| Air Ultrasonic Ceramic Transducers | 400ET/R180 |
| Acoustic Performance |
| Impedance/Phase Angle vs. Frequency: Tested under 1Vrms Oscillation Level | |||
| 400ER180 Impedance |  |
400ER180 Phase Angle |  |
| 400ET180 Impedance |  |
400ET180 Phase Angle |  |
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| Sensitivity/Sound Pressure Level: Tested under 10Vrms @30cm | |||
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| Beam Angle: Tested at 40.0KHz | |||
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| Sensitivity Variation vs. Loaded Resistor - 400ER180 Receiver | |||
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| Center Frequency Shift vs. Loaded Resistor - 400ER180 Receiver | |||
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| SPL Variation vs. Driving Voltage - 400ET180 Transmitter | |||
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| Center Frequency Shift vs. Driving Voltage - 400ET180 Transmitter | |||
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