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17
Figure 8 shows how the D:S ratio compares on-screen for both models. The
higher the ratio, the smaller the target area needs to be for an accurate
measurement. Figure 9 illustrates the detection ability.
VT02 D:S = 6:1 VT04A/VT04 D:S = 9:1
hak21.eps
Figure 8. On-Screen Comparison of D:S Ratio
A
B
Can detect a 1" spot in your field of view that
is at least 5 °C different from the surrounding area.
A
B
VT02
25 mm @ 762 mm
1 in @ 30 in
VT04A/VT04
25 mm @ 1090 mm
1 in @ 43 in
hak14.eps
Figure 9. Detection Ability