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Compod Air Flow Sensor

Compodâ„¢ Flow Sensor and Flow Control Valve for SmartTrak 100 Series

Compod Programmable Flow Sensor Control Module, Multi-Drop R

Simplify basic flow sensor control installations with Compod!

With its advanced mass flow sensor capabilities, the Compod™ control valve, coupled with Sierra’s SmartTrak® 100 mass flow meters (MFM’s) or controllers (MFC’s) greatly simplifies air flow control systems and permits networking of multiple instruments using open-source MODBUS RTU protocol. Compod™ also monitors the functionality of the mass flow meter or controller and includes diagnostics, notifying users of valve faults or system upsets. By adding the Compod flow sensor control valve to a new or existing SmartTrak® MFM or MFC, end users can take complete control. Two digital outputs and one analog input can be configured by the user for a wide variety of air flow process controls including:

Plug our innovative new Compod into the face of any Smart-Trak 2 and streamline, simplify and save.  

With a Compod, SmartTrak 100 becomes a fully network-enabled multi-drop RS-485 / Modbus RTU air flow sensor, allowing you to perform the same functions as much more complex systems at a fraction of the cost.

Daisy-chain multiple MFC’s on a single network, then send and receive data, alarms and commands  or perform remote diagnostics and data logging
Reduce costs by automating complex gas processes with a  Compod-enalbed Smart-Trak 2

Compod Software Interface Screen Shots:

More Flow Sensor Features:

•    Controls simple processes without the need for external PLCs or computers
•    Acts as a vital link in a complex process control network
•    Monitors the operation of instruments and provides potential problem alerts
•    Is available with a local LCD Display for local monitoring
•    Can be used with new instruments or added to existing models

With all of the above features, the Compod flow valve can perform the same functions as much more complex control systems at a fraction of the cost, so using Compod™ is smart in more ways than one.

An internal Compod can also be added inside the industrial enclosure of the Max-Trak® Model 180 to obtain most functions.

Users can utilize Sierra’s included flow sensor software or write proprietary software using open-source MODBUS protocol to configure standard functions for the Smart-Trak®.  Compod’s two digital output channels and the analog input channel and a configurable pulse output channel can automate gas processes without the need for an external PLC or computer.



Product Related Documents & Downloads


  File Title Version Release Date
  Compod Programmable Control Module Technical Datasheet A 04/16/2013


  File Title Version Release Date
  Compod Programmable Control Module Product Software V2.1.1 10/02/2013

Digital Communications - Modbus RTU(2)

  File Title Version Release Date
  Compod Control Module Instruction Manual E 04/02/2015
  Compod Programmable Control Module Quick Installation Guide D 04/02/2015


  File Title Version Release Date
  ARRA Certificate of Conformity 8/5/14 08/06/2014
  CRN Approval 1.0 11/20/2008
  CRN Approval 0F09333.2 Alberta 1.0 12/21/2010
  CRN Approval 0F09333.21 British Columbia 1.0 12/29/2008
  CRN Approval 0F09333.23 Saskatchewan 1.0 09/09/2009
  CRN Approval 0F09333.24 Manitoba 1.0 11/20/2008
  CRN Approval 0F09333.25 Ontario 1.0 12/29/2008
  CRN Approval 0F09333.26 Quebec 1.0 04/09/2009
  ISO 9001:2008 1.0 01/22/2013


  File Title Version Release Date
  Terms and Conditions 1.0 11/01/2010
  Service Brochure 2.0 04/06/2015
  Sierra Clean Energy Guide V1 01/28/2011
  Warranty Statement 2.0 04/01/2015
  Full Line Product Offering V4 09/21/2015
Inside Sierra and it’s Compod with SmartTrak Watch this short video to get quick birds-eye view into Sierra and a “how-it-works” lesson on our Compod which simplifies basic flow control installations to save you money and time. Watch video now.
Modbus RTU

Modbus RTU

Sierra supports Modbus RTU digital communication protocol for flexible integration of our mass flow meters and controllers into any automation or control system. Modbus Protocol is a messaging structure developed by Modicon in 1979. It is used to establish master-slave/client-server communication between intelligent devices.
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