For a low resolution (8x8) option, there's Panasonic's GridEYE. It's good enough for basic area thermal imaging, though not nearly as useful as a high res senso

For a low resolution (8x8) option, there's Panasonic's GridEYE. It's good enough for basic area thermal imaging, though not nearly as useful as a high res sensor. It is only £30 or so though. Depending on the object temperature, you can also use Silicon or Calcium Fluoride which will work up to around 8um. Humans emit at around 12um though. CaF2 has the advantage that it'll also pass NIR/visible/UV light down to 180 nm.