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Dissolved oxygen transmitter
Liquisys COM253

Dissolved oxygen transmitter Liquisys COM253 ©Endress+Hauser

Compact field device for water, wastewater, utilities and fish farming

Liquisys COM253 is a standard transmitter for use with COS41 and COS61 oxygen sensors. It improves your operational safety thanks to continuous plausibility, process and sensor checks. Select from numerous hardware and software modules, such as relays or fieldbus communication, to adapt it exactly to your measuring task. This modularity also allows you to upgrade the transmitter at any time. A simple menu and calibration make configuration and operation fast and easy.

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Handle your core processes easily

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  • Specs at a glance

    • Input

      1-channel transmitter.

    • Output / communication

      0/4-20mA, Hart, Profibus.

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  • Optional add-ons
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Additional components

  • Benefits

    • More operational safety: Continuous process check system, customized alarm configuration, calibration plausibility check.

    • Reliable oxygen control: Current input for flow rate monitoring with controller shut off or for feedforward control.

    • Easy to operate...

  • Field of application

    The Liquisys COM253 transmitter works with Oxymax COS41 and Oxymax COS61 dissolved oxygen sensors in environmental applications, such as:

    • O2 control in the aeration basin

    • O2 control and monitoring of drinking water

    • Surface water monitoring

    • Process...

Features and specifications

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Details

  • Measuring principle

    Amperometric oxygen measurement

  • Application

    Water, Waste water, process, fish farming

  • Characteristic

    4-wire transmitter with graphic display.

  • Design

    Dissolved oxygen transmitter in a field housing made of PC/ABS for COS31/41/71.

  • Material

    PC/ABS-housing

  • Dimension

    247x170x115mm
    (9.63x6.63x4.48inch)

  • Temperature sensor

    Display and current output.

  • Input

    1-channel transmitter.

  • Output / communication

    0/4-20mA, Hart, Profibus.

  • Additional certifications

    CSA Gen. Purpose.

Documents / Manuals / Software

Accessories / Spare parts

Nr
Order code
Specification
    • Order code 51500320

      Kit CXM2X3 Relaismod. 2rel

      Upgrade of LIQUISYS-M basis version by 2 floating changeover contacts.

  • 290
    • Nr 290 Order code 51511446

      KIT CXM2X3 relay mod. 2rel / CSA

      Upgrade of LIQUISYS-M basis version by 2 floating changeover contacts.

  • 300
    • Nr 300 Order code 51500321

      Kit CXM2X3 Relaismodule 4rel

      Upgrade of LIQUISYS-M basic version by 4 floating changeover contacts.

    • Nr 300 Order code 51511447

      KIT CXM2X3 relay mod. 4rel / CSA

  • 290
    • Nr 290 Order code 51504304

      Kit CXM2X3 Relais Mod. 2rel.+I/CSA

      Upgrade of LIQUISYS-M basic version by 2 contacts and current input 4-20mA.

  • 300
    • Nr 300 Order code 51504305

      Kit CXM2X3 Relais Mod. 4Rel+I/CSA

      Upgrade of LIQUISYS-M basic version by 4 contacts and current input 4-20mA.

  • 40
  • 60
  • 50
  • 70
  • 80
  • 90
  • 290
    • Nr 290 Order code 71134732

      Kit CxM2x3: Relay mod. for PBDP; H/W2.1x

      Content: 1x Relay module Profibus DP 2x Relay, 1x Current input DP connection qualified from H/W 2.10

  • 250
  • 260
  • 10
  • 20
    • Nr 20 Order code 51500318

      KIT CxM2x3 power supply 24 AC/DC

      KIT CxM2x3 power supply DC

  • 410,420,46
  • 335
  • 330,340,45
  • 260,490
  • 400
  • 430
  • 470
  • 310
    • Order code 50086842

      Post mounting kit for LIQUISYS

      for mounting the field-transmitters on horizontal or vertical pipes (max. diam. 60 mm). Material: stainless steel V2A

    • Order code 51500385

      Upgrade "Plus-Package" for LIQUISYS-M

      Upgrade of LIQUISYS-M basic version (parameter pH,Cond.,Tu,CL,O2 (WX to WS)) to S-version (plus-package). Serial number of instrument needed.

    • Order code 51501679

      Upgrade "Plus-Package" for COM 2X3

      Upgrade of Liquisys-M basic version (parameter DO (DX to DS)) to S-version (plus-package). Serial number of instrument needed.

    • Order code 51500963

      Upgrade cleaning for LIQUISYS-M

      Upgrade of LIQUISYS-M basic version by cleaning functionality (Chemoclean) (serial number of instrument needed). If not yet installed, a 4-relay board must be ordered separately (51500321).

  • Predecessor

Success stories

  • Industrial WWTP at Pasfrost Industrial WWTP at Pasfrost

    Compliance made easy

    The automated phosphate monitoring with Liquiline System CA80PH helps the food company Pasfrost ensure the compliance with the strict limit values for its industrial wastewater.

  • Pasfrost plant in Passendale, Belgium Pasfrost plant in Passendale, Belgium

    Conductivity measurement in a water reuse plant

    Pasfrost relies on Memosens CLS82D for the conductivity measurements in its water reuse plant. The sensor provides precise measurements even of very low conductivity values.

  • The aeration tank of a sewage treatment plant. The aeration tank of a sewage treatment plant.

    On the trail of orthophosphate

    White Paper on Orthophosphate Measurement in Municipal Sewage Treatment Plants

  • Sustainable wastewater treatment at Emmi's milk processing plant in Dagmersellen, Switzerland Sustainable wastewater treatment at Emmi's milk processing plant in Dagmersellen, Switzerland

    Making a clean job of it at Emmi

    Efficient wastewater treatment with Oxymax COS61D in the Sequencing Batch Reactor of a dairy company

  • The Stadtlohn WWTP regulates nitrogen reduction using the Liquiline Control. The Stadtlohn WWTP regulates nitrogen reduction using the Liquiline Control.

    Controlled by Liquiline Control

    Liquiline Control regulates nitrification and denitrification in the Stadtlohn wastewater treatment plant. The control system ensures compliance with limit values and optimized energy usage.

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