The AV-Series offers a flexible approach to automating your gas flow, whether you require flow pacing, Residual control or Compound loop control the AV-Series offers all of the above with more. A 4 point calibration means that accuracy can be guaranteed over the whole gas range. The Auto-valve offers a simple and low maintenance approach. Outputs include a 4-20mA output as well as digital outputs which can be configured for alarm on flow / residual.