Horizontal geophone HV

verticalindustrialhigh-sensitivity

Product overview
The VAS-HV series are vertical and horizontal low-frequency geophones designed for vibration measurement in engineering applications and rotating machinery monitoring. Five model variants cover natural frequencies from 7.2 Hz to 11.5 Hz, enabling longitudinal and transverse measurements across medium-low frequency bands.

Applications

• Vibration monitoring of large rotating equipment (generators, turbines)
• Core sensors for handheld vibration meters and field survey instruments
• Structural, environmental and engineering vibration testing in medium-low frequency ranges

Product category
Medium Frequency (4.5 Hz–14 Hz)

Key specifications (summary)

• Series: VAS-HV series geophones (vertical and horizontal)
• Models: VAS-HV-28.5A, VAS-HV-40, VAS-HV-201, VAS-HV-301, VAS-HV-401, VAS-HV-501
• Natural frequency (by model): approx. 7.2–11.5 Hz
• Sensitivity (by model): approx. 20–50 V/m/s
• Coil resistance (by model): approx. 1625–3200 Ω
• Damping ratio (by model): approx. 0.45–0.67
• Maximum motion: 2 mm
• Moving mass: approx. 10.2–11.4 g
• Dimensions (diam. × height): 25.4 mm × 36–45 mm (model dependent)
• Operating temperature: -40 °C to +70 °C
• Warranty: 1 year (exclusions apply)

Detailed model highlights

• VAS-HV-28.5A — Natural frequency: 8.2 Hz; Sensitivity: 28.5 V/m/s; Coil resistance: 2250 Ω; Damping: 0.58
• VAS-HV-40 — Natural frequency: 11.5 Hz; Sensitivity: 40 V/m/s; Coil resistance: 1625 Ω (5100 Ω option noted); Damping: 0.67
• VAS-HV-201 — Natural frequency: 7.2 Hz; Sensitivity: 20 V/m/s; Coil resistance: 2250 Ω; Damping: 0.58
• VAS-HV-301 — Natural frequency: 8.5 Hz; Sensitivity: 30 V/m/s; Coil resistance: 2250 Ω; Damping: 0.58
• VAS-HV-401 — Natural frequency: 8.0 Hz; Sensitivity: 40 V/m/s; Coil resistance: 3200 Ω; Damping: 0.50
• VAS-HV-501 — Natural frequency: 8.2 Hz; Sensitivity: 50 V/m/s; Coil resistance: 2250 Ω; Damping: 0.45

Notes
Damage caused by high voltage or physical impact is not covered by the warranty. Product specifications may be updated without prior notice.