It depends on how accurate you want to be with your temps... this is one of the best in the IR industry (medical grade), but at a cost. It is a well built piece of gear (alloy construction)- http://www.amazon.com/Exergen-Precis...emperature+gun

I have used these in a pinch, are not quite as accurate, but well known in the industry (this is the style you see on most suppliers sites- cheaper plastic housing)- http://www.amazon.com/Raytek-MT4-Non.../dp/B0002198GY

I use one of these scales, but mine is 0-11#. It measures to the gram very nicely and has a good sized platform- http://www.amazon.com/Salter-Breckne...recknell+scale