Are there devices that warn about low blood sugar?

I've been type 1 diabetic for 25 years.

I live alone and am having trouble with sudden lows and bottoming out.

Does anyone know of devices that can warn me?
Update: EDIT: I'm sorry, my question was unclear. I have monitors and use them. I'm looking for something that will warn of a drop in blood sugar. Obviously, if I sense I'm going low I can test, but I'm finding my symptoms are no longer pronounced enough to test before I'm too low. I've seen... show more EDIT: I'm sorry, my question was unclear. I have monitors and use them.

I'm looking for something that will warn of a drop in blood sugar. Obviously, if I sense I'm going low I can test, but I'm finding my symptoms are no longer pronounced enough to test before I'm too low. I've seen the night sweat watch, but haven't read enough reviews to see if I want to buy it. Anyone have experience with these?
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