PK-21A31PQ

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PK-21A31PQ is a type of alarms, buzzers, and sirens which is widely used in industrial, medical and security systems. It is dual channel detecting device with a current consumption of less than 160 mA at 3.3V. The device has two parts: a high impedance analog input board and a digital microcontroller board.

The analog input board of the device has two sensors. One is a thermistor-based temperature sensor, and the other is a photo-transistor light copy sensor. The thermistor-based temperature sensor is used to detect the temperature. It converts the temperature into an electrical signal before feeding it to the microcontroller board. On the other hand, a photo-transistor light copy sensor is used to detect light intensity. It converts the light intensity into an electrical signal before feeding it to the microcontroller board.

The digital microcontroller board contains a microcontroller which is used to process the data received from the analog input board. It can send signals to other devices, such as an alarm system, through digital output lines. It also contains several programmable triggering and outputting parameters such as threshold values and response time. The microcontroller board is programmable so that it can be tailored to meet the needs of the application.

The PK-21A31PQ is primarily used in industrial, medical and security applications. It is used to detect temperature, light intensity, and other parameters as specified by the application. The device can be programmed to detect a specific threshold value and activate an alarm or other system when that value is reached. It is also used to detect changes in temperature or light level and trigger a response from the system. The device can also be used to detect high or low temperature, and activate an alarm or respond to a pre-defined response system.

In a medical application, the device can be used to detect changes in body temperature or other biological parameters. It can also be used to detect changes in noise level and activate a response system. In a security application, the device can be used to detect changes in light level and sound levels. It can also be used to detect unauthorized access or movement.

The PK-21A31PQ is an important device for industrial, medical and security applications. Its dual input board and programmable microcontroller board make it a versatile and reliable detection device. It is relatively easy to install and use, making it an ideal choice for many applications.

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