ECHO 7 Precision Ultrasonic Thickness Gauge

The Danatronics ECHO 7 offers a 3.5” high resolution sunlight readable color display with live A-Scan, use of a wide variety of contact, delay line and immersion probes from 1-20 Mhz as default and custom created and stored applications setups, B-Scan, datalogger  with up to 32GB of SD card memory and  interface to Microsoft excel. The ECHO 7 is available in 4 models including the ECHO 7, ECHO 7DL, ECHO 7W and ECHO 7DLW. The vibrate on alarm feature is the world’s first and is great for loud environments.


We pride ourselves in providing fast deliveries. However inventory changes rapidly and on occasion some items may not be in stock. If you require an expedited shipment, please contact us via e-mail or call our office to confirm availability of an item. *Nominal lead times vary by product.

Product Information


  • Simultaneous Live Color A-Scan and Thickness Display
  • 3.5” Sunlight readable color display
  • Field upgradeable software options including live waveform, datalogger or both
  • Fast/Min and Fast/Max displays minimum, maximum or both simultaneously with actual thickness at 25 Hz
  • Compatible with a wide variety of Danatronics single element transducers
  • Multiple languages
  • Datalogger interfaces with Microsoft Excel
  • Designed for IP67
  • Made in the USA

Typical Applications:

  • Coil steel
  • Plastic parts (bottles, toys, pipes, tanks and trays)
  • Aluminum
  • Glass
  • Fiberglass
  • Rubber


The ECHO 7 series is available in 4 models to suit every budget and application.


Hand-Held Digital Ultrasonic thickness gage with 3.5″  Sunlight Readable Color Display for thickness only including: Class 1, Class 2 and Class 3 Measurement, Plastic Carrying Case, 2 Oz. bottle of couplant (C-02G), Re-Chargeable Li. Ion batteries, Instruction manual and a Transducer up to 10 Mhz, 00 lemo to microdot cable, Charger adapter with usb cable and data xl interface program


Includes all the features of the ECHO 7 plus a live color waveform (A-scan). (No Datalogger) with the live waveform, you can adjust range, gain, blanks and rectification.


Includes all the features of the ECHO 7 plus “unlimited” reading Datalogger with export to excel, B-scan (2 GB removable micro SD card standard, other Micro SD cards up to 32GB are optional). Data XL interface program to export saved readings to p.c. (excel)


Combines all the features such as Hand-Held Digital Ultrasonic thickness gage with live Color Waveform, “unlimited” thickness readings via internal Datalogger with removable micro sd card including: Plastic Carrying Case (PC-09) , 2 Oz. bottle of couplant (C-02G), Re-chargable Li Ion Battery, Instruction manual and a transducer up to 10 Mhz., lemo to microdot cable, Class 1, Class 2 and Class 3 Measurement and B-Scan, A Custom Rubber boot with built in bail and 4 point chest harness, Charger adapter with usb cable and Data XL interface program to export saved readings to p.c. (excel). ECHO 7DLW also includes the ability to display the thickness of the optional oxide scale and the boiler tube wall thicknesses at the same time as well as the ability to calibrate on their individual sound velocities.

Software Options:

All ECHO series Options are field upgradeable via the keypad. Danatronics offers a unique and convenient way to upgrade your gages. The upgrades are done directly from your gage and do not require the use of a computer. The advantages of field upgradability are:

  • Never worry about downtime
  • No extra shipping cost
  • Less cost of ownership due to less freight and duty
  • No need to worry about the product being obsolete
  • Simple and Fast to perform

The field upgradeable options for the ECHO 7 series are:


Comes standard on the ECHO-7DL and ECHO-7DLW

This option is only available combined with the Datalogger option. Provides a non-encoded (time base) or a cross section (side view) of the part being inspected. The A-scan and B-scan can now be view at the same time. The operator can scroll where the cursor line is after a B-scan is generated.


Comes standard with the ECHO 7DL and ECHO 7DLW

The ECHO 7 Datalogger stores millions of readings in its Datalogger with removable sd card memory as linear, 2D, 3D or boiler in alpha numeric or thousands of waveforms (if gage is equipped with waveform option). Thickness values along with the i.d. information and all gage set up parameters are exported to Microsoft excel via the no-charge, included Data XL interface program.

Live Waveform

Comes standard with the ECHO 7W and ECHO 7DLW

The live waveform (A-scan) is used to verify reading stability. With the live waveform the operator can adjust gain, range, rectification and 2 forms of blanking to set the gage to ignore unwanted noise or mode converted echoes.

