Description
Honeywell SDW-550EC – Electrochemical Sensor Element for Fixed Toxic Gas Detection
The Honeywell SDW-550EC is understood to be an electrochemical (EC) sensing element intended for fixed-point gas detection setups, typically used for toxic gases in industrial environments. From my experience, EC sensing is the go-to when you want dependable accuracy at low ppm levels and a stable baseline over long periods. You might notice that plants choose this style of sensor for areas like compressor stations, battery rooms, cold-storage facilities (ammonia), or wastewater treatment—places where continuous monitoring really matters.
One thing I appreciate is how EC modules like this integrate with a host transmitter or controller: you swap the sensor, run a quick calibration, and get back to operation with minimal downtime. It’s a practical approach for maintenance teams who need a predictable, clean change-out rather than a full instrument replacement. While exact pairings vary by site standard, the SDW-550EC typically fits into a Honeywell fixed detection architecture where the transmitter provides power, signal conditioning, and outputs to your DCS or fire & gas panel.
Order Placement Process and Guarantees
- Warranty: 365 days
- Delivery: 1 week when in stock; no more than one month at the latest
- Payment: 50% advance payment, full payment prior to delivery
- Express options: FedEx, UPS, DHL
Key Features
- Electrochemical (EC) sensing – Typically used for low-ppm toxic gas monitoring with strong selectivity and low drift.
- Service-friendly module design – Swap the sensor in minutes; perform span/zero to return to service quickly.
- Stable performance in industrial settings – In many cases, EC cells provide predictable response and good repeatability when installed away from solvents and silicone vapors.
- Integrates with a host transmitter – Sensor element is powered and conditioned by the matched Honeywell transmitter/controller used on site.
- Supports routine calibration programs – Compatible with common calibration gases and bump test workflows.
Technical Specifications
| Brand / Model | Honeywell SDW-550EC |
| HS Code | 9027.10 (Gas or smoke analysis apparatus) |
| Power Requirements | Powered via host transmitter/controller (no direct supply to sensor element) |
| Signal Input/Output Types | Electrochemical cell signal to host; system outputs (e.g., 4–20 mA, relays, RS‑485) are provided by the paired transmitter |
| Operating Temperature | Typically -20 to +50 °C, gas-dependent; follow the matched transmitter/sensor datasheet |
| Dimensions & Weight | Compact, cartridge-style sensor element (module form factor; low mass) |
| Communication Interfaces | Provided by host transmitter (commonly 4–20 mA analog and/or RS‑485 Modbus on compatible Honeywell units) |
| Installation Method | Installs into the designated fixed gas detector/transmitter as a replaceable EC sensor; mount location depends on target gas and enclosure |
Note: Specific gas range, response time, and calibration details are determined by the configured target gas and the host transmitter model. If you share your gas and setpoint requirements, we can match the exact variant.
Related or Supporting Products
- Honeywell XNX Universal Transmitter – Multi-protocol transmitter platform; accepts a range of sensing technologies and provides 4–20 mA and digital comms on supported versions.
- Honeywell Touchpoint Plus (TPPL) Controller – Centralized gas controller for up to multiple channels; ideal when you want relays, horn/strobe control, and easy alarm configuration.
- Honeywell Sensepoint XCD (toxic variants) – Widely used fixed transmitter family for toxic gases; pairs with EC sensors and outputs 4–20 mA (plus optional digital).
- Calibration Kits & Bump-Test Stations – Portable cylinders, regulators, and docking solutions to standardize routine bump tests and calibrations.
Installation & Maintenance
- Mounting environment – Install the host detector in a ventilated location that represents breathing-zone conditions for the target gas. For heavier-than-air gases, mount lower; for lighter-than-air, mount higher.
- Cabinet and wiring – Use a sealed industrial enclosure rated for the area (IP rating or hazardous-area approvals as required). Run shielded cables for analog/digital outputs, grounded at one end to reduce noise.
- Sensor handling – Avoid exposure to silicone, solvent vapors, or strong oxidizers during installation; these can poison EC sensors in many cases.
- Calibration – Zero and span after sensor replacement. Routine bump tests are typically weekly to monthly; full calibrations are commonly monthly to quarterly depending on site policy and risk level.
- Firmware and logging – If using a smart transmitter, keep firmware current and periodically export event logs to verify stability and alarm history.
- Spare strategy – Keep at least one spare EC sensor per gas type on site to minimize downtime; store sealed per manufacturer guidance.
Quality & Certifications
- Certifications – CE-marked and RoHS-compliant are typical for Honeywell fixed detection components. Hazardous-area approvals (e.g., ATEX/IECEx) apply at the complete detector/transmitter assembly level; confirm against the exact host model.
- Manufacturer’s warranty – 12 months coverage as stated above; warranty for EC cells may be gas-specific.
From my experience, most teams choose EC sensors like the SDW-550EC when they want dependable low-level detection with low upkeep. If you can share the target gas, range, and the host transmitter you’re using, we’ll validate compatibility and quote the right sensor variant with the quickest ship date.
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