H7828

The H7828 series are photon counting head devices using a 19 mm (3/4") di-ameter head-on photomultiplier tube, high-speed photon counting circuit, and high-voltage power supply circuit. The high voltage supply for photomultiplier tube and the discrimination level are preset to optimum levels, allowing photon
counting measurement by just connecting a +5 V supply. Despite its compact size, the effective photosensitive area is as large as 15 mm in diameter, so the incident light can be collected very efficiently. Compared to other PMT mod-ules, the H7828 series devices have higher resistance to vibration and shock, making H7827 suitable for portable or mobile measurement equipment. Two types of photomultiplier tubes with different spectral response characteristics are provided for measurement in the visible range or visible to near IR range.