iRayUSA Bolt TH50C V2 vs Pulsar Thermion 2 LRF XL50
The Bolt TH50C V2 runs a 640×512 core at 12 µm behind a 50 mm lens; the Thermion 2 LRF XL50 runs 1024×768 at 12 µm behind 50 mm. The Thermion 2 LRF XL50 has 2.4× the pixels. On the Johnson yardstick they detect a person at 1,042 m and 1,042 m and recognize one at 260 m and 260 m; the boxes say 2,190 m and 2,300 m. The Bolt TH50C V2 is lighter by 5.6 oz. Approximate prices are ~$5,499 and ~$5,500.
Estimated range, standing human, clear air
IdentifyRecognizeDetectBox claim
iRayUSA Bolt TH50C V2640×512 · 12 µm · 50 mm
160 m identify260 m recognize1,042 m detectbox says 2,190 m (unspecified)
160 m identify260 m recognize1,042 m detectbox says 2,300 m (unspecified)
501002005001k2k5k m
Estimated from pixel pitch and lens focal length using the Johnson criteria (2, 8 and 13 pixels across a 0.5 m human critical dimension), clear air, 50 % probability. A model of the optics, not a measurement — real range depends on temperature contrast, humidity and the animal.