Anyone working in security uses thermal imaging cameras. Almost all home and office security systems use thermal imaging cameras or night vision equipment and so do the security officers outside buildings. People on night duty often have night vision equipment, police officers use night vision equipment and firefighters use night vision equipment. Night vision equipment is also used for leisure activities such as night birding, night safaris and night hunting. Night vision equipment can be bought directly from manufacturers or from stores that specialise in night vision brands. You might want to visit one of these stores as they have a good variety of equipment and can talk you through what each one does. You will also always find a night vision camera, or pair of binoculars, or similar, in your price range.
Handheld or mounted night vision equipment
Some night vision equipment is handheld, perhaps a pair of nighttime vision binoculars or a thermal camera, but a lot of night vision equipment can be mounted, such as for a security system. Some night vision equipment comes or is easier to use with a tripod and so you can buy the tripod at the same time, especially if you want to use the equipment to its optimal capacity.
We would suggest you buy from a night vision specialist who has been in the business for a long time, whose staff understand all the different equipment and who can listen to you, assess your needs and offer you the most appropriate piece of equipment. The staff will guide you, especially if you are unsure about what you need. And most people are unsure; they just know they need night vision equipment but they are not sure what. You can get thermal imaging cameras made by various brands at really good prices.