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Model 3542RA
Averaging Axial Extensometers
Designed for compressive strength tests on rock, concrete and other large compression samples, the 3542RA measures axial strain on opposite sides of the test specimen, and the output is an average of the two readings. Gage lengths from 1 to 8 inches (25 to 200 mm) and measuring ranges from .050 to .250 inches (1.2 to 6 mm) are available. The Model 3542RA is available in a variety of configurations. All are self-supporting on the specimen and mount very easily. For tests where a single diameter specimen is typically used, the fixed diameter Model 3542RA1 is recommended. For applications where a continuously adjustable diameter extensometer is required, the Model 3542RA2 is available. If desired, the two readings can be independent, providing two outputs. Many rock tests are done in tri-axial pressure vessels. Epsilon has versions for use in oil to 1360 bar at 200 °C (20,000 psi at 400 °F). These will fit in unusually small inside diameter vessels. For small diameter specimens, we suggest the Model 3442RA1 averaging axial extensometer. All Model 3542RA extensometers are designed so they may be used together with the Model 3544 circumferential or 3975 diametral extensometer. Epsilon’s rock extensometers can withstand the punishment of daily, high volume testing. Some units have been used for several thousand tests without damage. The included conical point contacts are made from tungsten carbide. Contact Epsilon for help with configuring a system to meet your test needs. A PDF document containing specifications on the 3542RA can be downloaded from the following link: PDF DOWNLOAD. For price, delivery or other information, please click here to submit our information request form. Features:
May be used simultaneously with Model 3544 circumferential extensometers or Model 3975 diametral extensometer. Specifications:Excitation: 5 to 10 VDC recommended, 12 VDC or VAC max. Output: 2 to 4 mV/V nominal, depending on model Linearity: ≤0.20% of full scale measuring range, depending on model Temperature Range: Standard (-ST) is -40 °C to +100 °C (-40 °F to 210 °F) Cable: Integral, ultra-flexible cable, 8 ft (2.5 m) standard Specimen Size: Wide range of specimen sizes available, including AX, BX, NX and larger, to 8 inches (and 200 mm) diameters standard (larger sizes on special order) Operating Force: <30 g typical per side Options:Fixed or variable diameter configurations Dual, independent outputs Connectors to interface to nearly any brand test equipment Model 3542RA Extensometer Standard Versions:ANY combination of gage length, measuring range and temperature range listed below is available, except as noted. Test specimen diameter(s) must be specified at the time of order.
Example: 3542RA1-100M-600M-ST: Fixed size, 100 mm gage length, 6.0 mm measuring range, standard temperature option (-40 °C to 100 °C) Contact InformationFor price, delivery or other information, please click here to submit our information request form.Telephone: 307-733-8360 FAX 307-733-8375 Address 3975 S. Highway 89, Jackson, WY 83001 USA e-mail: General Information: info@epsilontech.com
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