Electronic Alarm Magnetic Transducer Sound Output 86dB for Wireless
- Place of Origin: Jiangsu, China (Mainland)
- Brand Name: MANORSHI
- Model Number: MSET09B
- Type: buzzer
- Min. Sound: 86db,87db,88db
- Rated Voltage: 1.5v,3v,5v
- Resonant Frequency: 2730hz
- Coil Impedance:15ohms,35ohms,80ohms
- Dimension: 9mm
- Color: black
Min. Sound Output at 10cm (dB)
Rated Voltage (Vp-p)
Operating Voltage (Vp-p)
Resonant Frequency (Hz)
Max. Current Consumption (mA)
Coil Resistance (ohms)
Coil Impedance (ohms)
Operating Temperature (C)
Storage Temperature (C)
Passive buzzer have not internal drive circuit inside, We used to
name them as acoustic. Passive work buzzer square wave signal.
Passive buzzer can't make a sound by direct current.
Electromagnetic Acoustic Transducer (EMAT) is a transducer for
non-contact sound generation and reception using electromagnetic
mechanisms. EMAT is an ultrasonic nondestructive testing method
which doesn’t require contact or couplant, because the sound is
directly generated within the material adjacent to the transducer.
Due to this couplant-free feature, EMAT is particularly useful for
automated inspection, and hot, cold, clean, or dry environments. As
an emerging ultrasonic testing (UT) technique, EMAT can be used for
thickness measurement, flaw detection, and material property
characterization. After decades of research and development, EMAT
has found its applications in many industries such as primary metal
manufacturing and processing, automotive, railroad, pipeline,
boiler and pressure vessel industries.
The disadvantages of EMAT:
1. Low transduction efficiency. EMAT transducers typically produce
raw signal of lower power than piezoelectric transducers. As a
result, more sophisticated signal processing techniques are needed
to isolate signal from noise.
2.Size constraints. Although there are EMAT transducers as small as
a penny, commonly used transducers are large in size. Low-profile
EMAT problems are still under research and development. Due to the
size constraints, EMAT phased array is also difficult to be made
from very small elements.
3Caution must be taken when handling magnets around steel products.