Frequently Asked Questions (FAQs)

Q&A about purchase

Yes, you can.

Yes, you can.

Purchases start from a single unit.

Please feel free to contact us for a quotation request.

Generally, the lead time for piezoelectric elements with a standard shape is about 2 to 2.5 months.
For sensors, the lead time varies depending on the model, but it is typically around 1.5 months.
Please contact us for more specific information.

About the Piezoelectric Element Product Group / Piezoelectric Application Product Group

No mold cost is required as we make prototype elements using existing molds with additional machining.

Q&A About Products

About Piezoelectric Element Product Group/Piezoelectric Application Product Group

We offer standard products for the following items.
 Piezoelectric Element Group: Multilayer piezoelectric actuators, composite piezoelectric ceramics
 Piezoelectric Application Product Group: Airborne ultrasound sensors, Langevin ultrasonic transducers, humidifier vibrators, ultra-sensitive air pressure sensors

No, we do not rent samples.

Products should be stored in an environment with minimal temperature fluctuations and avoid exposure to the atmosphere.
Slight discoloration will occur due to the nature of the electrodes. However, keeping them in a desiccator (moisture-proof cabinet) can delay the onset of such discoloration.

No, we do not, but we can refer you to manufacturers of such products.

No, we do not, but we can refer you to manufacturers of such products.

No, we do not sell them because we discontinued production.

About the Piezoelectric Sensor Group

We have extensive design experience. Please feel free to contact us for inquiries.
We will examine the feasibility of your design and contact you.

Theoretically, it is possible to use our sensors in a vacuum, but dust emitted from the sensors may contaminate the vacuum environment.

We recommend customers calibrate our sensors once a year.
We offer a pick-up and return calibration service.

Due to the absence of electronic parts inside, charge output type accelerometers can be used at high temperatures (up to 250ºC) and are suited for measuring high acceleration.
On the other hand, built-in pre-amplifier type accelerometers do not require an external preamplifier, enabling the use of a general-purpose coaxial cable to connect to the measuring instrument and thus simplifying the configuration of the measurement system.

You can use line-drive-type constant-current power supply "CCPS-3" and "CGCCPS-3."
In recent years, some measuring instruments have a built-in line-drive-type constant-current power supply, making it possible to drive charge converters and built-in pre-amplifier type accelerometers by simply connecting them to such measuring instruments.

Please select the most suitable installing method depending on the measurement environment and method from options such as standard stud mount, adhesive mount, insulation stud mount, magnetic holder mount, and other installing methods.

Please use instant adhesive for temporary installing methods in which sensor removal is expected.
We recommend using a two-part epoxy resin adhesive for permanent installing methods.

It is essential to finish the mounting surface flat and ensure that the sensor adheres to the flat surface tightly.
Applying silicone oil or grease to the contact surfaces can increase the adherence of the sensor to the flat surface.

Whereas accelerometers measure signals in the vibration range of approximately 30kHz or less, AE sensors measure signals in the ultrasonic range between 20kHz and several MHz.

Generally, when the frequency to be measured is known, select the resonance model. When it is unknown, select the wide bandwitdh model.

Because AE signals are extremely weak, AE sensors detect signals using the mechanical resonance of detection elements to achieve high-sensitivity.
Different sensor models are used to select AE sensors depending on the frequency of targeted AE signals.

Although the sensitivity deviates from the specified value outside the frequency range of wide bandwitdh model AE sensors, the sensor outputs in response to the intensity of AE signals.

The advantage of amplifier built-in type AE sensors is that the preamplifier built into the sensor case blocks noises that enter between the detection element and the preamplifier, improving the S/N ratio.
The disadvantage of amplifier built-in type AE sensors is that the amplification factor is fixed, unlike the external preamplifier.
In addition, these sensors can no longer make the system configuration complex, such as adding filters.

20dB-gain preamplifiers should be driven at 15V (a load of 75Ω), and 40dB-gain preamplifiers should be powered at 28V (a load of 50Ω).

Piezoelectric force sensors are smaller, more rigid, and more durable than strain-gauge-type load cells, enabling the measurement of micro to large loads.
Piezoelectric force sensors are suited for dynamic load measurement due to their excellent responsiveness, but they are not suited for static load measurement due to their self-discharge characteristic.
The output voltage changes along an exponential curve depending on the electric discharge time constant, resulting in a zero shift.
However, increasing the electric discharge time constant using a dedicated charge amplifier would enable quasistatic load measurement.

Crystals are a monocrystalline piezoelectric material having higher mechanical strengths and better temperature characteristics than piezoelectric ceramics.
For this reason, crystals are used for force sensors directly subject to external forces (loads).

Charge output type force sensors can measure micro to large loads with only a single sensor by adjusting the amplification factor of the connected charge amplifier, making it suitable for research and development applications.
These force sensors can also measure loads.
On the other hand, amplifier built-in type force sensors are used only for dynamic load measurement.
These force sensors are cheaper than charge output type force sensors, making them suitable for manufacturing-process monitoring purposes, such as terminal crimping force monitoring.

Charge output type force sensors can detect a change of 0.01N.
However, these force sensors are significantly noise-sensitive, requiring appropriate processing such as signal filtering.

Applying a preload to force sensors makes it possible to measure tensile and shear forces as well.
In addition, the preloading makes the contact between the sensor and its mounting seat tighter, improving force transmission at the interface and enabling stable measurement even under low loads.

The preload value should be set to eight to ten times the shear force applied.
However, the preload value must not exceed the sensor's maximum measurement range.
 [Measurement range in the Z-axis direction (compressive force)] = [Sensor's maximum measurement range] - [Preload value]
 [Measurement range in the Z-axis direction (tensile force)] = [Preload value]
 [Measurement range in the X/Y-axis direction (allowable shear force)] = 0.1 to 0.125 x [Preload value]

Inquiries
Please contact us here for inquiries about
FUJI CERAMICS' products and company information.

Overseas Sales Section.
+81-544-58-4466

Service hours: Monday to Friday 9:00 to 17:00
(Closed Saturdays, Sundays, and holidays)