UGC-VE-4209 9 MPx Two-Unit Video Extensometer

Two 400 mm 9 MPx units stacked into one continuous field of view

The UGC-VE-4209 is a non-contact optical (video) extensometer from the X-Sight 4000 Series, supplied, configured and supported by Universal Grip. It tracks gauge marks on the specimen with two 9 MPx cameras and reports strain, total length, delta length and angle in real time, so it can stay on the specimen through break with no knife edges to slip or damage. Two 4000 Series units with a joined calibration grid nearly double the measuring length, for very long or highly elongating specimens such as elastomers, films and wire.

 

Measuring length, accuracy class and sampling rate

Per ISO 9513 the UGC-VE-4209 measures 2 × 220 mm at Class 0.5, 820 mm at Class 1 and 1680 mm at Class 2. Class 0.5 is the tight class labs choose for modulus and proof-strength work; ISO 6892-1 calls for Class 1 or better for yield and proof strength and allows Class 2 for elongation after fracture.

Typical sampling is 75 Hz (32 Hz with the full image), and narrowing the view width raises it to 1 kHz. Higher pixel counts trade frame rate for field of view: at this resolution the camera favours reach and resolution over raw speed.

As a sizing check: the Class 2 measuring length of 1680 mm is long enough to follow a gauge section of about 1.7 m, to measure several gauge lengths on one long specimen, or to watch more than one specimen at once. We confirm the usable field from your specimen, grips and expected elongation.

 

What the UGC-VE-4209 is best for

• high-elongation elastomers to ASTM D412 and ISO 37

• film and sheet to ASTM D882

• geotextiles to ASTM D4632 and ASTM D4595

• rope, cord and webbing to ASTM D2256

 

Two 400 mm units for very long fields of view

Two 4000 Series units, each with its own 400 mm LED, are stacked and joined with one calibration grid into a continuous field of view. Each unit weighs 2.5 kg. Use it when a single camera cannot cover the full elongation, for example on rubber, film, wire and long cables.

 

Choosing the lens and working distance

Measuring length, lens focal length and working distance are linked: choose two and the third follows. For the Class 0.5 field of view (2 × 220 mm high by 116 mm wide) the working distances are 12 mm lens 169 mm, 16 mm lens 233 mm, 25 mm lens 378 mm, 35 mm lens 519 mm, 50 mm lens 720 mm (from the front cover). Longer working distances reduce LED intensity and can need longer shutter times, so tell us your frame and chamber geometry and we will pick the lens.

 

Connects to your testing machine

Strain is streamed live to the test-machine controller over DOLI Binary, MODBUS, HP Video, TCP/IP or RS232, as an analog signal through auxiliary D/A converters, or as an encoder-style quadrature pulse. The JSON and MRT APIs let your test software start and stop measurement, switch methods and set the gauge length. That is how we retrofit video extensometers to Instron, MTS, ZwickRoell, Shimadzu, Test Resources, ADMET and Galdabini frames; see retrofitting a video extensometer to an existing machine.

 

Compare the UGC-VE-4209 with similar models

• UGC-VE-4216: 4000 Series two-unit, 16 MPx, Class 0.5 2 × 330 mm, 70 Hz typical

• UGC-VE-4205: 4000 Series two-unit, 5 MPx, Class 0.5 2 × 130 mm, 175 Hz typical

• UGC-VE-2109: 2000 Series single-camera, 9 MPx, Class 0.5 220 mm, 75 Hz typical

• UGC-VE-2209: 2000 Series dual-camera, 9 MPx, Class 0.5 420 mm, 75 Hz typical

Not sure which model fits? Read how to choose an extensometer, gauge length selection for video extensometers, or compare all models on our video extensometer page.