HAGNER EC1-L SCREEN LUMINANCE AND FILM DENSITY METER
The Hagner EC1-L is a compact instrument for measuring the luminance of luminous screens, for
instance of film and slide viewers, X-ray viewers etc., and for easy calculation of film density. It has
both an automatic zeroing and an on/off switch and the only controls needed are four position
range selection switch and a hold button to retain the displayed value.
The opening of the detector, which should be pressed against the screens, has a round aperture with
an area of 100mm2.
The meter is normally calibrated to read from 1 cd/m² to 2,000,000 cd/m² in four measurement
ranges. This calibration is suitable for X-ray viewers. Other ranges, for instance from 0.1 – 200,000
cd/m² can be supplied on request.
The calculation of film density requires also a simple calculator which will give the logarithm to base
10 of a number (LOG10).
Specification
Detector : Silicon photodiode Vλ– filtered
Measuring range : 0.1 – 199,900 cd/m² or 1 – 1,999,000 cd/m²
Accuracy : Better then +/- 3% (+/- 1 in last digit)
Power Supply : 9 Volt battery type PP3 (lifetime 350 hours)
Dimensions : 130 x 75 x 35 mm
Weight : 0.24 kg
Part No
Hagner Luminance Meter Model EC1-L
