Model 3442RA1 Miniature Averaging Axial Extensometers

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Model 3442RA1 Miniature Averaging Axial Extensometers

Product catalog summary

Features:

Full bridge, 350 ohm strain gaged design compatible with most test systems.
High accuracy with averaging output or optional dual independent outputs.
Meets ASTM class B-1 and ISO 9513, class 0.5 accuracy requirements.
Rugged dual flexure design for enhanced strength and performance.
Includes a high-quality foam-lined case for protection.
Easy mounting with integral springs, self-supporting on specimens.
Designed for smaller diameter specimens.

Specifications:

Excitation: 5 to 10 VDC recommended, 12 VDC or VAC max.
Output: 2 to 4 mV/V nominal, model-dependent.
Linearity: ≤0.20% of full scale measuring range, model-dependent.
Temperature Range: Standard (-ST) is -40 °C to +100 °C (-40 °F to 210 °F).
Cable: Integral, ultra-flexible, 8 ft (2.5 m) standard.
Operating Force: <30 g typical per side.

Options:

Connectors for various test equipment brands.
Shunt calibration module available.
Dual independent outputs option.

Ordering Information:

Model 3442RA Extensometer available in various configurations of gage length, measuring range, and temperature range.
Example: 3442RA1-0200-050T-ST: 2.0 inch gage length, 0.050 inch measuring range, standard temperature option.

Design and Application:

Designed for compressive strength tests on small rock, concrete, and other small compression samples.
Measures axial strain on opposite sides of the specimen, averaging the two readings.
Available for samples 2 inches (50 mm) or smaller in diameter, self-supporting and easy to mount.
Conical point contacts made from tungsten carbide.
Versions available for use in oil up to 20,000 psi at 400 °F (1360 bar at 200 °C).
Compatible with electronics for strain gaged transducers, often connected to test machine controllers.
Signal conditioning electronics typically included with test machine controllers or available separately.

Catalog excerpts

Model 3442RA1 Miniature Averaging Axial Extensometers-1

Technology Corp Model 3442RA Extensometer Standard Versions: ANY combination of gagelength, measuring range and temperature range listed below is available, except as noted. Test specimen diameter(s) must be specified at the time of order. Օ Gage Length Measuring Range METRIC METRIC Model 3442RA1 with 50 mm gage length and 1.25 mmmeasuring range. Shown on 30 mm diameter test sample. Օ Output: 2 to 4 mV/V nominal, depending on model Linearity բɤ 0.20% of full scale measuring range, dependingon model Temperature Range Temperature Range: Standard (-ST) is -40 C to +100 а C (-40F to 210 аF) -LT -265 ˚C to 100 ˚C (-450 ˚F to 210 ˚F) > Cable: Integral, ultra-flexible cable, 8 ft (2.5 m) standard -ST -40 ˚C to 100 ˚C (-40 ˚F to 210 ˚F) > Operating Force: <30 g typical per side -HT1 -40 ˚C to 150 ˚C (-40 ˚F to 300 ˚F) -HT2 -40 ˚C to 175 ˚C (-40 ˚F to 350 ˚F) > 1 1 O PTIONS -LHT -265 ˚C to 175 ˚C (-450 ˚F to 350 ˚F) > Connectors to interface to nearly any brand test equipmentShunt calibration module 1 (see page 96) Short term use to 200 ˚ C (400 ˚ F) acceptable. Dual independent outputs Example: 3442RA1-0200-050T-ST: 2.0 inch gagelength, 0.050 inch measuring range, standard temperature option (-40 F to 210 аF) [ 50 mm ]gage length2.2757.7VARIES WITH 2 inchSPECIMEN DIAMETER1.7143.4 Contact Epsilon for your special testing requirements. 3442RA1 WITH 2 OR 50 MM GAGE LENGTH DIMENSIONS:[mm] inches 56 57 >

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