| Because of its low weight and small dimensions, Type 4391 is well suited for off-line monitoring and for use in permanent vibration monitoring installations where installation space is limited. The base is isolated to prevent ground loops. The "shear" construction of the accelerometer significantly reduces transient temperature and base strain outputs. At the same time a high mounted resonance is maintained, together with a high operating temperature. Specifications:
| Sensitivity: | 1 pC/ms-2 +/-2% | | Type of accelerometer: | Charge | | Measuring range (peak): | 20.000 ms-2 | | Resonant frequency (typical): | 40 kHz | | Frequency Response +10%: | 0.1 Hz to 12 kHz | | | | | Shock Limit: | 20.000 ms-2 | | Sinusoidal Vibration Limit: | 20.000 ms-2 | | Temperature range: | -60 to +180 °C | | Mounting size: | 10-32 UNF | | | |
