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Views: 219 Author: Site Editor Publish Time: 2020-03-24 Origin: Site
Due to the influence of COVID-19, "body temperature measurement" is already a daily need of people. Therefore, the forehead thermometer is another popular product after masks, alcohol, disinfection water and other epidemic prevention materials.
The circuit of the forehead gun is relatively simple. It is mainly an MCU, an EEPROM, and a buzzer. There are several buttons on the outside, an infrared temperature sensor, a small LCD screen or a digital tube, and a battery.
Manorshi recently received many enquiries from customers asking about buzzers for non touch thermometer. Here, we recommend the buzzers for thermometers.
No. | Item | Unit | Specifications |
1-1 | Rated Voltage | VDC | 5 |
1-2 | Operating Voltage | VDC | 4-7 |
1-3 | ＊Rated Current（Max） | mA | 30 |
1-4 | ＊Min Sound Output at 10cm | dB | 85 |
1-5 | ＊Resonant Frequency | Hz | 2700±100 |
1-6 | Operating Temperature | ℃ | -40~+85 |
1-7 | Storage Temperature | ℃ | -40~+85 |
1-8 | Weight | g | 1.5 |
1-9 | Housing Material | LCP | |
1-10 | Lead Pin Material | Red Copper（DSn） | |
The buzzer in the thermometer mainly plays the role of beep. Because the thermometer is relatively small, the buzzer we use must also be smaller. The no contact thermometer uses a battery, and the required working voltage is relatively low, generally 3V. The sound pressure is generally between 75dB and 85dB.
In summary, Manorshi recommends that you choose an SMD buzzer for the contactless thermometer, such as SM09PT02A,SM08ET03A, SM11PT02A, SM05ET03A and etc.
There are different types of buzzers. SMD is just one of many. When selecting this buzzer, you need to be familiar with its functions.
When choosing the SMD buzzer, you should also follow the operating principle to make a decision. Here you need to weigh some factors, such as the indicator and its driver circuit (usually built into the device). The device should be simple enough to implement a conventional plug and play mechanism. The SMD buzzer has an indicator, which is provided with the built-in circuit in the device. This feature enhances the flexibility of the buzzer. Although you must enter a DC voltage, because the frequency is internally installed, you can also get a pulsed audio signal. Transducers help you achieve great flexibility, including the use of specific frequencies and waveforms to produce a variety of sounds.
In addition to the SMD buzzer, we also recommend a smaller 3V or 5V magnetic buzzer, like our MSES09D. This product does not require a vibration source, it can be used after being powered on, which is more convenient.
Of course, if you have other opinions about the buzzer used in the laser fieberthermometer, Manorshi welcomes your inquiry and discussion.
