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To contact Ryan Sheldon about Application Engineering, Product Usage, Trouble Shooting, and other technical information including:
  • Product Questions
  • Technical Assistance
  • Application Engineering
  • Visual Basic 6 Programming Assistance
Email us at tech0001@relaycontrollers.com

COMCAST.NET Users Beware, we are NOT able to respond to any emails sent from COMCAST.NET.
COMCAST.NET has misidentified our servers as a SPAM server and blocked all of our return email communications.
To contact Xu Shirui about Advanced Programming Applications and Custom Programming.  Xu is located in China, and is an EXCELLENT programming resource for any custom programming projects you may require.  We are in constant communication with Xu, as he is actively building our NCD ActiveX Control.
  • NCD ActiveX Control
  • NCD Telnet Control
  • Advanced Programming
  • Contract Programming
  • Internet Control Solutions
  • Visual Studio 2005 & 2008
  • C# and Other Programming Languages
Email us at xu@relaycontrollers.com

COMCAST.NET Users Beware, we are NOT able to respond to any emails sent from COMCAST.NET.
COMCAST.NET has misidentified our servers as a SPAM server and blocked all of our return email communications.

To contact us about your web order see our Web Order Contact Information.

Office Contact Info

  National Control Devices, LLC  
  PO Box 455 Office Hours:
  Osceola, MO 64776     Monday-Friday
         9:00AM to 4:00PM
  FAX: (866) 562-0406     Central Standard Time
  Office: (417) 646-5644

Notice: We are Closed All US Banking Holidays