Model 3820 Universal Counter

Digitally-signed USB driver suitable for Windows 7 32 and 64 bit, Vista 32 and 64 bit, and Windows XP 32 bit now available.

Model 3820 Universal Counter


We regret that the Model 3820 Universal Counter is now obsolete and is no longer available. Existing customer can, however, still obtain the operating software and drivers by following the links from this page.

Already using a model 3820?
Version 3.0 of the software is fully compatible with Windows XP 32 bit, Vista 32 and 64 bit, and Windows 7 32 and 64 bit operating systems. It includes a USB driver, updated ActiveX control and new help files for both the counter software and the control. The Universal Counter application software generates data logging files that are compatible with those created by the older package, so in most cases users of the older software will get better performance by completely uninstalling it and replacing it with the new programs, which are available free of charge by clicking the link below.

Download Software
The SR3820Counter, SR3820Comms ActiveX control, sample files, and the latest USB drivers for this instrument are available by download from this website by clicking the link below.

Product support and upgrades are automatic and free of charge to existing users of the model 3820 Universal Counter. If you have already purchased the product and installed the software then you can simply download and install any later software version by clicking the link below.

To check if you need to upgrade, see the product version number on the distribution CD or in the program's "About" box and verify if this matches the version given below. If it is a lower number then you should upgrade.

Current Version
Number (Application
3.0 SR3820 Counter Software v3
Date: 27th October 2008
Current Version
Number (USB Driver
Date: 14th February 2011