Extech Instruments
72 TKG250- EN V2.4 11/13
8 Technical Specifications
Specifications for the TKG250 Ultrasonic Thickness Gauge with Live Color
Waveform
Size:
5" (127 mm) (L) x 3" (76.2 mm) (W) x 1.25" (31.75 mm) (H)
Weight:
8 OZ (.23 kg)
Thickness range:
0.008 - 20 inches (0.20 mm - 508 mm), depending on material, temperature and
transducer selection
Material velocity calibration range: 0.200-0.7362 in/μS (0.508-18.699 mm/μS)
Temperature:
Gauge Operating: -4° F to 122° F (-20° C to 50° C)
Surface temperature of material: Depending on probe used, from -5° F to 1000° F (-20° C to 537° C)
Battery life:
Up to 50 hours (20 hours with backlight on)
Battery type:
2 "AA" Alkaline
Display:
220 X 170 Graphics Color TFT with Live Color Waveform
Information displays:
LOS, min, max, large reading while displaying min at the same time, velocity,
zero, calibration, units, freeze, unfreeze, % battery life remaining, gain - low, std, high, echo-to-echo
symbol
Resolution: 0
.001" (0.01 mm), 0.01" (0.1mm)
Accuracy:
Basic Accuracy is 0.004” but on clean smooth steel an accuracy of 0.001” is not
uncommon. The more corrosive the environment, and pitted the surface under test, the closer to the
0.004” accuracy one can expect to be. As noted, a higher accuracy can be obtained when measuring
on clean smooth steel.
Probe recognition:
Via pick list from a menu
Delay line zero measurement:
Auto at power up with listed numeric value. Ideal for correcting delay
line wear/curvature and for transducer acoustic drift at elevated temperatures
Package:
Custom, splash-proof, high-impact plastic with rubber, illuminating keypad for go/no-go
testing
Bandwidth:
0.5-20 MHz (-3dB)
Units:
English/Metric/Microseconds
WaveForm:
Live Color Waveform with Dynamic color change on alarm, large thickness reading,
super-impose thickness over top right of A-Scan.
Rectify:
RF, Full Wave, Half Wave+, Half Wave -
