Vibration Sensors
Piezoelectric sensor
Piezoelectric sensor (Charge type)
- Compression type
-
Compression type has a piezoelectric element fastened by a screw between a piece of weight and the base. Measurement of pretty large shock is possible because of its advanced mechanical strength. The resonant frequency is high for its sensitivity. Therefore, the sensors of this type can be used not only for general applications but also for measurements of the high speed rotational machinery or detection of leakage from the pipe lines.
- ■ Suitable for measurements of high frequency or high acceleration vibrations
- ■ Stable works, advanced linearity
- ■ Wide operating temperature range
-
Shear type is constructed so that each piezoelectric element has shear that is proportional to applied acceleration between the poles. It is useful for low frequency vibration measurement even in the environments of large temperature change because it is hard to be effected by the pyroelectricity. Furthermore, it is less sensitive to the strain in the base.
- ■ Suitable for measurements of high frequency or high acceleration vibrations
- ■ Tough against the temperature changeand disturbance caused by the strain in mounting section
- ■ Covering small and light to high sensitivity
- Bending type
-
Bending type has a construction to get the signal from the piezoelectric elements glued on a metal plate which is bent being applied an acceleration. This is light weight and has high acceleration sensitivity to be suitable to monitor earthquakes or small vibration of the testing models of dam, power station or small equipments, for example.
- ■ Small size, light weight, high sensitivity
- ■ Stable works, advanced linearity
Dual-line output charge amplifier
Dual-line output charge amplifier is a charge/voltage converter which converts charge output of sensor to voltage with low impedance. It operates being supplied current by measurement equipment with a constant current source.The output signal is obtained superposed on the current supply.
- Application
- 1. In the case of distance between a measurement
instrument and a charge-type sensor.
*Adopting Commercially available coaxial cable enable cost reduction and high noise-resistance.
2. Usable when measurement spot is high temperature
and unable to use the sensor with built-in pre-amplifier.
3. For use with charge type sensor and FFT
analyzer equipped with a constant current supplier.
Piezoelectric sensor（Built-in pre-amplifier type）
This is a piezoelectric sensor which has a built in charge amplifier to output a low output impedance voltage signal. Less expensive coaxial cable can be laid long distance with minimum lowering of sensitivity and influence of external noise. It is suitable for vibration monitoring. However, It is not recommendable for use in high temperature, in very high frequency range nor for meauament of very large accleraration.
Features
-
[Frequency response]
Upper usable frequency limit depends on its own resonant frequency or rigidity of mounting. Lower useful frequency is limited by the time constant of the amplifier.
-
[Temperature characteristics]
Acceleration sensitivity of a piezoelectric element is effected by temperature. While such effect is dependent on material and structure, high temperature gives larger capacitance, higher charge sensitivity and smaller voltage sensitivity generally.
-
[Cross axis sensitivity]
Sensitivity to the acceleration applied along the axis of 90° to the sensitive axis is designed to be less than 5%.
Fixing methods
*Bending type should be of stationary or fixed by glue / double-sided adhesive tape.
