Features:

• Wide measurement range:
• 5MHz probe: 0.040" to 20" of steel
• 10MHz probe: 0.030" to 2" of steel (optional)
• Color LCD display with red, yellow and green visual alarm indication
• 100K internal datalogger with export to Excel
• Echo to Echo option to reduce coating errors
• File compare feature as a real time corrosion monitor
• Live Waveform (A-scan for thickness verification)
• B-scan (visual cross section of test piece)
• Vibrates on alarm
• Multiple transducer options for high temperature and difficult to measure materials
• Complete with protective holster, 2oz bottle of couplant, 2 AA batteries, 5MHz Transducer, hard carrying case, USB cable and XPorter software
• Fast minimum feature to capture minimum thicknesses

Specifications:

• Steel Thickness Range: MHz probe: 0.040 to 20" (1.0 to 508mm); 10MHz probe: 0.030" to 2" (0.76mm to 50.8mm)
• Material velocity calibration range: 0.200 to 0.7362 in/μS (0.508 to 18.699mm/μS)
• Languages English, French, Spanish, Italian, Czech, German, Portuguese, Slovak, Finnish, and Hungarian
• Hold Mode Holds display to retain last thickness reading with reverse video display
• Freeze Mode: Freezes display (ideal for high temperature readings)
• Fast Min/Max Mode: Displays Min or Max and actual thickness value at 20 measurements/sec
• Units Inches/Millimeters/Microseconds
• Alarms: Audible beeping; illuminae flashing display and keypad; and vibration feedback
• Illuminating Keypad: F1 = Red, F2 = Yellow, F3 = Green for easy, go/no-go testing
• Gain - Variable adjustment In 1dB steps from 20-90dB or Automatic Gain Control (AGC) for waveform
• B-Scan - Displays a cross section of the test piece: Displays a visual cross section of inspection area with no correlation to distance. B-Scan alarm colors consist of: Red = below minimum/above maximum; Yellow = Caution; and Green = Good.
• Echo to Echo: Measure the metal thickness only (paint & coatings do not affect base material thickness value)
• Differential Mode: Displays the difference from the actual thickness measurement and a user entered reference value
• Velocity Mode: Displays acoustic sound speed to measure thickness of unknown materials
• Datalogger: Stores 50k readings (expandable to 100k) and 5,000 waveforms; file names up to 20 characters long; and the included Extech XPorter software extracts .csv data files that can be opened for viewing in MS Excel, Notepad, or Wordpad. File compare & grid review
• Range: Adjustment of manual range control or auto zoom tracking to center echoes independent of selected range
• Rectification Modes RF, Half Wave Positive, Half Wave Negative and Full Wave Rectification
• Live Waveform (A-Scan): Full adjustments for gain in 1dB step or AGC, main bang blank, blank after first received echo, range including zoom auto tracking to center echoes independent of material and rectification
• Battery Life: 8 to 14hrs (depends on operating conditions) 

The TKG250 is a Digital Ultrasonic Thickness Gauge/Datalogger with Color Waveform function. Extech offers Thickness Gauges designed in compact, handheld, rugged housing ideal for field use. The ultrasonic technology allows for non-destructive thickness measurements for primarily steel structures. Datalogs up to 100K readings and can be exported to Excel® for further analysis. Complete with protective holster, 2oz bottle of coolant, 2 AA batteries, 5MHz Transducer, hard carrying case, USB cable and Exporter software.