High Voltage Reed Switch
Magnetic Switch, some call Door Contact. It is a small accessory specialized in supervising the status of doors and windows. It can be divided into two parts: the first part which has a lead wire to be installed in the fixed door frame and the lead wire connects to...
High Voltage Reed Switch
Magnetic Switch, some call Door Contact. It is a small accessory specialized in supervising the status of doors and windows. It can be divided into two parts: the first part which has a lead wire to be installed in the fixed door frame and the lead wire connects to controller: the second part is a magnetic substance whose polarity is opposite to the first part, it is installed in the active door leaf to align with the first part.
REED RELAY, OIL LEVEL SENSOR, MAGNETIC SENSOR, REED PILE
Oil level sensor
The reed switch is currently an excellent substitute for various fuel level sensors for vehicle tanks. At present, among the existing technologies, oil (liquid) sensors are divided into two categories: One is the use of a sliding potentiometer as the basic detection element. The potentiometer is driven by the float, and then the resistance is measured with an ohmmeter to achieve the purpose of displaying the oil level. However, when the grease covers the potentiometer, the resistance value will change, causing too much error, and even can not be used. The fuel tank sensor becomes a short-life consumable.
The other is the use of inductors as the basic detection element. It uses a float to drive the inductor coil, change the oscillation frequency of the shock circuit, and then measure the frequency by the frequency meter to determine the oil (liquid) position. However, its structure is complicated, the debugging is troublesome, the cost is high, and the price is expensive and cannot be widely used. Therefore, the use of dry-reed pipes with long life, safe and reliable, non-sparking and other characteristics of the production of liquid level sensors, is now a variety of vehicle fuel tank level sensor an excellent alternative.
In addition to reed relays and sensors, reed switches (reed switches) are widely used in circuit control, especially in the communications field. Reed switch magnet drive commonly used mechanical system, proximity sensor. Examples are door and window sensors in burglar alarm systems and tamper-proof methods.
The laptop uses a reed switch to put the laptop in sleep/hibernation mode when the lid is closed. The speed sensor of the bicycle wheel and the car gear uses a reed switch to simply drive the magnet on each wheel through the sensor. Previously used for reed switches in computer terminals, where each key has a magnet, the keypad of a reed switch actuated by pressing a key; a cheaper switch is being used. Electric and electronic pedal keyboards are used by organ players, who often use reed switches to contact the glass enclosure to protect it from dirt, dust, and other particles. They may also be used to control diving equipment such as flashlights or cameras, which must be sealed to maintain pressurized water.
Reed switches can also be used for computer cooling fans and disk drives. Due to the availability of cheap Hall-effect sensors, they replace reed switches and give longer life. In the recent period, solid state Hall effect sensors have replaced the reed switches.