Zero Chlorine Analyzer / Control System

Offering Ease of Use, accuracy and reliability, the EMEC LDSCL PLUS Zero Chlorine Analyzer and Control System provides a solution for measuring Zero Chlorine in water systems. Using the latest in Amperometric Cell Technology, the EMEC sensor has a life expectancy of up to 3 years without the need for constant Chlorine being present in the water. Readings are continuous, and updated every second. Built-in Temperature and pH Compensation are standard on all models.

The System below consists of the Controller, Filter, Flow Cell and Chlorine Sensor:

Analyzer System on Backboard

EMEC Analyzer System on Backboard

Brief System Explanation

The image on the left shows a typical installation consisting of the following devices:

  • Filter – Typically a 60 micron filter is sufficient to keep particles and debris in the process water from entering the flow cell.
  • Analyzer – The EMEC LDS PLUS series of analyzers are user-friendly, and automatically cater to the different sensors that can be attached.
  • Flow Cell – The acrylic see-through flow cell incorporates the following items:
      • Flow Sensor: on the left of the flow cell is a flow switch, and upon adequate flow, the silver bullet-shaped float rises and triggers the flow sensor indicating to the system that adequate flow is now present, and control functions can be activated.
      • Temperature Sensor: the RTD sensor is located above the silver bullet float, and is used for temperature readout or compensation if required.
      • Sensor: The larger green and beige probe is the Amperometric sensor for measuring the amount of Chlorine in ppm and will be displayed on the Analyzer.
      • The flow cell also contains an inlet pressure and flow regulator, and an easily accessible water sample port.

Individual System Components

Model: EMEC LDSCL PLUS

Zero Chlorine Controller

EMEC Zero Chlorine Analyzer & Controller

Description

The EMEC Series LDSCL PLUS Analyzer / Controller offers cost-effective, user friendly control of Chlorine for Industrial Water Treatment applications. This controller accommodates special EMEC Zero Chlorine sensors, using Amperometric technology designed to read the absence of Chlorine in fresh water. PID Control is standard on all controllers.

The user-friendly interface limits the need for reading the detail in the instruction manuals, and if you are familiar with programming other brands of controllers, you will find this to be the cutting edge, and easiest of set-ups.

  • PID Zero Chlorine Controller
  • User Friendly Encoder wheel menu, with back-lit LCD Display
  • Control Outputs for PID 4-20mA, 2 x Pulse, & 2 x Relay
  • 4-20mA Outputs for PPM, and Temperature
  • Alarm & Probe Cleaning relays
  • Communication via Ermes Webserver or modbus
  • Optional mA or pulse water meter inputs for Feed-forward control
  • Optional Communication interfaces for Ethernet, GSM, or Modbus
  • Optional Communication interface provides Ermes Web-server access for on-line monitoring and data-logging
  • Use with EMEC Series PEF Flow Cell, and SCL Amperometric Chlorine or Chlorine Dioxide Sensor
  • Discharge of Treated water into Streams, Rivers etc.
  • Disinfection Systems
  • Water Treatment
  • Household
  • Pharmaceutical
  • Laboratory

Model: EMEC PEF1R

Chlorine / Chlorine Dioxide Flow Cell & Probe Holder

EMEC Zero Chlorine Sensor Flow Cell

Description

The EMEC Series PEF Flow Cells / Probe Holders are made of See-Through Acrylic PMMA Material, for long lasting use.

With the unique, easy flow design, they come standard with Flow Sensor, Flow Adjustment, Built-in Sample Port, and Vent.

  • Includes EMEC SEPR Flow sensor – Flow Indication via a Red LED
  • Built-in Temperature Sensor
  • Standard Tubing and Fittings
  • Includes Pressure & Flow Regulator
  • Flow Adjustment Knob
  • Built-in Sample Port
  • Use with EMEC SCL Series Amperometric Sensors

Model: EMEC SCL3N

Zero Free Chlorine Amperometric Sensor

Model: EMEC SCL8

Zero Total Chlorine Amperometric Sensor

EMEC Amperomectric Zero Chlorine Sensor

Description

The EMEC SCL3N and SCL8 Closed Amperometric Sensors offer reliable, repeatable and accurate measurements, used for the absence of Free or Total Chlorine respectively. Readings are in real-time, with the unique sensor technology that can operate without Chlorine residual.

With the unique membrane and electrolyte, measurements are almost instantaneous with the controller updating the display every second.

  • EMEC SCL Digital sensors compatible with EMEC LDSCL PLUS Controller
  • Digital interface to controller
  • pH, and Temperature Compensated
  • 15 PSI (1 Bar) Max Pressure
  • SCL3N for zero inorganic free chlorine – ideal for absence of Chlorine measurement for fresh water (0-0.50 or 0-2.000 ppm)
  • SCL8N for zero total chlorine – ideal for absence of Chlorine measurement for fresh water (0-2.000 ppm)

Optional Re-circulation System for Calibration

Re-circulation System

Recirculated Generic Calibration Block Diagram

Re-circulation System Brief Explanation

With water analyzer systems, it may be challenging to accurately calibrate the analyzer due to the process ppm changing from the time the sample is taken, to the time the analyzer is actually calibrated.

For example: the analyzer is reading 1.05 ppm at the time the sample is taken. Then by the time the sample is confirmed by a 3rd party measurement (hand-held or lab test) to be say 1.3 ppm, then by the time the operator comes to calibrate the analyzer, the reading might be lower or higher than 1.05 ppm, so calibrating the controller to 1.3 ppm based on the analyzer initially 1.05 ppm would now be incorrect.

To solve this problem, we can provide a closed-loop water sample to the flow cell which would provide a stable sample to be calibrated correctly. Isolation valves are used to direct the water flow in a recirculated loop to the flow cell, while isolating the incoming process water. The system consists of a re-circulation pump, valves, fittings, and tubing to suit. The container would be supplied by the customer to suit the size and location of the process.

Download the re-circulation block diagram here

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