Product lineup
Outward dimension PDF■Specifications
| Resonance frequency | > 36,000 Hz |
|---|---|
| Frequency range | fc* to 10,000 Hz ±1 dB |
| Charge sensitivity | 1.5 pC/ (m/s2) ±10% |
| Capacitance | 500 pF |
| Maximum allowable acceleration | 20,000 m/s2 |
| Operating temperature range | -30 to ＋150 °C |
| Cable connection | Sidewise 10-32 threaded connector |
| Weight | 8 g |
| Case material | Aluminum (A2017) |
*fc : The value is defined by the time constant of amplifier
■Specifications
| Resonance frequency | > 29,000 Hz |
|---|---|
| Frequency range | fc*1 to 5,000 Hz ±1 dB |
| Charge sensitivity | 5.0 pC/ (m/s2) ±10% |
| Capacitance | 1,200 pF ±20% |
| Maximum allowable acceleration | 5,000 m/s2 |
| Operating temperature range | -30 to ＋150 °C |
| Structure | Insulative and drip proof (Equivalent to IP54*2) |
| Cable connection | Upward TNC connector |
| Weight | 53 g |
| Material | Stainless steel (SUS303) |
*1 fc : The value is defined by the time constant of amplifier
*2 When using the dedicated cable
■Specifications
| Resonance frequency | > 23,000 Hz |
|---|---|
| Frequency range | fc* to 5,000 Hz ±1 dB |
| Charge sensitivity | 5.0 pC/ (m/s2) ±20% |
| Capacitance | 1,000 pF |
| Maximum allowable acceleration | 16,000 m/s2 |
| Operating temperature range | -20 to ＋250 °C |
| Cable connection | Isolated waterproof (Equivalent to IP54) |
| Cable connection | Sidewise 10-32 threaded connector |
| Weight | 42 g |
| Case material | Stainless steel (SUS304) |
*fc : The value is defined by the time constant of amplifier
■Specifications
| Resonance frequency | > 60,000 Hz |
|---|---|
| Frequency range | fc* to 13,000 Hz |
| Charge sensitivity | 0.22 pC/ (m/s2) ±20% |
| Capacitance | 940 pF |
| Maximum allowable acceleration | 10,000 m/s2 |
| Operating temperature range | -20 to +150 °C |
| Cable connection | Sidewise M3 threaded connector |
| Weight | 1.9 g |
| Material | Titanium and aliminum (A2017B) |
*fc : The value is defined by the time constant of amplifier
■Specifications
| Resonance frequency | > 15,000 Hz |
|---|---|
| Frequency range | fc* to 5,000 Hz ±1 dB |
| Charge sensitivity | 10 pC/ (m/s2) ±10% |
| Capacitance | 1,000 pF |
| Maximum allowable acceleration | 3,000 m/s2 |
| Operating temperature range | -20 to +120 |
| Cable connection | Upward 10-32 threaded connector |
| Weight | 35 g |
| Material | Stainless steel (SUS303) |
*fc : The value is defined by the time constant of amplifier
■Specifications
| Resonance frequency | > 15,000 Hz |
|---|---|
| Frequency range | fc* to 7,000 Hz ±1 dB |
| Charge sensitivity | 1.5 pC/ (m/s2) ±10% |
| Capacitance | 1,000 pF ±20% |
| Maximum allowable acceleration | 5,000 m/s2 |
| Operating temperature range | -20 to +150 |
| Cable connection | Sidewise 10-32 threaded connector |
| Weight | 40 g |
| Material | Titanium (TB340H) |
*fc: The value is defined by the time constant of amplifier.
■Specifications
| Resonance frequency | > 30,000 Hz |
|---|---|
| Frequency range | fc* to 10,000 Hz ±1 dB |
| Charge sensitivity | 1.5 pC/ (m/s2) ±10% |
| Capacitance | 1,000 pF ±20% |
| Maximum allowable acceleration | 20,000 m/s2 |
| Operating temperature range | -20 to +150 °C |
| Cable connection | Upward 10-32 threaded connector |
| Weight | 12 g |
| Material | Stainless steel (SUS303) |
*fc : The value is defined by the time constant of amplifier
■Specifications
| Resonance frequency | > 35,000 Hz |
|---|---|
| Frequency range | fc* to 10,000 Hz |
| Charge sensitivity | 0.16 pC / (m/s2) ±20% |
| Capacitance | 440 pF |
| Maximum allowable acceleration | 50,000 m/s2 |
| Operating temperature range | -20 to +160 °C |
| Cable connection | Sidewise M3 threaded connector |
