button design make it easy to use, even when wearing gloves
  • Engineered to IP65/67 and drop tested
  • Clear, bright screen for readable A-scans in any light

More Functionality on the Go

The EPOCH 6LT flaw detector’s workflow is simple and straightforward. Despite the instrument’s small size, it has the features and functions to meet the requirements of nearly any conventional ultrasonic inspection application.

  • Offers all the core functionality of the EPOCH 650 flaw detector in a small, portable instrument
  • Meets the requirements of EN12668-1:2010
  • Optional corrosion software with center-pin transducer ID
  • Optional Wi-Fi connectivity

Designed for Rope Access and Ultra-High Portability Applications

For rope access technicians, the EPOCH 6LT flaw detector offers features to help keep you safe during challenging inspections.

  • With the optional rope access accessory kit, secure the instrument to your leg with a strap or attach it to your harness, leaving your hands free to maintain balance or adjust the probe
  • Rotate the display from portrait to landscape to properly view the A-scan and readings
  • For greater flexibility, the 1/4-20 threaded insert enables you to connect the flaw detector to a wide variety of Olympus and third-party accessories



EPOCH LTC Specifications*

GeneralUser Interface LanguagesEnglish, Spanish, French, German, Japanese, Chinese, Portuguese, Russian, Italian
 Transducer ConnectionsLEMO 00
 Data Storage100,000 IDs onboard
 Battery Type and LifeSingle lithium-ion rechargeable standard; 6 h life
 Power RequirementsAC Mains: 100 VAC to 120 VAC, 200 VAC to 240 VAC, 50 Hz to 60 Hz
 Display TypeFull VGA (640 × 480 pixels) transflective color LCD, 60 Hz update rate
 Display Dimensions (W × H, Diag.)117 mm × 89 mm, 146 mm (4.62 in. × 3.49 in., 5.76 in.)
 Overall Dimensions (W × H × D)209 mm x 128 mm x 36 mm, 58 mm at hand grip (8.2 in. x 5 in. x 1.4 in., 2.3 in. at hand grip)
 Weight890 g (1.95 lb), including lithium-ion battery
Instrument Inputs/OutputsUSB Ports(1) USB 1.1 Full Speed Host (Type A) 
(1) USB 2.0 Full Speed Client (Type Mini B)
 Video Output1 digital video output
Environmental RatingsIP RatingIngress Protection (IP) engineered to IP67 (dust tight and water submersion) and IP65 (dust tight and water jets) per IEC 60529-2004 (Degrees of Protection provided by enclosures—IP Code). The product rating is confirmed by means of Olympus' internal design verification test process.
 Explosive AtmosphereMIL-STD-810F, Method 511.4, Procedure 1.
 Shock TestedMIL-STD-810F, Method 516.5, Procedure I, 6 cycles each axis, 15 g, 11 ms half sine.
 Vibration TestedMIL-STD-810F, Method 514.5, Procedure I, Annex C, Figure 6, general exposure: 1 hour each axis.
 Operating Temperature-10 °C to 50 °C (14 °F to 122 °F)
 Battery Storage Temperature0 °C to 50 °C (32 °F to 122 °F)
PulserPulserTunable square wave
 PRF10 Hz to 2000 Hz in 10 Hz increments
 Energy Settings100 V, 200 V, 300 V, or 400 V
 Pulse WidthAdjustable from 25 nsec to 5,000 nsec (0.1 MHz) with PerfectSquare™ technology
 Damping50, 400 Ω
ReceiverMaximum Input Signal20 Vp
 Receiver Input Impedance400 Ω ± 5%
 Receiver BandwidthDC to 26.5 MHz at -3 dB (standard version) 
0.2 to 26.5 MHz at -3 dB (EN12668 compliant version)
 Digital Filter Settings8 digital filter sets (standard version) 
7 digital filter sets (EN12668 compliant version)
 RectificationFull-Wave, Positive Half-Wave, Negative Half-Wave, RF
 System LinearityHorizontal: ± 0.5% FSW
 Resolution0.25% FSH, Amplifier Accuracy +/- 1dB
 Reject0 to 85% FSH in 1% increment positions
 Amplitude Measurement1.25% to 110% full screen height
 Measurement RateEquivalent to PRF in all modes (single shot)
CalibrationAutomated CalibrationVelocity, zero offset 
Straight beam (first back wall or echo-to-echo) 
Angle beam (sound path or depth)
 Test ModesPulse Echo, Dual, or Through Transmission
 UnitsMillimeters, inches, or microseconds
 Range4.31 mm to 6,700 mm at 5,900 m/s (0.2320 in./μs)
 Velocity635 m/s to 15240 m/s (0.0250 in./μs to 0.6000 in./μs)
 Zero Offset0 to 750 μs
 Display Delay-10 microseconds to 2203 microseconds
 Refracted Angle0° to 85° in 0.1° increments, then jump to 90°
GatesMeasurement Gates2 fully independent flaw gates
 Gate StartVariable over entire displayed range
 Gate WidthVariable over entire displayed range
 Gate HeightVariable from 2 to 95% full screen height in 1% increments
 AlarmsPositive and negative threshold/curve, minimum depth (gate 1 and gate 2)
MeasurementsMeasurement Display Locations5 locations available (manual or auto selection)
 GATE (1, 2)Thickness, sound path, projection, depth, amplitude, time-of-flight, min./max. depth, min./max. amplitude, sizing measurements based on mode
 Four Measurement Display LocationsUser selects up to four measurements from either gate to display on the live screen.
 Echo-to-echoStandard gate 2 – gate 1
 DAC/TCGStandard, up to 50 points, 110 dB dynamic TCG range
 Special DAC ModesCustom DAC (up to 6 curves), 20–80% view
 Curved Surface CorrectionStandard OD or bar correction for angle beam measurements

Powerful Features Optimized for One-Handed Operation

The EPOCH® 6LT portable flaw detector has a variety of standard and optional software features designed to meet a wide range of flaw detection applications.

Exporting saved inspection files for reporting is easy. Send your inspection results to a removable USB memory stick in a variety of convenient file formats, such as BMP, CSV, and PDF, to quickly communicate your data.


Connected and Cloud Enabled

With optional Wi-Fi, connect your flaw detector to the Olympus Scientific Cloud and access powerful cloud-based features, including:

  • Wireless firmware upgrade
  • File backup and archiving
  • Remote file access and management

Cloud file management includes all EPOCH 6LT file types, making it easier than ever to report and communicate your inspection results.


Standard Software Features for Reliable Flaw Sizing

Dynamic DAC/TCG: Calculates signal amplitude as a percentage or decibel level compared to a DAC curve or a reference echo amplitude fixed at a time-varied gain. The DAC version includes standard, custom DAC warning curves, and 20–80% views.

DGS/AVG: Enables echo signals to be evaluated with a DGS/AVG diagram, which illustrates the relationship between echo height, flaw size, and distance from the transducer.


Added Versatility: Optional Software Features

AWS D1.1 and D1.5: Provides a dynamic reflector indication rating for various AWS weld inspection applications. This enables more efficient inspections by eliminating manual calculations.

Corrosion Module: For corrosion inspection, this feature enables automatic ultrasonic setups based on transducer selection with automatic probe recognition, Automatic Gain Control (AGC), thickness gage measurement algorithm, true V-Path correction, and transducer wear compensation using an automatic zero function (“Do Zero”). The module also features color-coded grid view for improved corrosion reporting capabilities.

Back Wall Echo Attenuator (BEA): Attenuates the back wall of an inspected part using the screen region defined by Gate 2. BEA software enables the user to monitor for back wall drop off while scanning at a high gain level.

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