What is an AS440 AVR?

A Stamford AS440 is an Automatic Voltage Regulator, that is used on a wide range of Stamford Alternators. The Stamford company name has been Newage International, Stamford AVK and Cummins Generator Technologies.

What does the AS440 AVR look like?

The AS440 AVR looks like the images below. This is an original Stamford AS440 AVR. The current Stamford AS440 AVR looks like this. Make sure you don't buy a fake AVR as these can be very damaging for you and your Diesel Generator.