ABB Endura AZ40 Oxygen and Carbon Monoxide Analyzer
Overview
The ABB Endura AZ40 is a close-coupled combustion analyzer that measures oxygen (O2) and carbon monoxide equivalent (COe) in a single system, giving operators the information needed to optimize combustion efficiency, detect burner malfunctions and improve plant safety. The close-coupled sample system keeps the sample at stable temperature and pressure for repeatable readings, with an integral flame arrestor that prevents flash-back if combustible levels exceed the lower explosive limit during startup, shutdown or process disturbance.
Engineering and Design
The AZ40 measures O2 with a response time to 63% of span of less than 3.5 seconds and COe in less than 13 seconds, with a COe range up to 20,000 ppm. Display accuracy is +/-2.5% of reading or +/-0.5% O2 for oxygen, and +/-20 ppm or +/-2% of selected span for COe up to 999 ppm. The sample path is maintained at high temperature to prevent acid-gas condensation and corrosion, and the system handles process temperatures from a minimum of 260 C (500 F) to a maximum of 1,649 C (3,000 F).
The analyzer supports thermocouple temperature input types B, E, J, K, N, R, S and T, and provides six normally-closed relay outputs plus two internal solenoid valves for AutoCal. Probe connections include RS485 communication and 115/230 V AC power, while the transmitter is rated IP66 / NEMA 4X with the probe rated IP55 / NEMA 4. Configuration, trending and firmware updates are handled through the onboard SD card
Key Features
- Measures oxygen and carbon monoxide equivalent (COe) in one close-coupled system
- Fast response: O2 t63 < 3.5 s, COe t63 < 13 s
- COe range up to 20,000 ppm for combustion optimization
- Integral flame arrestor prevents flash-back at high combustible levels
- Process temperature range 260 C to 1,649 C (500 F to 3,000 F)
- Heated sample path prevents acid-gas condensation and corrosion
- Six relays and two internal AutoCal solenoid valves
- Thermocouple input types B, E, J, K, N, R, S and T with internal cold junction handling
- IP66 / NEMA 4X transmitter with IP55 / NEMA 4 probe
- SD card for configuration backup, trending analysis and field firmware upgrade
Applications
Combustion optimization and emissions monitoring on boilers, furnaces and process heaters firing gas, oil or solid fuels, where oxygen plus combustibles measurement improves efficiency and identifies burner faults.
Specifications
| Measured variables | O2 and carbon monoxide equivalent (COe) |
| Measurement range | O2 0.01-100%; COe up to 20,000 ppm |
| Response time (t63) | O2 < 3.5 s; COe < 13 s |
| Display accuracy | O2 +/-2.5% of reading or +/-0.5% O2 (greater); COe +/-20 ppm or +/-2% (200-999 ppm), +/-400 ppm or +/-2% (1,000-20,000 ppm) |
| Process temperature | 260 C (500 F) minimum, 1,649 C (3,000 F) maximum |
| Thermocouple inputs | Types B, E, J, K, N, R, S and T |
| Probe connections | RS485 communication, 17 V DC, 115/230 V AC |
| Relay outputs | 6 x normally closed contacts |
| AutoCal | 2 internal solenoid valves |
| Enclosure | Transmitter IP66 / NEMA 4X; probe IP55 / NEMA 4 |
| Humidity | 0 to 95% |
Why Seven Star LLC
Seven Star LLC supplies ABB Endura analyzers, probes, filters and AutoCal accessories with verified factory specifications for combustion and emissions applications across Oman and the GCC.
Request a Quote for ABB Endura AZ40 Oxygen and Carbon Monoxide Analyzer
Send your fuel type, firing conditions and target emissions to our engineering team for a quotation. Use the Inquiry Form below – we confirm the AZ40 configuration, probe type and pricing for your project. | Inquiry Form
Technical Overview
The ABB Endura AZ40 is a combustion gas analyzer that measures both oxygen (O2) and carbon monoxide equivalent (COe) from a single probe assembly. Per ABB’s official datasheet, the O2 measurement uses the industry-standard zirconium oxide (zirconia) electrochemical cell, while the COe measurement uses a high-sensitivity catalytic sensor with metered dilution air added ahead of the sensor to ensure an adequate oxygen supply for accurate readings even during abnormal, low-oxygen combustion conditions. The O2 measurement range is adjustable from a minimum span of 0–5% up to a maximum span of 0–25%, with accuracy of ±2.5% of reading or ±0.5% O2 (whichever is greater) and a response time under 3.5 seconds to 63% of span. The COe measurement range is adjustable from a minimum span of 0–500 ppm up to a maximum of 0–20,000 ppm (2.00%), with accuracy of ±20 ppm or ±2% of span (whichever is greater) in the 200–999 ppm range, and ±400 ppm or ±2% of span in the 1,000–20,000 ppm range, with a response time under 13 seconds to 63% of span.
The AZ40 is rated for process temperatures from −46°C to +1,371°C (−50°F to +2,500°F), and provides 4 isolated analog outputs (0–22 mA, programmable), 6 digital relay outputs (normally closed, rated 2 A at 230 VAC), 4 digital inputs (volt-free contacts), Modbus communication, and SD-card data logging for trend recording and diagnostics. The unit includes integral flame arrestors, a heated sample path, and automatic sensor calibration to maintain measurement accuracy with minimal manual intervention. Seven Star LLC notes that the manufacturer’s datasheet confirms CE marking and cFMus certification for ordinary (non-hazardous) locations; ATEX/IECEx hazardous-area certification status for this specific model was not confirmed during this review, and customers requiring a certified hazardous-area variant should confirm availability directly with Seven Star LLC before ordering.
Applications
The AZ40 is used for continuous combustion and flue gas monitoring to determine excess oxygen levels, identify burner malfunctions, improve combustion efficiency, and enhance plant safety in boilers and furnaces across power generation, refining, and industrial process heating applications.
Why Seven Star LLC
Seven Star LLC supplies genuine ABB Endura AZ40 combustion gas analyzers to customers across Oman and the GCC, and helps confirm output configuration, communications protocol, and hazardous-area certification requirements for a specific installation before order confirmation.
Request a Quote for ABB Endura AZ40 Oxygen and Carbon Monoxide Analyzer
Contact Seven Star LLC to request a quotation for the ABB Endura AZ40 oxygen and carbon monoxide analyzer. Our team can help confirm the correct configuration for your combustion monitoring application, and support reliable delivery across Oman and the wider GCC region.
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ABB is one of the world’s leading technology companies in electrification and automation, recognized for its commitment to innovation, reliability, and energy efficiency. With a history spanning more than a century, ABB delivers high-performance products and systems that help industries operate more intelligently and sustainably.
The company’s expertise covers a wide range of fields including power distribution, process automation, robotics, motion control, and digital solutions for smart manufacturing. ABB’s products are designed to enhance productivity, safety, and operational efficiency while reducing energy consumption and environmental impact.
Seven Star LLC supplies a complete selection of genuine ABB products, including industrial drives, PLCs, contactors, sensors, relays, and automation components, serving clients across oil & gas, energy, marine, and manufacturing sectors.
By combining ABB’s advanced engineering with Seven Star LLC’s trusted sourcing and support, customers gain access to reliable, future-ready industrial solutions built to meet the most demanding standards of modern industries.
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