SiteSentry4 Web Based 4 Channel Remote Monitor & Controller

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The CircuitWerkes SiteSentry4 ushers in a new era of remote site monitoring. An internal Web server lets you monitor your site from any Web browser, anywhere in the world. Automatically detects both meter low and meter overload conditions on each channel. Combine channels to create IF/OR/AND alarm conditions. An internal temperature sensor can respond to high or low temperature conditions. Temperatures can be scaled and are displayed in Fahrenheit or Celsius. The external audio monitor meters two channels of audio and can respond if either silence or overload are detected.

Multipurpose control functions: The SiteSentry4 gives you Web control of six relays (two are DPDT) that can be latching or momentary. Two status inputs give a visual indication, via the Web server, whenever triggered & can also activate automated relay actions. Use the SiteSentry4 anywhere that you need an inexpensive, network addressable, controller with status capabilities. Three levels of user control are available ranging from reader up to administrator.

Automatic (user programmable) functions: When meter-low, overload, or external status change, is detected, the SiteSentry4 can perform user-programmed, automated, sequences of actions and can also respond to user control via the network or via external contact closure inputs. Actions can be programmed to run once or to repeat while the condition exists. Alternate actions (or cancellation of previous actions) can be set to run when the conditions return to normal.

E-mailing/SMS Texting: The SiteSentry4 supports SMTP and can send both e-mails and SMS text (to your phone) messages that alert you of alarm conditions. E-mailing is accomplished directly from the SiteSentry4 hardware. Additionally, the free software that is coming soon for the SiteSentry4 is also capable of sending e-mail or SMS messages. The software can also launch your default e-mail client (like Outlook Express) and send e-mails using that.

Dynamic DNS (DDNS): The SiteSentry4 supports dynamic IP redirect services like and This allows you to use the SiteSentry4 on a dynamic IP instead of paying for a static IP. With DDNS, you can find your unit by name instead of by typing an IP number.

Free Upgrades: The SiteSentry4 is field upgradable. When new features are added or when a bug is found, you can easily and safely upgrade the units in the field with the latest firmware through the webserver. With free upgrades, you can always keep your SiteSentry4 up-to-date.

Up to two SiteSentry4s can be optionally rack mounted in a single sized rack shelf. Administrators can perform all setup through the web server.

The SiteSentry4 includes free multi-site monitoring monitoring software. User settings & labels can be saved to the host computer and uploaded to the original SiteSentry4, or to others for mass programming.

  • Internal Web Server lets you monitor your site from anywhere in the world.
  • Channel monitoring via meters and digital readout of values.
  • Send e-mail or SMS text messages directly from the device.
  • All configuration data can be stored locally on a PC for re-use later. Never lose your configuration data again!
  • Supports DDNS services from and
  • Remote reboot command
  • Web server supports netbios names for easy location.
  • Fully Flash upgradeable. Upgrade your unit’s firmware in the field to use newly released features.
  • Can be used as a Shoutcast/ Icecast compatible audio streamer with embedded relay closures (non-sync’ed to the audio).
  • Onboard dual input audio monitor can detect silence or overload on stereo or mono systems.
  • Web interface knows when it has lost communications with the site and alerts you and tries to reconnect automatically.
  • On-board temperature sensor displays Fahrenheit or Celsius.
  • 16 user-definable alarm conditions can trigger up to 3 actions (from a pool of 68) per alarm.
  • Two external status inputs can activate user-defined actions. Inputs are optocoupled and triggered by grounding or by supplying a voltage (user configured).
  • Six independent relay outputs (4 SPST & 2 DPDT), controlled by action sequences or by user command. Latching & momentary modes are supported.
  • Relays can be momentary or latching.
  • DHCP or Static IP capable.
  • Free Multi-Site monitoring software coming soon!
  • Free software has integrated logging capability & SMS / e-mail alerting for alarm conditions.
  • MAC address and Netbios name can be user changed.