Reed Switch Datasheet Pdf

The mechanical motion of the reeds is below the fatigue limit of the materials, so the reeds do not break due to fatigue. Read the specifications carefully and use this product. It compares the time between input pulses with an adjustable reference time base. It is possible to eliminate or reduce.

There is not an answer that is both simple and accurate. Other magnetically-activated switching devices have a limited range of output voltages and currents, and generally do not directly control a final device such as a lamp, solenoid, or motor.

We use Cookies to give you best experience on our website. Reed switches were formerly used in the keyboards for computer terminals, where each key had a magnet and a reed switch actuated by depressing the key. Even though an auto switch operates normally, the load.

Slide the reed switch assembly to expose the switch. The reed switch is an economical non-contact switching.

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The thermal coefficient of expansion of the glass material and metal parts must be similar to prevent breaking the glass-to-metal seal. Using the Reed Switch by itself can seem like the simplest approach.

Insert the auto switch into the mounting groove and set it at the auto switch mounting position. The contacts are usually normally open, closing when a magnetic field is present, or they may be normally closed and open when a magnetic field is applied. It is again necessary to connect a contact.

The reed is hermetically sealed and can therefore operate in almost any environment, such as where flammable gas is present or where corrosion would affect open switch contacts. Magnet Sensor Datasheets Complete specifications of all the magnet sensors we produce, usage notes, ordering codes, standard magnets and test coils, and magnet actuation examples. Other Sensor Datasheets Complete specifications of all the thermal reed switches, float switches and level sensors we produce, usage notes and ordering codes. For detailed precautions on every series, cycle of violence pdf refer to main text.

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Speed sensors on bicycle wheels frequently use a reed switch to actuate briefly each time a magnet on the wheel passes the sensor. Please order the auto switch spacer, since it is not included. Another type of reed switch contains one flexible reed that moves between a fixed normally-open contact and a fixed normally-closed contact. Mercury-wetted reed relays are sometimes used, especially in high-speed counting circuits.

The Form A Reed Switch contacts have closed in the presence of a. This avoided the need for any rubbing contact to provide power to the rotor.

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Examples are door and window sensors in burglar alarm systems and tamperproofing methods. The hermetic sealing of a reed switch make them suitable for use in explosive atmospheres where tiny sparks from conventional switches would constitute a hazard. When an auto switch is placed at an intermediate position of.

This article needs additional citations for verification. The reeds are hermetically sealed within a tubular glass envelope.

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Because of this, manufacturers rate life in number of operations rather than hours or years. As the length of the wiring to a load gets longer, the rush. In other projects Wikimedia Commons.

Depending on the electrical load, life can be in the range of thousands of operations or billions of operations. The glass envelope can be damaged if the reed switch is subjected to mechanical stress.

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Use caution to the internal voltage drop of a. Fix it to the detecting position with a set screw by installing a mounting bracket in cylinder tie-rod and letting the bottom surface of a mounting bracket contact the cylinder tube firmly. Hamlin specifies the test coil used in each reed switch data sheet. Please choose the optimum reed switch best-suited to your intended applications from a. It somewhat resembles part of some reed plants.

Maintain a minimum cylinder. Reed Switch modifications can be very dangerous to the Reed Switch if not done properly. In a closed circuit the cable length ft. In its simplest and most common form, it consists of a pair of ferromagnetic flexible metal reeds contacts in a hermetically sealed glass envelope.

The set of stainless steel mounting screws with nuts described below is available and can be used depending on the operating environment. When the magnet is withdrawn the reed blades will open. When the allowable interval is specified. Primarily, this is because the reed lead is large by comparison to the glass seal.

Contact surface wear occurs only when the switch contacts open or close. When doing this, confirm that it is set in the correct mounting orientation, or reattach if necessary. The most common type of reed switch contains a pair of magnetizable, flexible, metal reeds whose end portions are separated by a small gap when the switch is open. If a different coil is used, the readings may be different.

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