Useful power range

20
to
220 W

100
to
1100 W

200
to
2200 W

1000
to
11,000W

Exposure time

20 Sec

20 Sec

20 Sec

10 Sec

Resolution

0.1 W

1 W

1 W

10 W

Head Diameter

1.5” C
1.5” Y

1.9” C
2.5” Y

2.4” C
3 “ Y

3” C
3.5” Y

Head Length

0.5 “ C
0.4” Y

2.0 “C*
1.0” Y

2.3” C*
1.3” Y

3.5” C*
2.2” Y

Accuracy

± 5%

± 5%

± 5%

± 5%

Repeatability

± 1.5%

± 1.5%

± 1.5%

± 1.5%

NIST Certificate

Upon request

Upon request

Upon request

Upon request