Model 262 Flat Response (450-950) Sensor Head Power Range (watts) 1 x 10-11 to 1 x 10-2 Calibration l in the range of 350-1100 nm Effective Aperture 0.44 cm2 Typical Response 0.1367 A / W @ 600 nm Compatible Accessories 2575 Sensor/Minisphere Combination Features Radiometric filter