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Uniaxial & Triaxial Accelerometer

Brand: Reftek Systems Inc
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The 147 Low Noise Accelerometer uses a state of the art force balance feedback technique to improve performance characteristics over conventional accelerometers.

It is +/-4g full scale and has excellent dynamic range. Make the most of the dynamic range available by combining it with a 24-bi digitizer such as the Wrangler and the 130-MC Recorder.

The 147 High-Resolution Accelerometers are a force‑balance accelerometer that converts acceleration signals into voltage signals to measure various low frequency and ultra-low frequency motion. 

The 147 accelerometer is available in both triaxial and uniaxial packages.

The 147 accelerometer force balance feedback technique overcomes the shortcomings of nonlinear distortion and threshold of sensitivity of elastic measuring parts. 

The advanced features of the 147 accelerometer include high sensitivity, large linear range, high resolution, and high dynamic range. The 147 accelerometer has DC response.

High sensitivity, large linear range, high resolution, and high dynamic range make the 147 model best suited for free field applications such as micro zonation, site response, earthquake monitoring, and more. 

The 147 housing is sealed to meet IP67 standards for watertight integrity. For the triaxial package, mounting is accomplished with a single bolt, and 3 point leveling.
Features
  • State-of-the-art, high resolution, force-balance Accelerometer
  • Acceleration signals can be converted to Voltage to measure low & ultra-low frequency motion
  • Low noise
  • Sensitivity and offset stable over a wide temperature range
  • Available in uniaxial and triaxial configurations

1 - 8 of 8 Part Numbers
97499-20
97499-20
147A-01/3: Accelerometer, Triaxial, Low Noise, with mounting kit
97499-30
97499-30
147A-01/3: Accelerometer, Triaxial, Low Noise, with mounting kit and 10m cable to 130 DAS
98082-00
98082-00
Accelerometer Cable, 147A to 130 DAS, 33 ft
98082-100
98082-100
Accelerometer Cable, 147A to 130 DAS, 100 ft
98082-150
98082-150
Accelerometer Cable, 147A to 130 DAS, 150 ft
98082-200
98082-200
Accelerometer Cable, 147A to 130 DAS, 200 ft
98082-250
98082-250
Accelerometer Cable, 147A to 130 DAS, 250 ft
98082-50
98082-50
Accelerometer Cable, 147A to 130 DAS, 50 ft
1 - 8 of 8 Part Numbers

Specifications

Brand

Full-Scale Output

  • ± 4 g

Full-Scale Output

  • ± 10 V differential, 20 VPP

Sensitivity

  • 2.5 V/g

Self-Noise

  • < 1 μm/s/s

Dynamic Range

  • > 155 dB (DC to 10 Hz)

Linearity

  • < 0.1 %

Frequency Response

  • Flat DC-100 Hz ± 0.05 dB, DC-250 Hz ± 3 dB

Damping

  • 0.7

Self-test Response

  • Logic level input will produce consistent g level output

Lightning Protection

  • Built-in surge protection

Cross Axis Sensitivity

  • < 1 %

Hysteresis

  • < 0.1 % of Full Scale

Thermal Drift

  • ≤ 600 μg/°C

Average Power

  • < 1 W Triaxial Version

Power Supply

  • +9 to +18 Vdc

Operating Temperature

  • -4° F to 140° F (-20° C to 60° C)

Storage Temperature

  • -40° F to 185° F (-40° C to 85° C)

Humidity

  • 0 - 100 % not-condensing

Watertight Integrity

  • IP67

Shock

  • Survives a 1 meter drop on any axis

Dimensions

  • 4.9 W x 5.3 L x 3.85 H inches (12.5 x 13.5 x 9.8 cms) Height without connector 3.25 inches (8.25 cms)

Weight

  • 4.4 lb (2 kg)

  • Free Field Reference
  • Building Arrays
  • Structural Monitoring
  • Site Response
  • Aftershock Studies

Documentation

Data Sheet

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