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Magnetic switch interlock with magnetic keys
- We have received various enquires regarding an interlock for preventing machine operation without the presence of a magnetic key.
- So far we have developed 2 types of magnetic interlock: one with a magnetic key with a tag for identifying the operator, and one with a chord attached to the operator which pulls the magnetic key out of the interlock when the operator moves away.
- The magnetic interlock design is flexible and the system can be used wherever an extra input is required in a control system.
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Tractor front wheel drive sensor
- A well known manufacturer of agricultural machinery required a robust sensor for switching off the front wheel drive of a tractor when the wheels turned beyond a certain angle.
- Our magnetic switch design went through weeks of severe field testing before being accepted.
- The system involves a stainless steel assembly mounted to the steering tubes and a magnetic sensing system which is protected inside the chasis.
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Level sensor with proportional output
- A proportional output was required from a magnetic float in a marine application.
- We developed an array of reed switches which, in combination with several resistors, gave a 20 step output for a pump’s control system.
- The unit is manufactured from plastics and copper-nickel to reduce corrosion.
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Short magnetic switch with right angle cable exit
- A company required a magnetic switch for a tie-rod pneumatic cylinder which should be less than 22m long, have a right angled cable exit and an NPN output.
- By machining and reassembling parts of our existing magnetic switch housings we were able to supply a batch of 50 magnetic switches to the above specification within a few days. The switches were supplied with our 2 wire sensor so they could be used for any system, not just NPN.
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Water inlet blockage detectors for boats
- The cooling water inlet through a boat’s hull can becomes blocked or the seacock can be accidentally left closed, leading to overheating and possibly the destruction of the engine.
- We developed a corrosion resistant water inlet sensor using a reed switch sensor. It detects the ‘negative pressure’ that occurs in the water cooling system when there is a blockage.
- The sensor gives an output at a pre-set negative pressure to signal a blockage which can then be used to sound an alarm and alert the operator.
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Latching changeover switch for detecting a passing elevator cabin
- A replacement was required for a specialised latching changeover magnetic switch which was originally purchased from a Spanish company and is no longer available.
- We were sent an old magnetic switch which was borrowed from an elevator unit so we could determine the operating characteristics. After a few tests on the old switch we were able to supply a replacement which was much neater and easier to fit than the original.
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Contactless angle sensor for vehicle handbrake system
- We developed a contactless angle sensor with a variable output which combined with the non-linear movement of the handbrake to give a linear electronic output.
- By using an electronic magnetic sensor and powerful magnets we created a unit with no moving electrical parts thus eliminating wear.
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