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HjemBænkinstrumentCountersSRS SR430 Multichannel Scaler/Averager

SRS SR430 Multichannel Scaler/Averager

SRS SR430 Multichannel Scaler/Averager
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SRS SR430 Multichannel Scaler/Averager
SRS SR430 Multichannel Scaler/Averager

The SR430's analog input has a 50 Ω input impedance and an input range of ±300 mV.

The maximum input sensitivity is 10 mV, and if your input signal level is less than this a preamplifier (like the SR445) should be used.

The input is followed by a discriminator with a selectable slope and a threshold adjustable between ±300 mV.

A discriminator BNC output is provided at the front panel that generates a NIM level (0-.7 V, active low) signal corresponding to each count.




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  • 5 ns to 10 ms bin width
  • Count rates up to 100 MHz
  • 1k to 32k bins per record
  • Built-in discriminator
  • No interchannel dead time
  • On-screen data analysis
  • Hardcopy output to printers/plotters
  • DOS compatible 3.5" drive
  • GPIB and RS-232 interfaces

The SR430 is the first multichannel scaler which combines amplifiers, discriminators, bin clocks, and data analysis in a single, integrated instrument. With its many features and its easy-to-use menu driven interface, the SR430 simplifies time-resolved photon counting experiments.


The SR430 Multichannel Scaler/Averager can be thought of as a photon counter that counts events as a function of time.

A trigger starts the counter which segments photon count data into sequential time bins (upto 32k bins).

The width of the bins can be set from 5 ns to 10 ms.

The instrument records the number of photons that arrive in each bin.


The SR430 is useful in a variety of applications where it is necessary to count events as a function of time: LIDAR, time of flight mass spectroscopy, and fluorescence decay measurements are just a few examples.


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Delivery address: Folkungavägen 4, 611 34 Nyköping, Sweden
E-post:  International phone +46 155 26 70 30  Fax +46 155 26 78 30