Description 

E-173H 

The Massa Model E-173H is a new high efficiency audio frequency transducer which, when used with the supplied folded horn and the customer's own electronics, offers the O.E.M. a low cost, very high intensity, multi-tone audible alarm generator. The unique folded horn, which is necessary for high-efficiency operation of the transducer, may be purchased with the transducer, or a portion of the horn design can be molded into the O.E.M.'s product such as into the front panel of a smoke detector or burglar alarm. The E-173H transducer, when driven with 70 volts RMS delivers a sound pressure of greater than 125 dB vs .0002 ubar at 1 foot in the frequency range 2.5 to 3.5 kHz.

Although primarily designed as a very efficient transmitting transducer, the E-173H can also be used as a sensitive receiver. It is ideally suited for applications requiring a combination listening device and an audible alarm generator in a compact package such as an audible alarm repeater for recognizing a weak signal from a smoke detector and repeating the signal as an intense alarm. It can also be used as an efficient high-intensity intrusion alarm signal. Consult Factory for special applications and for additional specifications.

E-194

The Model E- 194 is a high-intensity, low-cost alarm comprising the E-173H transducer and horn assembly plus all the driving electronics contained in a small attractive package. The small, light-weight unit is designed for O.E.M.'s or other users who have need for a self-contained, high-intensity alarm which can be operated from a 9-Volt battery. The E-194 delivers a sound level of 123 dB vs .0002 ubar at 1 foot over the frequency range of 2.5 to 3.5 kHz when connected to a 9-volt battery, with a current drain of less than 150 mA. The acoustic power output is 20 dB greater than present UL specification requirements for smoke alarms and intrusion alarms

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. 

• Burglar Alarms

• Warning Devices

• Smoke Detectors

• Alarm Signal Repeaters

• General Purpose Noisemakers

• Megaphone (electronic)

• High Efficiency

• High Intensity: Greater than 125 dB (20 dB greater than UL requirements for Smoke Detectors & Intrusion Alarms.)

• Low Cost

• Light Weight

• Complete with Driving Electronics (E-194)

• Patented Transducer and Horn Design

• Low Power Drain

• Dual Function-Receiving and Transmitting Capabilities