Category Archives: Sensors

Toyota Ultrasonic Switch

Back in 2016, I was given the heads up that the Cobra AK4218 Toyota upgrade alarm was going to have one final production run. I purchased a bulk load of them which has got me through the past couple of … Continue reading

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Shock Sensors and False Alarms

Shock Sensors are beyond doubt the main culprit when it comes to false alarms. How many times have you got annoyed at a car alarm going off for no obvious reason? More to the point, have you ever gone out … Continue reading

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Car Door Switches

Car door switches are one of the most basic, yet often overlooked items on any car alarm system. They detected if the door is open or shut so are the first layer of protection for any security system. Even if … Continue reading

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What is van door peeling and how do you protect against it?

Van Door Peeling, or “Peel and Steal” is a big issue in the UK right now. It’s a very destructive way to break into a van without triggering the factory alarm (if there even is one). Peeling is the simple act … Continue reading

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Car Alarm Sensors

Here’s a quick rundown on what car alarm sensors are available and what they actually detect. Click on each link for a more detailed explanation… Door and Boot Switches Most vehicles already have these fitted as standard equipment. Part of … Continue reading

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AK4615 Disabling Ultrasonic Sensors

The following instruction explain how to disable the ultrasonic sensors on a Cobra AK4615 and AK4625 Turn the ignition off Within 5 seconds press the emergency panel push button and keep it pressed until the LED flashes X times. It … Continue reading

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Bonnet Switches

Car Alarm Bonnet Switch One of the most basic, yet overlooked items on any security system is the car alarm bonnet switch. It’s job is to protect the engine bay which once breached often means the battery can be disconnected or … Continue reading

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Reed Switches

A reed switch is a none contact electronic switch that opens and closes as a magnet moves in and out of proximity. They are great for protecting opening zones where a conventional plunger switch would not be practical. Common uses … Continue reading

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Cobra 5462 Microwave Sensor

An Alarm microwave sensor (or super high-frequency volumetric sensor as Cobra call it) is ideal for soft top convertibles or other areas where ultrasonic sensors would not be suitable. Microwave Sensors are not sensitive to air movement.  The sensor operation … Continue reading

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Glass Break Sensors

Glass break sensors often come as standard with car alarms in New Zealand. As the name suggests, they are designed to detect if a window has been smashed. Most are little more than a glorified microphone that detects high pitch … Continue reading

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