A<unk>  is an electronic device which is used to alert children and adults that they are in the process of urinating while asleep (this is known as nocturnal enuresis).<unk> s are currently the only curative approach available for people suffering from<unk>  issues.<unk> s come in several different styles: wearable<unk> s, wireless<unk> s, and pad-type<unk> s. While there is some variation in the styles of the<unk> s, they all function similarly; each<unk>  has a moisture sensor component and an<unk>  component. When the child first begins to urinate the sensor will detect the moisture and sound the<unk> .<unk> s are a treatment tool designed to teach people to respond to a full bladder by waking and using the toilet. The<unk>  alerts the brain to the fact that urination has begun and that the person should stop, wake, and finish urinating in the toilet.  This alert helps begin to condition the brain to register the bladder’s need to urinate.  Unlike a standard<unk>  clock that is set to arbitrarily awaken a person to use the toilet while sleeping, a<unk>  reacts to the person’s biological need to urinate. This conditioning method can only work with a<unk> , which senses urine and sounds. The time and amount a person urinates each night changes, so waking someone at a pre-determined time is ineffective.<unk> s are a mainstay in enuresis treatment and an easy first step to a solution.
A wearable<unk>  is a design in which the child wears the moisture sensor in or on their underwear or pajamas. This type of sensor will detect moisture almost immediately. The sensor is attached to the<unk>  unit with a cord that can be worn under the shirt.
A wireless<unk>  is one in which the sensor and the<unk>  unit communicate by a means other than a wire. The transmitter, which senses the moisture, is directly attached to the child's underwear. The signal is transmitted wirelessly to a unit that is across the room from the child or an<unk>  unit in the child's room. Once the<unk>  unit is activated, it is necessary to get out of bed to turn it off.
Bell-and pad<unk> s do not attach to the child in any way. The moisture sensor is in the form of a pad or mat that the child sleeps on top of. The pad detects moisture after urine has leaked onto it. The<unk>  unit is connected with a cord and usually sits on the bedside stand. This<unk>  requires a larger amount of urine before the sensor can detect moisture. The person must be on the pad for it to sense moisture.
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