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 R13456 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 R13456 PMT's have a Spectral Response of 185 to 980nm and a Quantum Efficiency of 25% at 300nm and 9% at 600 nm.