Geophone SM-24

The SM-24 geophone converts ground vibrations into a voltage. The voltage is proportional to the velocity of the ground movement, 28.8 V per m/s. The vertical element is built for seismic measurements and covers 10 to 240 Hz. Operation on an Arduino requires an amplifier circuit, see documentation.

Features:

• Vertical element, natural frequency 10 Hz
• Usable up to over 240 Hz
• Distortion below 0.1 %
• Natural frequency applies up to 10° tilt
• Two solder pins on top, printed BH24

Application Examples:

• Detecting vibrations and footsteps
• Seismic experiments and measuring ground vibrations
• Vibrations of buildings and machines in the 10 to 240 Hz range

Documentation:

• SM-24 datasheet
• Geophone SM-24 product page (SparkFun)
• Amplifier and Arduino software for geophones (GitHub)

Technical Data:

• Type: SM-24
• Manufacturer SKU: SEN-11744 (SparkFun)
• Natural frequency: 10 Hz ±2.5 %
• Bandwidth: 10 to 240 Hz
• Sensitivity: 28.8 V/m/s ±2.5 %
• Coil resistance: 375 Ohm ±2.5 %
• Damping: 0.25 open, 0.6 with 1339 Ohm in parallel
• Moving mass: 11 g
• Coil excursion: at most 2 mm
• Operating temperature: -40 °C to 100 °C
• Dimensions: diameter 25.4 mm, height 32 mm
• Weight: 74 g

Scope of Delivery:

• 1× Geophone SM-24