Specifications

Absolute Calibration: ± 5% traceable to the U.S. National Institute of Standards and Technology (NIST)

Sensitivity: Typically 30 μA per 100 klux

Linearity: Maximum deviation of 1% up to 100 klux

Stability: < ± 2% change over one year

Response Time: Less than 1 μs (2 m cable terminated into a 604 Ω load)

Temperature Dependence: ± 0.15% per °C maximum

Cosine Correction: Cosine corrected up to 82° angle of incidence

Azimuth: < ± 1% error over 360° at 45° elevation

Tilt: No error induced from orientation

Operating Temperature Range: -40 °C to 65 °C

Detector: High stability silicon photovoltaic detector (blue enhanced)

Sensor Housing: Weatherproof anodized aluminum case with acrylic diffuser and stainless steel hardware; O-ring seal on the sensor base

Size: 2.36 cm Diameter x 3.63 cm (0.93" x 1.43")

Weight: 24 g head; 60 g base and cable (2 m) with screws

Cable Length: 2 m, 5 m, 15 m, 50 m (6.5', 16.4', 49.2', 164')

2420 Light Sensor Amplifier Specifications

Power Requirements: +3.8 to 28 V (1 mA over full range)

Operating Temperature Range: -40 °C to 50 °C

Turn-on Time: 120 ms

Amplifier Output: -2.5 to 5.0 V

Output Offset Voltage: -10 to 10 μV

Amplifier Gain Range: 0.025 to 0.375 V μA^-1

Amplifier Gain Accuracy: ± 0.1% typical (± 0.15% max) of gain setting

Amplifier Output Noise: 0.5 μV rms (0.375 V μA^-1 Gain, 0.1 to 10 Hz Bandwidth)

Amplifier Output Loading: ≥ 10 kΩ

Response Time: 10 Hz

Cable Length: 0.9 m