Extech Digital Thickness Gauges
The Extech thickness gauges are designed in a compact and rugged housing ideal for field use.
Features
- Multiple transducer options for high temperature and difficult to measure materials
- Fast minimum feature to capture minimum thicknesses
- Sunlight readable dot-matrix display with backlight
- Free ground shipping
- Expedited repair and warranty service
- Lifetime technical support
- More
The Extech TKG series of ultrasonic, portable thickness gauges are specifically designed to measure the remaining wall thickness of primarily steel structures. The TKG100 is a base gauge offering a simple user interface in the custom molded high-density plastic case with rubber keypad. It offers reliable, accurate thickness readings. The TKG150 contains all of the same features as the TKG100, along wih a 50,000 reading datalogger capacity with complete setup tracking, an echo to echo option to reduce coating errors, and a vibrate on alarm function. The TKG250 includes all of the features of the two previous models, in addition to a color LCD display that shows red, yellow, and green visual alarm indications. It also offers a gain adjustement and automated transducer replacement notification feature.
The TKG250 includes all of the features of the two previous models, in addition to a color LCD display that shows red, yellow, and green visual alarm indications. It also offers a gain adjustement and automated transducer replacement notification feature.The B-scan function displays a visual cross section of inspection area with no correlation to distance. TKG250's file compare feature can serve as a real-time corrosion monitor.When powering on, the gauge does an automatic zeroing of the transducer, thus eliminating the need for an on-block zero. This feature ensures the transducer is working in accordance with electronic zeroing procedures, particularly important on high temperature materials.
These pressure gauges are ideal for measurements in boiler tubes, pressure vessels, storage tanks, ship hulls, containers, home oil tanks, pipes, steam lines, compressors, shafts, bridge pins, and bond inspections.
- Thickness Range (In Steel): 5MHz probe: 0.040 to 20" (1.0 to 508mm); 10MHz probe: 0.020 to 20" (0.50 to 508mm)
- Material Velocity Calibration Range: 0.200 to 0.7362 in/μS (0.508 to 18.699mm/μS)
- (1) Pressure gauge
- (1) 2oz bottle of couplant
- (2) AA batteries
- (1) Transducer with potted cable
- (1) Hard carrying case
- (1) Protective holster (TKG150 and TKG250 only)
- (1) USB cable (TKG150 and TKG250 only)
- (1) Extech XPorter software (TKG150 and TKG250 only)
In The News
From Pans to Buoys: Advancing Reservoir Evaporation Rate Monitoring in Texas
In warmer climates like Texas, high reservoir evaporation rates can lead to declines in water level and water availability during droughts, making monitoring essential in order to ensure water security during times of scarcity. 
 
According to the Texas Water Development Board (TWDB), evaporation rates in Texas were previously based on data collected from a sparse network of Class A evaporation stations, dating back to the 1960s. These pans were stationed near reservoirs and still remain a widely accepted standardized approach to measuring evaporation rates on land. 
 
Monthly pan-to-lake coefficients were developed in the 1980s to connect the data collected from the pans to known lake conditions, extrapolating evaporation rates of the lakes using the pan data.
Read MoreA Drop in the Ocean: Restoring London’s Tidal Thames
The United Kingdom has grappled with wastewater management problems for decades. Although sewage treatment in the 20th century allowed many rivers, including the tidal Thames, to have healthy fish populations, combined sewer overflows into rivers–most commonly during heavy rainfall–affected water quality and occasionally even killed fish. 
 
Problems reached a head in 2012 when multiple infractions of European urban wastewater treatment laws threatened costly fines, on top of the environmental cost of repeated sewage spills into British rivers. 
 
Fast forward to 2025, and after a decade of construction work, London’s Thames Tideway Tunnel , affectionately dubbed the “super sewer”, is now fully activated and ready for testing.
Read MoreHave You Heard? AI Buoys Revolutionizing Marine Mammal Monitoring in Whangārei Harbor, New Zealand
In one history, Whangārei Harbor, nestled in the lush hills of New Zealand’s North Island, gets its name from the Māori, “waiting for the breastbone of the whale.” It seems fitting, then, that it’s now home to state-of-the-art acoustic monitoring buoys listening for marine mammals around the clock. 
 
In September 2024, a team from Auckland-based underwater acoustics firm Cetaware Ltd installed NexSens buoys in Northport, a major commercial port at the entrance to the Whangārei Harbor. 
 
The first buoys to be installed by Cetaware in a permanent setting running 24/7, they use real-time artificial intelligence (AI) models to passively sense Delphinidae–from common dolphins to orcas. 
 
Dr.
Read More