Description
TR-89/B
The TR-89/B Series Transducers are rugged electroacoustic devices designed for the efficient generation of ultrasonic energy in air. They are ideally suited for a wide variety of low power, general purpose applications such as ultrasonic intrusion alarms, proximity detection devices, remote control devices, and energy management systems.
The Transducers consist of a one piece housing with integral diaphragm. This provides a moisture-proof unit, suitable for both indoor and outdoor use when mounted so that the rear terminals are protected from exposure to the direct outdoor environment. The units operate at resonance on the first harmonic overtone. This affords greater efficiency (higher transmitting and receiving response) than an equivalent size device operating at its fundamental.
The standard TR-89/B, Type 23, provides peak untuned receiving response at 23 kHz +/- 2 kHz. The standard TR-89/B, Type 31 and Type 40, provide peak untuned receiving response at 31 and 40 kHz +/- 2 kHz respectively. The units provide different directional characteristics at the various frequencies and provide greater range at the lower frequencies due to the attenuation characteristics of sound in air. Thus, the TR-89/B family offers the user a choice of units whose characteristics will match any requirement. Special frequencies, matched transmitting and receiving pairs, and other custom features are available on special order (consult factory). There are several million TR-89/B transducers in use in a variety of applications throughout the world.
Massa Products Corporation is a leading designer and manufacturer of a wide variety of electroacoustic transducers and systems for use in air and under water, with over 50 years of specialized experience in this field.
Applications
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Robotics
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Liquid Level Measurement
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Intrusion Alarms
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Remote Controls
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Proximity Detection
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Solid Level Measuring
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Energy Management Systems
Features
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Low Cost
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Rugged Packaging
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Moisture-Proof
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High Sensitivity
