X9₄ Photometer
ISD-5-VL-4 Luminous Flux Detector

The X9₄ (Xnine four) meter plus ISD-5-VL-4 (previous LSM-9901-4) integrating sphere detector is a compact lightweight photometer for the measurement of luminous flux in lumen (lm). The ISD-5-VL-4 luminous flux detector is set-up with a compact 50mm diameter integrating sphere with 12.5mm measurement port and a photodiode detector with precise photometric correction filter. It’s V(λ) spectral sensitivity matches the DIN CIE standard to equal or better than 5% for DIN Class B specification. The integrating sphere supports the measurement of directional light sources, e.g. cold light sources with light guide and other narrow beam sources. The X9₄ meter is a handheld battery operated meter with 9 mm high character LCD display for easy viewing. Its high linear current to voltage amplifier offers seven manually or automatically selected gain ranges. The max. error within this wide dynamic range is 0.2 %. Operating the X9₄ is simple. Once set-up all settings are stored and recalled on next power-up. The meter is operated by a standard 9 V battery. BHO-01 hard-shell case is optionally available.