i need a sweet sensor for my project please tell source or shop to purchase the sweet sensor. please guide.
Please tell us what you want to do, or describe what a sweet sensor is!
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If by "sweet" you mean a sensor that measures the sugar content of a liquid, then no, no such sensor exists. For brewing (wine/beer) a hydrometer is generally used, mostly of the floating type. I can imagine there are types available with electronic readout as well. But these measure the sugar content of a fairly well-known liquid and other constituents can bias the results.
If by "sweet" you mean the taste, then you can stop looking because no such sensors exist to the best of my knowledge.
basically, i am developing a smart wearable diabetic prototype which comprises of Arduino Nano, Bluetooth module, power supply and diabetic sensor. but diabetic sensor is not available what should i do.
Basically, i am developing a smart wearable diabetic prototype which will be wear to measure sweet of body and display result which comprises of Arduino Nano, Bluetooth module, power supply and diabetic sensor. but diabetic sensor is not available what should i do.
This is a medical device and as such subject to strict regulations in many ways. Your project management and component choice are not compatible with these kinds of requirements. If you want to make this work, you'll have to enlist the help of people/companies with ample experience in this area. I cannot offer any more help and actually refuse to do so, because making a medical device is simply not a hobby project. I would consider it unethical to help you proceed in the direction you're heading.
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I guess if this is just a prototype then no harm will be done, but in principle I totally agree with @anon35827816 - the implications if someone uses your device and becomes ill or dies because there's a bug in your code are horrifying.
Errmm.... give up? If no such sensor is available, then what you want to achieve cannot be done.
If I had enough medical knowledge I might be able to discuss alternative ways of measuring a person's blood sugar level, but I'm afraid it's way outside my areas of expertise. I think you cannot do this project on your own - you need to get in touch with a university research department to find out what is the current state of the art in sensing blood sugar level.
There are commercial products that fulfill this need, but the sensor technology is proprietary and indeed it's the core of these companies' value proposition and intellectual property. I don't think any of these sensors are available off the shelf; it is conceivable a strategic alliance could be entered with one of such companies, but that's a totally different endeavor than hooking up a sensor to an Arduino.
Disclaimer: I happen to have been in touch with a couple of medical device manufacturers lately for work and have quite a bit of experience on corporate innovation roadmaps etc and based on that experience, I can only emphasize my earlier warnings. This is way beyond the hobby sphere that we're mostly in on this forum.
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Hi, @ghanghro
Welcome to the forum.
How do you envision a "blood sugar" sensor would work?
How will you get blood samples to accurately measure the mmoL/L level?
Can you please tell us your electronics, programming, arduino, hardware experience?
Tom... 
I'll second that.
It's basically self-explanatory. 
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