| Weight | 5.2 g |
| Material | Titanium |
*fc : The value is defined by the time constant of amplifier
■Specifications
| Resonance frequency | > 12,000 Hz |
|---|---|
| Frequency range | fc* to 3,500 Hz ±1 dB |
| Charge sensitivity | 35 pC/ (m/s2) ±10% |
| Capacitance | 1,500 pF ±20% |
| Maximum allowable acceleration | 1,500 m/s2 |
| Operating temperature range | -20 to +120 |
| Cable connection | Sidewise 10-32 threaded connector |
| Weight | 100 g |
| Material | Stainless steel (SUS303) |
*fc : The value is defined by the time constant of amplifier
■Specifications
| Resonance frequency | > 30,000 Hz |
|---|---|
| Frequency range | fc* to 10,000 Hz ±1 dB |
| Charge sensitivity | 3.0 pC/ (m/s2) ±10% |
| Capacitance | 1,500 pF |
| Maximum allowable acceleration | 9,800 m/s2 |
| Operating temperature range | -40 to +160 °C |
| Cable connection | Sidewise 10-32 threaded connector |
| Weight | 24 g |
| Material | Stainless steel (SUS303) |
*fc : The value is defined by the time constant of amplifier
■Specifications
| Resonance frequency | > 60,000 Hz |
|---|---|
| Frequency range | fc* to 13,000 Hz ±1 dB |
| Charge sensitivity | 0.035 pC/ (m/s2) ±20% |
| Capacitance | 340 pF |
| Maximum allowable acceleration | 100,000 m/s2 |
| Operating temperature range | -50 to ＋160 °C |
| Cable connection | Sidewise 10-32 threaded connector |
| Weight | 0.2 g |
| Case material | Titanium |
*fc : The value is defined by the time constant of amplifier
■Specifications
| Resonance frequency | > 50,000 Hz |
|---|---|
| Frequency range | fc* to 10,000 Hz ±1 dB |
| Charge sensitivity | 0.04 pC/ (m/s2) ±20% |
| Capacitance | 250 pF |
| Maximum allowable acceleration | 50,000 m/s2 |
| Operating temperature range | -50 to ＋160 °C |
| Cable connection | Sidewise direct 10–32 with receptacle |
| Weight | 1.2 g |
| Case material | Titanium |
*fc : The value is defined by the time constant of amplifier
■Specifications
| Resonance frequency | > 26,000 Hz |
|---|---|
| Frequency range | fc* to 7,000 Hz ±1 dB |
| Charge sensitivity | 5.0 pC/ (m/s2) ±10% |
| Capacitance | 1,000 pF ±20% |
| Maximum allowable acceleration | 5,000 m/s2 |
| Operating temperature range | -20 to +150 °C |
| Cable connection | Upword 10-32 threaded connector |
| Weight | 23 g |
| Material | Stainless steel (SUS303) |
*fc : The value is defined by the time constant of amplifier
■Specifications
| Resonance frequency | > 25,000 Hz |
|---|---|
| Frequency range | fc* to 7,000 Hz ±1 dB |
| Charge sensitivity | 5.0 pC/ (m/s2) ±10% |
| Capacitance | 1,000 pF |
| Maximum allowable acceleration | 10,000 m/s2 |
| Operating temperature range | -20 to +120 °C |
| Cable connection | Upword 10-32 threaded connector |
| Weight | 45 g |
| Material | Stainless steel (SUS303) |
*fc : The value is defined by the time constant of amplifier
■Specifications
| Resonance frequency | > 3,000 Hz |
|---|---|
| Frequency range | fc* to 1,000 Hz ±1 dB |
| Charge sensitivity | 3.5 pC/ (m/s2) ±20% |
| Capacitance | 1,000 pF |
| Maximum arrowable acceleration | 2,000 m/s2 |
| Operating temperature range | -20 to +80 °C |
| Cable connection | Sidewise M3 threaded connector |
| Weight | 0.9 g |
| Material | Aluminum (A5052) |
*fc : The value is defined by the time constant of amplifier
/ Shear type product lineup
VP-4031IW
■Specifications
| Resonance frequency | Above 50,000 Hz |
|---|---|
| Frequency range | 1 to 13,000 Hz ±3 dB |
| Voltage sensitivity | 1 mV/(m/s2) ±10% at 160 Hz |
| Maximum measurable acceleration | 5,000 m/s2 |
| Power supply | Constant current: 2 to 10 mA Voltage: 21 to 30 VDC |
| Operating temperature range | -54 to +80°C (Constant current 2 to 10 mA) -54 to +120°C (Constant current 2 to 5 mA) |
