night time monitors

Hi and welcome to the forum.

I did see them but they seem to only work for 79% of customers and rely on perspiration to activate.

Successful with 79% of our customers. It will not suit everyone all of the time. We do offer a 28 day money back guarantee for the purpose of evaluation. We do not recycle these devices. If you know that proceeding/during a hypo, perspiration levels increase and you become clammy and cold, then the HSA-01 will most likely work very well for you.
http://www.medpage-ltd.com/page67.html

Are you suffering from nighttime hypos?

Plenty of advice from people here if you pose a question.