Fuji Ceramics Co.
Fuji Ceramics FUS Series Low Frequency Type Airborne Ultrasonic Sensor
Manufacturer: Fuji Ceramics Co., Ltd.
Model: FUS Series
Features
- It measures an object’s presence or distance by emitting ultrasonic waves and receiving their reflections.
- The 40 kHz low-frequency type enables long-distance detection over several meters.
- FUS-40BT and FUS-40BR (aluminum) have been updated to FUS-40BT-B and FUS-40BR-B (black).
- FUS-40CT and FUS-40CR are currently unavailable.
Specifications
| Model | FUS-40BT-B Transmitter Type | FUS-40BR-B Receiver Type | FUS-40E Open Type | FUS-110A Transmitter | FUS-200A Transmitter/Receiver | FUS-300A Transmitter/Receiver | FUS-400A Transmitter | FUS-300A-PB Transmitter |
|---|---|---|---|---|---|---|---|---|
| Construction | Shielded Type | Open Type | Transmitter | Integrated Type Transmit / Receive Shared | Integrated Type | Integrated Type | ||
| Nominal Frequency (kHz) | 40 | 40 | 40 | 110 | 200 | 300 | 400 | 300 |
| Transmit Sound Pressure (dB or higher) | 105 | — | — | — | — | — | — | 130mVp-p |
| Receiving Sensitivity (dB or higher) | — | −57 | −43±4 at 30 cm | −54 at 40 cm | −56 at 20 cm | −66 at 15 cm | −74 at 10 cm | — |
| Transmit / Receive Sensitivity | — | — | — | — | — | — | — | — |
| Sound Pressure / Sensitivity Band (kHz or higher) | 2 (100 dB) | 2 (−60 dB) | 2 | 2 | 2 | 2 | 2 | — |
| Electrostatic Capacitance (pF) | 2600 | 2600 | 2000 | 300 | 260 | 200 | 200 | 1700 |
| Directivity (degrees) | 80 | 40 | 80 | 7 | 6 | 6 | 6 | 9–13 |
| Maximum Input Voltage | 100 V (r.m.s.) | — | 50 (Pulse Vp.p.) | — | 100 (Pulse Vp.p.) | — | — | (Pulse Vp.p.) |
| Detection Distance (m) | 0.2–3 | — | 0.2–4 | 0.4–2.5 | 0.2–1.2 | 0.1–1.0 | 0.08–0.3 | — |
| Resolution (mm) | 9 | — | 9 | 3 | 2 | 1 | 1 | 1.2 |
| Operating Temperature Range (°C) | −20~70 | −20~70 | −25~70 | −20~60 | −20~60 | −20~60 | −20~70 | −20~70 |
| Storage Temperature Range (°C) | −40~85 | −40~85 | −40~85 | −35~70 | −35~70 | −35~70 | −20~70 | −40~85 |
| High-Temperature Storage | 80°C 500h | 80°C 500h | 80°C 500h | 70°C 500h | 70°C 500h | 70°C 500h | 85°C 240h | — |
| Low-Temperature Storage | −35°C 500h | −35°C 500h | −35°C 500h | — | — | — | — | — |
| Humidity Resistance | 60°C 85% 10V r.m.s. 500h | — | 60°C 90–95%RH 500h | — | — | — | 60°C 90–95%RH 240h | — |
| Drop Impact Resistance | Wood board drop 1m x3 | Wood board drop 1m x3 | Wood board drop 1m x3 | 10–55 Hz 1 cycle 1.5mm XYZ each 1h | — | 100G 3 times each direction | — | 5Hz–500Hz 10G each direction |
| Outer Dimensions (mm) | φ17.8 | φ16 | φ37 | φ19 | φ13 | φ10 | φ9.9 | φ9 |
| Height (mm) | 11 | 12 | 17.2 | 10.8 | 8.8 | 7.4 | 7.3 | — |
◆ Ultrasonic Sensors
- High acoustic pressure sensitivity
- Compact size, light weight, and solid construction
- High accuracy and reliability
- Low power consumption and economic efficiency
- Resistance to harsh environments such as temperature, humidity, and contamination
◆Operation of Ultrasonic Sensors
- Spatial transmission of signals
- Measurement of signal transmission time
- Detection of continuous signals
- Efficient use of multipath responses
- Measurement of pulse echo time
- Measurement of Kármán vortex flow
◆Sensor Installation Methods
- Single-element reflective type (combined transmission and reception)
- Two-element reflective type (reception only)
- Two-element opposite-facing type (reception only)
◆Precautions for Use
- Sensors have directional characteristics; ensure correct installation orientation.
- Pay attention to the connection polarity between sensor terminals and external components (except for FUS-40E and FUS-300A-PB).
- Impacts or vibrations may cause noise—use rubber or foam material for cushioning.
- Insulation resistance may drop over time; avoid prolonged DC voltage application.
- Do not use the sensor underwater.
- Product specifications and appearance are subject to change without notice.
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