40 Hz Vertical Geophone with 1m of cable, double clip connector or split spring (single clamp) available upon request.","- SPECIFICATIONS -","Frequency","Natural Frequency (fn): 40 Hz Tolerance: +\/- 5 Hz Max. tilt angle for specified fn: 90° Typical Spurious frequency: >380 Hz","Distortion","Distortion with 0.7 in\/s p.p. coil to case velocity: <0.2% Distortion measurement frequency: 40Hz Max. tilt angle for distortion specification: 90°","Coil Resistance","Standard: 575 ohm Tolerance: +\/- 5%","Sensitivity","Open Circuit Intrinsic Voltage Sensitivity: 42 V\/m\/s Sensitivity with 1500 Ohm shunt resistor: 30.4 V\/m\/s Tolerance: +\/- 5%","Physical Characteristics","Moving mass: 8.2 g Maximum coil excursion p.p.: 1.5 mm Diameter: 27 mm Height: 33.3 mm Weight: 95 g Operating temperature range: -40°C to + 100°C