ABB AHM550 – Hydrazine Analyzer – Navigator

Overview

The ABB AHM550 hydrazine analyzer continuously measures hydrazine in high-purity water so you can control scavenger dosing precisely—avoiding both under-dosing (corrosion risk) and over-dosing (chemical waste). The analyzer’s architecture separates the Navigator 550 hydrazine wet-section from the Navigator 540 transmitter, reducing footprint and allowing multi-stream builds where one transmitter trends up to four wet-sections (same or mixed parameters from the Navigator 500 range). Maintenance is simplified with buffered chemistry and temperature compensation within the wet-section; the transmitter provides local trending, audit logs and data export.

ABB AHM550 DataSheet

Key Features & Specs

• Continuous hydrazine measurement for boiler feedwater/condensate; optimized for power cycle chemistry. 

• Modular design: ABB AHM550 wet-section + AWT540 transmitter; up to 4 wet-sections per transmitter for multi-point monitoring. 

• Electrochemical measurement with automatic pH buffering and temperature compensation for accuracy and stability. 

• Communications & I/O (AWT540): options for Modbus/Profibus/Ethernet; transmitter can add current outputs + relays and on-board data storage (per build). 

• Low maintenance wet-section; simplified periodic reagent/consumable service. 

• Local color display & trending on the transmitter; export logs for QA/compliance. 

Typical Applications

• Power generation: boiler feedwater & condensate hydrazine control

• Industrial high-purity water loops using oxygen scavengers

• Deaerator outlet monitoring & chemical optimization 

What’s Included / Ordering Notes

• AHM550 hydrazine wet-section (wall/panel mount, with plumbing kit per ABB options)

• AWT540 transmitter (order codes vary by mount, supply, and comms/I/O card)

• Reagents/consumables ordered per ABB kit codes; consult the datasheet for ranges, flow and ambient limits. 

Installation & Maintenance

• Mount wet-section near sample point; maintain ABB-specified sample flow, temperature and pressure.

• Provide clean, conditioned sample (per datasheet), route waste safely.

• Schedule routine checks: reagents, tubing, zero/span verification; log alarms/trends via AWT540. 

Compliance & Integration

• Designed for boiler water service and DCS integration via AWT540 comms (Modbus/Profibus/Ethernet options). Verify your plant protocol and I/O card selection at order time. 

FAQ

Q: Why choose ABB AHM550 over grab sampling?

A: Real-time control avoids delayed corrections—reducing corrosion risk and chemical waste. 

Q: Can one transmitter handle multiple points?

A: Yes. An AWT540 can display/log up to 4 wet-sections (multi-stream). 

Q: What communications are available?

A: The AWT540 supports Modbus/Profibus/Ethernet options and additional current outputs/relays depending on build. 

Q: Is maintenance complex?

A: No—wet-section design simplifies reagent handling; transmitter offers on-screen prompts and data export for audits. 

Call to Action

Need the right build? Send your boiler pressure/temperature, expected hydrazine range, sample conditions, and preferred comms (Modbus/Profibus/Ethernet). Seven Star LLC will validate configuration, availability, and pricing—then ship a ready-to-commission kit.