The odorizing unit control system is designed to automatically control the process of supplying odorant to a gas pipeline in proportion to the actual natural gas flow with a given degree of odorizing.


The odorizing unit control system is based on the REGUL R400 programmable logic controller and the REGUL R200 I / Os. The system is equipped with adapters and spark-protection barriers to safely connect measurement equipment and actuators.
The REGUL R400 plays the role of an operator console to set the system and process parameters, visualize technological information, and show events and a breakdown history on the panel display. Additionally, information can be sent to external systems via digital communication channels (RS-485 and Ethernet) or printed out as reports.

Major functions

  • Supply odorant at a required concentration in proportion to the gas flow
  • Control supply of the odorant (feedback from the flow controller)
  • Monitor level of the odorant in the supply tank
  • Monitor pressure monitoring in the supply tank
  • Log events and breakdowns
  • Generate reports
  • Print reports (via a USB / Ethernet-connected printer)
  • Control access according to the user permissions
  • Transfer information via RS-485 (Modbus RTU) and Ethernet (Modbus TCP)
  • Store data on an external USB flash drive

Structural scheme of Odorising Unit Control System

Structural scheme of Odorising Unit Control System