This is a question that we are often asked and whether your Monitor, Sensor Pad is new, been used for a more than one baby, wired or wireless the movement function is still the same.
The Angelcare Sensor Pad can be compared to a microphone that converts tiny vibrations in the air (sound) into a signal.
To explain, Angelcare Movement Monitors monitor your baby’s movements/vibrations on the full surface of their mattress - whether the rise & fall of the chest area or even the smallest, subtle movements that you cannot see under their clothing, blanket.
The Angelcare Sensor Pad converts even the smallest of your baby's movements over the surface of your baby's mattress into a tiny signal.
The Sensor Pad itself has a large collecting surface (the top) which transfers and concentrates movement into the centre of the pad. These movements do not have to be made directly over the top of the pad as, baby`s mattress itself will transfer the vibration forces.
Therefore, baby does not have to be lying above the Sensor Pad in order to detect their movement. The Angelcare Sensor Pad can detect baby's movements on the full surface of their mattress, from corner to corner - wherever baby is lying and can be adjusted to suit (only adjust if required).
These small movements become concentrated in the centre of the pad where they are detected by a Piezo Crystal. This crystal has the property of producing a small signal in proportion to the change in force applied to it.
The signal from the Sensor Pad goes to the Nursery/Camera Unit where it is magnified hundreds of times by an amplifier.
When there is NO movement detected on the surface of baby's mattress there is no change in force on the crystal hence, no signal is produced and after 20 seconds the monitor will alarm to alert you and baby
When movement IS detected on the surface of baby's mattress, a signal is produced in sympathy with these movements and the monitor will not alarm as no alert is required
Importantly, whilst the Angelcare Sensor Pad can detect movement it cannot differentiate between baby`s, yours or another form of movement in, close to or attached to their cot and may not alarm if required.
Therefore, when monitoring baby’s movements you should not use a cot mobile, any toy that plays music, emits white noise etc in or attached to the cot, a fan directed at/near the cot – these all emit a form of movement, albeit very small on the surface of the mattress or the cot itself.
If you are using a bedside crib you are unable to use the Sensor Pad when it is attached/touching your bed. When any bedside crib is attached/next to/touching your bed the Sensor Pad cannot be used as it is sensitive enough to detect movements on the surface of your mattress.
To establish whether your Sensor Pad is at the correct sensitivity level for your baby's mattress we would advise to carry out the very simple “Four Corner Test” so: search "Four Corner Test" in our Help Centre and select your model.
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