The Liquid 1 Level Sensor is an aid for people with vision impairment to fill cups and glasses with one level of liquid such as for non mixed drinks.
	
	
	
The unit simply hangs over the side of a cup or glass with the metal prongs on the inside of the container.
	
	
	
The unit gives a continuous tone when the liquid reached approximately 15 mm from the top of the container.
	
	
	
A magnet on the rear of the unit allows for easy storage and location onto a metal object such as a fridge.
	
	
	
Easy battery replacement no screws to undo as the case splits open to expose battery compartment.