SSRI's NEW MODEL 1140 QUANTUM PHOTOMETER
the "Beetle" of Photometry What the VW was to transportation.. .SSRI's new Model 1140 Quantum Photometer is to photometry: a remarkably versatile instrument priced so low that even laboratories on beetle-budgets can achieve superior results. The Model 1140 provides capabilities for low light level photon counting plus extension of the dynamic range via normalized electrometer ranges for intermediate and high light level measurement (linear measurement over 9 decades of light intensities). If count ranges exceed 106 counts/ second, the unit may be switched from photon counter to electrometer mode with the push of a button; simultaneously, it changes the high voltage to photomultiplier tube. A complete system which includes: Detector As sembly (with 1P28); Amplifier/Discriminator; Electrometer; Detector Sup ply Voltage; Log-Linear Ratemeter. "Beetle-priced" far below any other unit at $1,195.00.
SSR INSTRUMENTS CO. a subsidiary of Princeton Applied Research Corp., 1001 Colorado Avenue, Santa Monica, California 90401/(213) 451-8701 Cable: Photon Telex: 65-2466. Π
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