©Endress+Hauser
Specs at a glance
Output / communication
0/4-20mA, Hart, Profibus.
Field of application
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.
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 water treatment and monitoring
O2 control in fish farming for optimum growth conditions
Liquisys COM253 features the following protocols and interfaces:
0/4...20 mA
HART
PROFIBUS DP
PROFIBUS PA
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 and service: Simple single-point calibration in air, air-saturated water or in the medium, direct access for manual contact control.
Reduced maintenance: Automatic cleaning function (with Chemoclean) triggered by alarm or limit switch.
Fit for every application: Numerous extensions, e.g. P(ID) controller, timer, etc., allow for flexible adaption to all processes.
Success stories
An automated system for pH measurements at AVR
AVR Waste in Botlek, Rotterdam, processes up to 1.7 million tons of residual waste per year. Discover how they optimized their pH measurement thanks to Endress+Hauser
Read the full story
Simple products
Easy to select, install and operate
Technical excellence
Simplicity
Standard products
Reliable, robust and low-maintenance
Technical excellence
Simplicity
High-end products
Highly functional and convenient
Technical excellence
Simplicity
Specialized products
Designed for demanding applications
Technical excellence
Simplicity
FLEX selections
Technical excellence
Simplicity
Fundamental selection
Meet your basic measurement needs
Technical excellence
Simplicity
Lean selection
Handle your core processes easily
Technical excellence
Simplicity
Extended selection
Optimize your processes with innovative technologies
Technical excellence
Simplicity
Xpert selection
Master your most challenging applications
Technical excellence
Simplicity
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.
Dimension
247x170x115mm
Temperature sensor
Display and current output.
Output / communication
0/4-20mA, Hart, Profibus.
Additional certifications
Most downloaded
Operating Instructions Liquisys M CXM223/253 HART
English version - 10/2005
Field Communication with Liquisys M CXM223/253
EN
DE FR
01/10/2005
01/07/2002
Language:
English
Version:
01/10/2005
File size:
541.4 KB
File name:
BA208CEN.pdf
Model 840 / 842
Operating instructions
English version - 07/2002
Transmitter for dissolved oxygen
Language:
English
Version:
01/07/2002
File size:
1.7 MB
File name:
BA199e10.pdf
20 documents
Liquisys M COM223/253
Technical Information
Transmitter for oxygen sensors
EN
German French Italian Polish Russian Turkish Chinese
31/12/2014
24/10/2013
20/06/2011
15/09/2005
01/07/2005
Language:
English
Version:
31/12/2014
File size:
822 KB
File name:
TI00199CEN_1514.pdf
Operating Instructions Liquisys M CXM223/253 HART
Field Communication with Liquisys M CXM223/253
EN
German French
01/10/2005
01/07/2002
Language:
English
Version:
01/10/2005
File size:
541.4 KB
File name:
BA208CEN.pdf
Model 840 / 842
Operating instructions
Transmitter for dissolved oxygen
Language:
English
Version:
01/07/2002
File size:
1.7 MB
File name:
BA199e10.pdf
Liquisys M COM223/253
Operating Instructions
Transmitter
EN
Czech Danish German Spanish French Italian Japanese Dutch Polish Portuguese Russian Chinese
01/09/2015
24/10/2013
20/06/2011
15/09/2005
01/07/2005
Language:
English
Version:
01/09/2015
File size:
2.4 MB
File name:
BA00199CEN_1515.pdf
Operating Instructions Liquisys M CXM223/253 PROFIBUS
Field Communikation for Liquisys M CXM223/253
EN
German French Italian Polish
01/12/2011
01/08/2009
01/09/2007
01/07/2006
