I am looking for support . My son is building a project to detect benzene gas using a sensor and integrating it with a Raspberry pi2. He has located a HCHO sensor from a website which markets a product called Grove + which claims to be the interface between Raspberry pi and world of sensors. Please check this weblink http://www.seeedstudio.com/depot/GrovePi-p-2241.html
He is trying to buy a HCHO sensor as well from this website .http://www.seeedstudio.com/depot/grove-hcho-sensor-p-1593.html .
However, I am not sure whether the grove pi and seeedstudio is trustworthy and whether I could proceed to buy this product from China or is there any local UK product or alternative way which can meet the needs of my sons project.
Thanks for your help