Category Archives: Sensors

Alarm Sensors

Here’s a quick run down on what 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 my … 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

One of the most basic, yet overlooked items on an alarm is the bonnet switch. It’s job is to protect the engine bay which once breached often¬†means the battery can be disconnected or the siren can be attacked and silenced. … 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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Posted in Alarm Accessories, Sensors, Toyota | 2 Comments

Cobra 5462 Microwave Sensor

A 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 as it is 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 then a glorified microphone that detects high pitch … Continue reading

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Ultrasonic Sensors

Ultrasonics are one of the most effective sensors for protecting the internal space in a vehicle and are much more reliable then a glass break sensor. There are normally two sensors which are typically installed at the top of the … Continue reading

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PIR Sensors

PIR sensors (passive infared) detect infared light (heat energy) which radiates from objects in it’s field of vision such as a human body. This makes them great for protecting Ute canopies. Installation methods There are two ways to connect a … Continue reading

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Autowatch Wireless Reed Switch

There are some vehicle where running cables can be a real pain and a major time consuming event. Motor homes and boats instantly spring to mind, I’ve certainly uttered some expletives in the past when I’ve pondered just how the … Continue reading

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Posted in Alarm Accessories, Autowatch, Sensors, Wireless Sensors | 4 Comments

Cobra Tilt Sensor

Think how much it would suck to wake up one morning only to find that your wheels had been stolen from your car! Not much fun hey? So how to protect your wheels? Most alarm systems do not protect against … Continue reading

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Posted in Alarm Accessories, Cobra, Obsessive Go-Kart, Sensors | 8 Comments