Endress+Hauser COM223-DX0005 Liquisys Dissolved Oxygen Transmitter

Overview

The Endress+Hauser COM223-DX0005 is a factory-configured order code of the Liquisys COM223 dissolved oxygen transmitter, a single-channel, four-wire panel-mount instrument built for continuous amperometric dissolved oxygen measurement in water and wastewater treatment processes. The DX0005 configuration ships with a 230VAC power supply, a primary-value 0/4–20mA output, and OS41 sensor input compatibility for the COS4/4HD amperometric oxygen sensor family, giving plant instrumentation teams a ready-to-commission transmitter rather than a build-to-order unit that adds lead time to a straightforward aeration control application.

As the official authorized partner and exclusive regional representative for Endress+Hauser, Seven Star LLC proudly supplies the COM223-DX0005 to municipal utilities, industrial water treatment plants, and process facilities across the Sultanate of Oman and the wider GCC. Every unit shipped through Seven Star LLC carries full manufacturer warranty, factory calibration documentation, and access to regional technical support – a level of assurance that grey-market or third-party resale channels simply cannot back with genuine Endress+Hauser parts and firmware.

Operating Principle

The Liquisys COM223 measures dissolved oxygen concentration using amperometric sensing: the connected oxygen sensor generates a small current proportional to the partial pressure of oxygen diffusing across its membrane, and the transmitter’s electronics convert that current into a calibrated dissolved oxygen reading in mg/L or percent saturation. Because the measurement principle is electrochemical rather than optical, the sensor and transmitter combination is well suited to the biological and chemical variability found in aeration basins, surface water, and process water streams, where a stable, field-proven technology matters more than laboratory-grade resolution.

Rather than requiring a full multi-point calibration routine at every service interval, the COM223 supports simple single-point calibration together with continuous plausibility, process, and sensor checks that run in the background during normal operation. The practical consequence is a transmitter that flags a degrading membrane, a fouled sensor, or an out-of-range process condition automatically, reducing the chance that a plant operator discovers a failed dissolved oxygen loop only after an aeration basin has already drifted out of its control band.

Engineering Design of the Endress+Hauser COM223-DX0005

The Endress+Hauser COM223-DX0005 transmitter is housed in a compact 96mm × 96mm × 146mm panel-mount enclosure rated to IP54, sized to drop directly into a standard DIN panel cutout alongside other process instrumentation on a control panel face. A two-line display presents the primary measurement and diagnostic status without requiring a separate HMI, and the single-channel, four-wire configuration keeps wiring straightforward for a dedicated dissolved oxygen loop rather than a multi-parameter analyzer platform.

The Endress+Hauser COM223-DX0005 order code specifically configures the transmitter with a 230VAC power supply, a single 0/4–20mA output tied to the primary measured value, and OS41 software compatible with the COS4 and COS4HD amperometric sensor range in the base hardware/software version. Beyond this fixed configuration, the underlying COM223 platform supports HART, PROFIBUS DP, and PROFIBUS PA communication protocols and an automatic cleaning function using Chemoclean, triggered by alarm or limit switch, on hardware variants configured for that option – giving plant engineers a documented upgrade path within the same transmitter family if process requirements change after initial installation.

Key Features

The Endress+Hauser COM223-DX0005 delivers dependable dissolved oxygen monitoring in a compact panel-mount package. Its principal capabilities include:

• The Endress+Hauser COM223-DX0005 performs continuous amperometric dissolved oxygen measurement compatible with the COS4 and COS4HD sensor family via OS41 software.
• A compact 96mm × 96mm × 146mm IP54 panel-mount housing fits directly into a standard DIN control panel cutout alongside other plant instrumentation.
• Simple single-point calibration reduces routine maintenance effort compared with multi-point calibration procedures required by some competing transmitters.
• Continuous plausibility, process, and sensor checks run automatically in the background to flag a degrading sensor or an out-of-range condition before it affects control.
• The DX0005 configuration includes a 230VAC power supply and a dedicated 0/4–20mA primary-value output ready for direct control loop integration.
• The underlying COM223 platform supports HART, PROFIBUS DP, and PROFIBUS PA communication protocols for facilities standardizing on digital process buses.
• An automatic cleaning function using Chemoclean, triggered by alarm or limit switch, is available on appropriately configured hardware to reduce membrane fouling in demanding applications.
• A two-line display presents the primary measurement and diagnostic status directly on the transmitter without requiring a separate HMI or engineering workstation.

Industrial Applications

Municipal and industrial water treatment plants across Oman rely on the Endress+Hauser COM223-DX0005 transmitter for aeration basin oxygen control, where holding dissolved oxygen within a target control band directly affects treatment efficiency and blower energy consumption, as well as for drinking water monitoring, surface water quality tracking, and general process water treatment applications where a proven amperometric transmitter is preferred over emerging optical technology. Aquaculture and fish farming operations also depend on continuous dissolved oxygen monitoring from instruments in the COM223 family to protect stock health, since a dissolved oxygen excursion in a recirculating or pond system can cause rapid, costly losses if it goes undetected.

As the officially authorized partner for Endress+Hauser, Seven Star LLC distributes the Endress+Hauser COM223-DX0005 to utilities and industrial facilities throughout Muscat, the Sohar Industrial Port, the Salalah Free Zone, and water and wastewater treatment operations across the wider GCC. Regional instrumentation teams depend on Seven Star LLC not only for the initial COM223-DX0005 transmitter supply but for genuine replacement sensors, calibration solutions, and factory-backed technical support that keep dissolved oxygen control loops running reliably across a multi-site utility or industrial operation in Oman and neighboring GCC states.

Technical Specifications

The table below summarizes the principal specifications of the Endress+Hauser COM223-DX0005 dissolved oxygen transmitter.

Call To Action

Water and wastewater treatment engineers and procurement teams evaluating the Endress+Hauser COM223-DX0005 for an aeration control or general dissolved oxygen monitoring application are invited to submit a formal RFQ through Seven Star LLC’s instrumentation division. As the authorized partner for Endress+Hauser in Oman and the GCC, Seven Star LLC maintains regional warehouse stock, provides full technical datasheets on request, and coordinates factory-backed calibration and support directly with the manufacturer. Contact the Seven Star LLC instrumentation team today to confirm lead times, request the complete Endress+Hauser COM223-DX0005 datasheet, and place an order backed by genuine authorized-partner warranty coverage across Muscat, Sohar, Salalah, and the wider GCC region.