MassaSonic - Model TR-89B Series -Transducers

TR-89B Transducers consist of a one piece housing with an 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.

These transducers can be manufactured under special order to resonate at any specified frequency between 23kHz and 40kHz. Massa stocks two standard versions. The TR-89B Type 23 provides peak untuned receiving response at 23kHz +/- 2kHz, and the TR-89B Type 40 provides peak untuned receiving response at 40kHz +/- 2kHz. Beam patterns of the transducers change at different frequencies, and a greater detection range is obtained with lower frequency transducers due to the attenuation characteristics of sound in air. Thus, the TR-89B Family offers the user a choice of transducers that have characteristics that will meet most requirements. Special frequencies, matched transmitting and receiving pairs, and other custom features are available on special order (consult factory). There are several million TR-89B Transducers in use in many different 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. Massa has over 70 years of specialized experience in this field.

• Low Cost
• Long Sensing Range
• Rugged Packaging
• Moisture-Proof
• High Sensitivity

• Proximity Detection
• Solid Level Measurement
• Liquid Level Control
• Animal Deterrent
• Intrusion Alarms
• Remote Controls
• Energy Managing Systems