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    Door Window NC Contact Security Safety Alarm Magnetic Sensor Reed Switch Sets

    Door Window NC Contact Security Safety Alarm Magnetic Sensor Reed Switch Sets Door Window NC Contact Security Safety Alarm Magnetic Sensor Reed Switch Sets Door Window NC Contact Security Safety Alarm Magnetic Sensor Reed Switch Sets
    Descriptions:
    • Switch Type: NC(normal closed type), the circuit is closed normally, and, that if a magnet not near it, the circuit open.
    • The Reed Switch is an electrical switch operated by an applied magnetic field. It was invented at Bell Telephone Laboratories in 1936 by W. B. Ellwood. It consists of a pair of contacts on ferrous metal reeds in a hermetically sealed glass envelope. There are two types of reed switches: normally open reed switches and normally closed reed switches. The metal reeds on a normally open switch stay open when there is no magnet near the switch. In the presence of a magnetic field, the contacts of a normally-open reed switch will close. A normally-closed reed switch is closed when it is not near a magnet; as a magnet is brought close to it, a normally-closed switch will open.

    Hot Item
    • We accept eBay payment.
    • Please do not email us to ask for other payment option.
    • We appreciate prompt payment and look forward to your business in the future. Unpaid item will be filed without receiving payment in 7 days from listing ended.
    • Usually we ship your order out within 24 hours in business day.
    • For shipping and handling charges (S&H) for specific item, please refer to the item listing page for more details.
    • Please make sure your shipping address is correct. We are not responsible for any loss in transit if a wrong address is provided.
    • Returns for exchange are permitted and must be initiated by the buyer within 30 days upon receipt.
    • If you would like to return your product(s) for repair / replacement / refund, please kindly contact our customer service representatives via email for an authorized RMA number. Your returned product(s) will not be processed without a completed RMA.
    • We are continually expanding our product selection to better serve your need.
    • We look forward to providing the best sevice to you - our dear customers, so take a look around our store and find the product that you want. You can put your trust in us!
    • If you need any help or have any suggestions, please don't hesititate to contact us anytime , we will reply you within 24 hours and try the best to help you.

      Door Window NC Contact Security Safety Alarm Magnetic Sensor Reed Switch Sets

      Door Window NC Contact Security Safety Alarm Magnetic Sensor Reed Switch Sets
      Descriptions:
      • Switch Type: NC(normal closed type), the circuit is closed normally, and, that if a magnet not near it, the circuit open.
      • The Reed Switch is an electrical switch operated by an applied magnetic field. It was invented at Bell Telephone Laboratories in 1936 by W. B. Ellwood. It consists of a pair of contacts on ferrous metal reeds in a hermetically sealed glass envelope. There are two types of reed switches: normally open reed switches and normally closed reed switches. The metal reeds on a normally open switch stay open when there is no magnet near the switch. In the presence of a magnetic field, the contacts of a normally-open reed switch will close. A normally-closed reed switch is closed when it is not near a magnet; as a magnet is brought close to it, a normally-closed switch will open.

      Hot Item
      • We accept eBay payment.
      • Please do not email us to ask for other payment option.
      • We appreciate prompt payment and look forward to your business in the future. Unpaid item will be filed without receiving payment in 7 days from listing ended.
      • Usually we ship your order out within 24 hours in business day.
      • For shipping and handling charges (S&H) for specific item, please refer to the item listing page for more details.
      • Please make sure your shipping address is correct. We are not responsible for any loss in transit if a wrong address is provided.
      • Returns for exchange are permitted and must be initiated by the buyer within 30 days upon receipt.
      • If you would like to return your product(s) for repair / replacement / refund, please kindly contact our customer service representatives via email for an authorized RMA number. Your returned product(s) will not be processed without a completed RMA.
      • We are continually expanding our product selection to better serve your need.
      • We look forward to providing the best sevice to you - our dear customers, so take a look around our store and find the product that you want. You can put your trust in us!
      • If you need any help or have any suggestions, please don't hesititate to contact us anytime , we will reply you within 24 hours and try the best to help you.