flir thermal imaging camera for security

the targer size of human is 1.8*3.0m,the car is 2.3*2.3mthe actual effecting distance would change along with different circumst Compare FLIR SR-Series Camera Models

Model	SR-Series
Camera Platform Type	Fixed
Thermal Camera Specifications
Array Format (NTSC)	160 x 120	320 x 240	640 x 480
Detector Type	Long-Life, Uncooled VOx Microbolometer	Long-Life, Uncooled VOx Microbolometer	Long-Life, Uncooled VOx Microbolometer
Effective Resolution	19,200	76,800	307,200
Pixel Pitch	25 µm	25 µm	17 µm
Field of View	24° × 20° (SR-124; 9 mm)17° × 14° (SR-117; 13 mm)12° × 10° (SR-112; 19 mm)	48° × 39° (SR-348; 9 mm)34° × 28° (SR-334; 13 mm)24° × 19° (SR-324; 19 mm)13° × 10° (SR-313; 35 mm)9° × 7° (SR-309; 50 mm)4.6° × 3.7° (SR-304; 100 mm)	45° × 37° (SR-645; 13 mm)25° × 20° (SR-625; 25 mm)18° × 14° (SR-618; 35 mm)12° × 10° (SR-612; 50 mm)6.2° × 5° (SR-606; 100 mm)
Zoom	2x E-zoom	2x & 4x E-zoom	2x & 4x E-zoom
Spectral Range	7.5 μm to 13.5 μm
Focus Range	Athermalized, Focus-Free
Outputs
Composite Video NTSC or PAL	Standard
Control
Point to Point (stand alone)	Standard
Serial	RS-422/232
Network Enabled	Yes
General
Weight	4.6 lbs / 2.1 kg	4.6 lb / 2.1 kg (all but SR-309 & SR-304)<7 lbs / 2.9 kg (SR-309 & SR-304)	4.6 lb / 2.1 kg (all but SR-612 & SR-606)<7 lbs / 2.9 kg (SR-612 & SR-606)
Dimensions(L, W, H)	10.5" × 5" × 5.7"	10.5" × 5" × 5.7"14.25" x 5" x 5.7" (SR-304)	10.5" × 5" × 5.7"14.25" x 5" x 5.7"(SR-612 & SR-606)
Input Voltage	14-32 VDC or 18-27 VAC
Power Consumption(Consult product manuals for details of power requirements)	24 VAC:Nominal: 5 VAMax: 21 VA24 VDC:Nominal: 3 W Max: 10 W	24 VAC:Nominal: 5 VAMax: 21 VA (348, 334, 324), 11 VA (313), 30 VA (309), 48 VA (304)24 VDC:Nominal: 3 W Max: 10 W (348, 334, 324), 6 W (313), 11 W (309), 25 W (304)	24 VAC:Nominal: 5 VAMax: 21 VA (625, 645), 11 VA (618), 29 VA (612), 48 VA (606)24 VDC:Nominal: 3 W Max: 10 W (625, 645), 6 W (618), 11 W (612), 25 W (606)

flir thermal imaging camera for security