Ref: EQ Series

Triaxial seismic accelerometer - ±3g and ±5g - IP67

1, 2 or 3 axis seismic accelerometer
Measuring range: ± 3g or ± 5g
Accuracy: < 0.5% of the measuring range
Resolution < 700 ng
Output: ± 2.7VDC
Bandwidth: 0 Hz to 550 Hz (DC coupled)
Spectral noise density: from 0.8 to 1.2 µg/√Hz
IP67 Aluminium housing
Supply: 5 to 40 VDC
Temperature: from -40 to +85 °C
Temperature output included
4-pin cable output, 6 m length as standard
TEDS optional

Description

The seismic accelerometers of the EQ series meet the requirements for class B earthquake detection. Available in single-, dual- and triaxial versions, they combine a resolution (700 ng) and an ultra-low noise level (spectral noise density: from 0.8 to 1.2 µg/√Hz), an extended bandwidth for this amplitude level (0-550 Hz to 0-700 Hz), and thus meet the requirements of class B of seismic measurements. The integrated electronic circuit provides a differential analog voltage output (± 2.7 V FSO) for a supply voltage of 5 to 40 VDC.

Installation and use

The output signal of the EQ series seismic accelerometers (±2.7VDC) is independent of the supply voltage (5 to 40 VDC). The housing is hardened, hermetic IP67 (aluminium version) or IP68 (steel version), with an operating temperature range of -40 to +85°C. Mounting is done by screwing onto the support to be monitored. The cable is detachable, for greater flexibility and modularity.

The accelerometer also has a diagnostic function to check proper operation after installation.