Uniaxial Force Balanced Velocity meter/ Accelerometer
Model EV-12






The EV-12 is a high sensitivity uniaxial force balance sensor with both velocity and acceleration outputs.

Unlike piezo type sensors, the servo force balance construction offers acceleration frequency to DC. The velocity output has a frequency range of 0.5Hz to 70Hz. It offers low noise, high dynamic range, and is perfectly suited for most strong motion monitoring applications.

The unit can be used either as in horizontal or vertical orientations*.

The EV-12 standard packaging is a small 2-inch cube field case with mounting plate and connector. The sensor elements are housed in an epoxy sealed aluminum case. They are extremely rugged, and designed for long-term deployment in field environments. Unlike solid-state type accelerometers, the EV-12 does not experience significant drifting with temperature changes.

Options include a single side voltage input with differential output for long sensor run applications.



FEATURES
  • Acceleration and Velocity Outputs

  • Low Noise

  • Low Power

  • Rugged

  • High Sensitivity

  • Borehole Configurations

  • Over 120dB Dynamic Range

  • Maintenance Free
SPECIFICATIONS
HIGH SENSITIVITY VELOCITY OUTPUT
Operating principle: Uniaxial Servo Force Balanced design, can be used for horizontal or vertical mounting*
Frequency range: 0.5Hz to 100Hz 3 dB (damping 70% critical)
Measuring range: 10 kine (4 IPS)
Voltage Sensitivity: at least 1V/Kine (2.54 V/ IPS)
Spectral Noise ( for 1/3 octave band ): 1 ~ 70 Hz, < 20i kine ( rms )
HIGH SENSITIVITY ACCELERATION OUTPUT
Operating principle: Uniaxial Servo Force Balanced design, can be used for horizontal or vertical mounting*
Frequency range: DC to 100 Hz +1dB, -3dB
Measuring range: 2 g
Voltage Sensitivity: 5 V/g
Spectral Noise ( for 1/3 octave band ): 1 to 100 Hz, < 1i g (g) (rms)
Dynamic Range: > 120dB
HOW TO ORDER
BasicEV-12 Configuration The standard configuration includes field enclosure, circular connector on case and calibration sheets
Single sided voltage input with differential output option -DO
Crossaxis (0.005 g/g) option -CA5
*Vertical biased for earth's gravity *option -B (Vertical mounting only)
Custom Packaging specify
Recorder Options SMR-4000
SMR-6102
Supplies and Accessories

Sensor Cable
Mating Connector

General Spares None

S Printer Friendly Format For Specifications

ENVIRONMENTAL
Waterproof: Not submersible
Operation Temperature -10 to 50 C
Vibration Survival 10 g p-p, 2 to 2,000 Hz
Shock Survival 1000 g, 1 ms 100 g, 11 ms
Humidity 95% R.H.
MECHANICAL
Housing Standard
Environmental Field Enclosure.
Size 2" cube with mounting plate and circular connector
Weight (Al housing) 250 grams
Connector Mates with PT06A-10-6S
POWER
Power - Standard 12V typ. others optional
Supply current 30 ma
NOISE CURVE

 


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