is there a sensor that can measure/dtects nturients in the water??im planning to make hydrocultured plant system

 

First, It would HELP! us if you gave a bit of information in the label.

second, I don't think there are any sensors that can tell which nutrient is available, but there are ways to measure conductivity of the solution to give you a hint about the total content of dissolved nutrients. From that, you could make your own chart telling the range of total dissolved nutrients by measuring solutions that you make just for the purpose of measuring them.

 

Yes ,as allready suggested. The conductivity of water will vary depending on the nutrients in a given amount of water. Experiments measuring this can be achived with
two electrodes at a given spacing and contact area, using an ohmeter.

 

http://www.lakescientist.com/learn-about-lakes/lakesensors/chemical-sensors.html#nutrients

(some basic information)

maybe you should first decide what exactly you want to detect and then investigate if there is a chemical sensor for it

 

Their are individual probes for many dissolved minerals (H+, Ca++, Na+, etc.) but anything other than pH can be a challenge to keep calibrated and reliable. If you're adding nutrients as a cocktail, it'd be easier to just measure conductivity and assume it's the cocktail. That won't be right, but probably close enough. If not, you'll need wet methods for the major components, ie. nitrogen, phosphorous and potassium.

 

google TDS meter..sold by all hydroponic stores