I already own a Heimann LHI958, and am not sure if it is feasible to measure temperature over a distance of atleast 2 feet. I need suggestions on which sensor should i use for the task mentioned.
Your help would be appreciated
To get a suggestion you should specify what you need.
I cannot find a datasheet for the sensor you already own. The data I found show a very large field of view so getting a temperature in 60cm distance might be difficult but that depends on the target application.
So either post a specification of your needs or describe the intended usage in great detail.
Please specify more what you need to do. There are hundreds of thermal sensors/cameras.
I.e. Those sensors can go up to 13m but not sure if it fits your accuracy.