| Cable connection | Connector (Lateral direction) Dedicated cable “C-4031IW-3” included as standard |
| Weight | Approx. 0.6 g (sensor only) |
| Material | Aluminum |
/ Shear type product lineup
VP-A1P0
■Specifications
| Resonance frequency | > 40,000 Hz |
|---|---|
| Frequency range | 3 to 12,000 Hz |
| Voltage sensitivity | 1 mV/ (m/s2) ±10% |
| Maximum measurable acceleration | 3,000 m/s2 |
| Power supply | 0.5–5 mA constant current, voltage 15–25 V |
| Operating temperature range | -30 to +110 °C |
| Cable connection | Upward M3 threaded connector |
| Weight | 1.9 g |
| Material | Titanium |
/ Shear type product lineup
VP-A1P1
■Specifications
| Resonance frequency | > 35,000 Hz |
|---|---|
| Frequency range | 10 to 8,000 Hz |
| Voltage sensitivity | 10 mV/ (m/s2) ±10% |
| Capacitance | 300 m/s2 |
| Maximum allowable acceleration | 0.5–10 mA constant current, voltage 15–36 V |
| Operating temperature range | -50 to +110 °C |
| Cable connection | Sidewise 10-32 threaded connector |
| Weight | 10 g |
| Material | Titanium |
/ Shear type product lineup
VP-A1P1Z
■Specifications
| Resonance frequency | > 35,000 Hz |
|---|---|
| Frequency range | 3 to 5,000 Hz |
| Voltage sensitivity | 10 mV/ (m/s2) ±10% |
| Maximum measurable acceleration | 500 m/s2 |
| Power supply | 0.5–10 mA constant current, voltage 21–24 V |
| Operating temperature range | -50 to +110 ﾟC (5mA) /-50 to +70 ﾟC (10mA) |
| Cable connection | Sidewise dedicated connector |
| Weight | 11 g |
| Material | Titanium |
safetyBuilt-in pre-amplifier
/ compression type product lineup
HS-100I
■Specifications
| Resonance frequency | > 32,000 Hz |
|---|---|
| Frequency range | 2 to 10,000 Hz ±10% |
| Voltage sensitivity | 50 mV/G ±10% |
| Maximum measurable acceleration | 1,568 m/s2 |
| Power supply | 0.5 to 8 mA constant current, voltage 15 to 30 V |
| Operating temperature range | -20 to +80 °C |
| Structure | Instrinsic safety (Ex iaⅡC T4 Ga) |
| Cable connection | M12 connector |
| Weight | 106 g |
| Material | Stainless steel (SUS303) |
proofBuilt-in pre-amplifier
/ compression type product lineup
VP-A52IW
■Specifications
| Resonance frequency | > 35,000 Hz |
|---|---|
| Frequency range | 3 to 10,000 Hz ±3 dB |
| Voltage sensitivity | 5 mV/ (m/s2) ±10% |
| Maximum measurable acceleration | 700 m/s2 |
| Power supply | 0.5 to 10 mA constant current, voltage 12 to 30 V |
| Operating temperature range | -30 to +110 °C |
| Structure | Insulative and water proof |
| Cable connection | Upward TNC connector |
| Weight | Approx. 49 g |
| Material | Stainless steel (SUS303) |
accelerationBuilt-in pre-amplifier
/ compression type product lineup
VP-A12IW
■Specifications
| Resonance frequency | > 50,000 Hz |
|---|---|
| Frequency range | 3 to 10,000 Hz ±3 dB |
| Voltage sensitivity | 1 mV/ (m/s2) ±10% |
| Maximum measurable acceleration | 3,500 m/s2 |
| Power supply | 0.5 to 5 mA constant current, voltage 12 to 30 V |
| Operating temperature range | -30 to +110 °C |
| Structure | Insulative and drip proof (Equivalent to IP54*) |
| Cable connection | Upward TNC connector |
| Weight | 44 g |
| Material | Stainless steel (SUS303) |
* When using the dedicated cable
charge amplifier
PA-2
■Specifications
| Gain | -1 mV/pC ±2% |
|---|---|
| Power supply | 0.5 to 5 mA constant current, voltage15 to 30 V |
| Frequency range | 2 to 50,000 Hz（In the case of 1,000 pF） |
| Maximum output voltage | > 3.5 Vp |
| Output impedance | > 20 Ω |
| Operating temperature range | -20 °C to ＋70 °C (No freezing） |
| Noise threshold | > 20 μVrms |
| Cable connection | BNC connector |
| Weight | Approx. 30 g |
| Ground | Housing |
| Material | Aluminum |