Hamamatsu Photomultiplier Tube: 28mm Diameter Photocathode, 9-Stage, Side-On, Cathode Luminous Sensitivity: 650渙/lm
Photomultiplier tubes (PMT) are extremely sensitive light detectors which amplify the current produced by incident light, allowing individual photons to be registered and observed. PMT's are used in a variety of applications which require ultra-sensitive photometric capabilities such as:

Biomedical Analysis: Florescence Immuno Assy, Flow Cytometer, MTP Reader
Environmental Monitoring: NOx Analyzer
Spectroscopy: UV-VIS Spectrometer, Fluorescence Spectrometer, Atomic Absorption, Raman Spectrometer
Semiconductor Industry: Wafer Inspection, Particle Counter

These R10699 PMT's are side-on photomultiplier tubes, using a circular-cage type electron multiplier which has the benefits of compactness and fast response time. Side-on PMT's often demonstrate higher quantum efficiencies than head-on (end-on) PMT's having photocathodes of similar composition. Typical head on PMT's use a Box and Grid type dynode setup and can experience slow response time in some applications. Side-on PMT's are relatively low cost compared to head-on and are standard in photometrics. These R10699 PMT's have a Spectral Response of 185 to 900nm and a Quantum Efficiency of 20% at 600nm and 10% at 780 nm.