01/10/2005
Language:
English
Version:
01/12/2011
File size:
1.7 MB
File name:
BA209CEN_1311.pdf
Ex-safety instructions CXM2X3
Safety instructions for electrical apparatus for explosion-hazardous
EN
German French
07/06/2005
27/09/2004
29/02/2004
Language:
English
Version:
07/06/2005
File size:
2.5 MB
File name:
XA194CA3.pdf
Additional information for CSA Liquisys
Additional information for CSA Liquisys
Language:
English
Version:
24/09/2013
File size:
84.3 KB
File name:
CXM2X3_Beiblatt for CSA.pdf
Installation of M 12 plug
Special Documentation Installation of M 12 plug
Language:
English
Version:
01/10/1999
File size:
85.5 KB
File name:
SD052CA2.pdf
Instructions for service kits Liquisis M
Special documents
Language:
English
Version:
01/05/2000
File size:
198.2 KB
File name:
SD084CA2.pdf
Product family: Liquisys chlorine, Liquisys conductivity, Liquisys oxygen, Liquisys pH/ORP
Product root: CCM223-, CCM253-, CLM223-, CLM253-, COM223-, COM253-, CPM223-, CPM253-
EN
German French
17/07/2023
Language:
English
Version:
17/07/2023
File size:
321 KB
File name:
EC_00575_02.23_CxM2x3.pdf
60 spare parts & accessories
60 spare parts & accessories
60 spare parts & accessories
Kit CXM2X3 Relaismod. 2rel
KIT CXM2X3 relay mod. 2rel / CSA
Drawing number
Order code
290
51511446
Kit CXM2X3 Relaismodule 4rel
Drawing number
Order code
300
51500321
KIT CXM2X3 relay mod. 4rel / CSA
Drawing number
Order code
300
51511447
Kit CXM2X3 Relais Mod. 2rel.+I/CSA
Drawing number
Order code
290
51504304
Kit CXM2X3 Relais Mod. 4Rel+I/CSA
Drawing number
Order code
300
51504305
KIT COM2x3 Central module I1
Drawing number
Order code
40
51501225
KIT COM2x3 Central module I1 HART
Drawing number
Order code
60
51501223
KIT COM2x3 Central module I2
Drawing number
Order code
50
51501222
KIT COM2x3 central module I2 HART
Drawing number
Order code
70
51501226
KIT COM2X3 central module Profibus PA
Drawing number
Order code
80
51501227
Kit COM2X3 central module Profibus DP
Drawing number
Order code
90
51502500
Kit COM2x3: Central mod. PB DP; H/W 2.1x
Drawing number
Order code
90
71134729
Kit CxM2x3: Relay mod. for PBDP; H/W2.1x
Drawing number
Order code
290
71134732
KIT MKO1 Transmitter O2/Temperature
Drawing number
Order code
250
51501207
KIT MKO1 Transmitter O2/Temp./pressure
Drawing number
Order code
250
51501208
KIT MKO5 Transmitter O2/Temp./pressure
Drawing number
Order code
260
51506938
KIT CXM2X3 power supply 100..230 V AC
Drawing number
Order code
10
51500317
KIT CxM2x3 power supply 24 AC/DC
Drawing number
Order code
20
51500318
Drawing number
Order code
410,420,46
51501068
Kit CxM253: Front foil + 6 key lifters
Drawing number
Order code
335
71071446
KIT COM253 sensor panel jack SXB
Drawing number
Order code
490
51506966
KIT CXM253 Internal housing parts
Drawing number
Order code
330,340,45
51501073
KIT CXM253 bottom of housing
Drawing number
Order code
400
51501072
KIT CXM/153/253: 2 pair of hinges
Drawing number
Order code
430
51501069
KIT CXM253 terminal strip power supply
Drawing number
Order code
470
51501079
Drawing number
Order code
310
51501074
Upgrade "Plus-Package" for LIQUISYS-M
Upgrade Kit from COS41 to COS31+COS61
Drawing number
Order code
260,490
51517800
Post mounting kit for LIQUISYS
Upgrade "Plus-Package" for COM 2X3
Upgrade cleaning for LIQUISYS-M
We value your privacy
We use cookies to enhance your browsing experience, collect statistics to optimize site functionality, and deliver tailored advertisements or content.
By selecting "Accept all", you consent to our use of cookies.privacy policy .
Customize
Accept only essential
Accept all