Oxide Scale

When equipped with the oxide scale option and 20mhz delay line transducer, both ECHO 7 and ECHO 8 units with live waveform can measure the oxide scale (0.015″-0.040″) and tube thickness calibrated to their independent sound speeds.


Size: Length 7.25” x Width 4.00” x Height 2.00” (184mm x 101.6mm x 50.8mm)

Weight: 1.15 lbs (.52 kg) with internal Li-Ion battery, 1.0 lb. (.45 kg) with optional Alkaline tray including 3 AA batteries

Display: 3.5” high resolution color display, 320 x 240 pixels (1/4 VGA), sunlight readable, including multiple color choices

Backlight: Light Emitting Diode (LED) backlight. Includes variable light intensity, indoor and outdoor modes

Temperature (Gage operating): -4 to 122F (-20 to 50C)

Package: Designed for IP67 rating, custom, splash-proof, high impact plastic with illuminating rubber keypad for go/no-go testing

Transducer Connector Type: Lemo 00 (2qty)

Bandwidth: 0.5-30 Mhz (-3dB)

Measurement Rate: 4 Hz or 25 Hz.

Pulser: 150V, Square Wave

Range: Thickness range depends on gage type, probe selection and material conditions. Typical range in corrosion mode, .004″-23″ (.508 – 584 mm)

Calibration: Cal zero, Cal velocity, Two-point calibration or Auto Calibration performs a two-point calibration using a 5-step test block

Material Velocity Range: .0200 in/usec-.7362 in/ uS (0.508-18.699 mm/ uS)

Batteries: Standard 3.7 V Li Ion internally rechargeable battery (11-27 hours…Standard mode of 4Hz. and 74% brightness: 27 hour continous operation, Fast mode at 25Hz., continuous measurements in echo to echo mode: 11 Hours) or optional alkaline tray for 3 AA batteries

Data XL: Interface program to send and receive stored readings, latest firmware and application set up files as two way communication from ECHO to computer (excel)

USB: USB 2.0

Stored Setups: Storage and recall of calibration and set up files (up to 5,000)

Memory: Internal memory standard on all models. For Datalogger models 2GB micro SD card standard and expandable up to 32GB

Gain: initial gain, final gain and slope. 20-90 db in .1 db increments

Zoom: Automatically centers echos in the center of the display independent of material thickness

Units: English, Metric, Microseconds

Temperature correction: Software to correct for varying sound speed as a function of entered temperature

Languages: English, French, German, Spanish, Italian, Russian, Czech, Finnish, Chinese, Japanese, Hungarian

Fast Min/Max: Displays minimum, maximum or both simultaneously with actual thickness at 25 Hz.

Alarms: Gage vibrates and beeps. Display changes color based on alarm condition

Transducers: Single, delay lines, contact, immersion

Measurement Types: 3 Classes: Class 1: Main bang to first backwall echo, Class 2: Interface echo to first backwall echo and Class 3: echo to echo after interface echo. Velocity mode (Velocimeter: displays acoustic sound speed based on entered thickness)

Freeze Mode: Direct access to freeze display (ideal for high temperature applications)

Hold Mode: Holds display to retain last thickness reading

Warranty: Limited 2 year warranty under normal use on parts and labor for gage. Optional Dan-A-Care to add up to 3 more years

Shut off: selectable auto shut off 1-31 minutes or never shut off

Differential Mode: Displays the difference from actual thickness measurement in absolute or percentage of a user entered reference value

Resolution: .0001” or .001” (.001mm or .01mm)

Units: Inches, Millimeters and Microseconds

Transport case: Hard Plastic with high density molded foam cut out for gage and most accessories

Certifications: CE certified, RHOS compliant, designed for IP67

Accessory Mount: ECHO 7 includes a 1/4×20 standard connection point on the back of the unit to allow for a multitude of accessories including a magnetic pipe attachment and a Gorilla Pod

Standard Inclusions: ECHO 7 series ultrasonic thickness gage, DKS-537, transducer up to 10 Mhz., LM-06  cable, 2oz bottle of couplant, operation manual, Data XL interface program, USB cable, Charger Adapter, Transport Case *A transducer is included with each model. Contact Danatronics for details

Available Software Options: Datalogger with B-scan, Live waveform, Precision mode, Oxide scale

Hardware Options: Bluetooth, Alkaline battery tray, rubber boot, Magnetic Pipe stand, footswitch

Related Accessories