Outdoor photometric probe for measuring ILLUMINANCE (0…150 Klux), CIE photopic filter, diffuser for cosine correction. mVdc output for klux. Complete with Calibration Report. On request 5 or 10 m cables with connectors.
LPPHOT02… probe measures illuminance (lux), defined as the ratio between the luminous flux (lumen) passing through a surface and the surface area (m²).
The spectral response curve of a photometric probe is similar to the human eye curve, known as standard photopic curve V(λ). The difference in spectral response between LPPHOT02 and the standard photopic curve V(λ) is calculated by means of the error f1′.
LPPHOT02 is designed and constructed for outdoor installation for long periods. The photometric measurement for external use is used for the measurement of daylight in climatological and meteorological applications.
The luxmeter is produced in three versions:
- LPPHOT02 – passive (mVdc output for klux);
- LPPHOT02AC – active (4…20 mA output);
- LPPHOT02AV – active (0…1 Vdc, 0…5 Vdc or 0…10 Vdc output to be defined when ordering)
The illuminance range for the analog output is 0…150 klux.
Each luxmeter is individually calibrated at the factory and is distinguished by its own calibration factor. The calibration is performed by comparison with the reference lux-meter of the Senseca metrology laboratory, using an illuminant “A” as a source, as re-quired by CIE publication N°69 “Methods of characterizing illuminance meters and luminance meters: Performance, characteristics and specifications”.
