Honeywell DL5PPb-400 Trace Lead (Pb) Sensor Module – ppb-level monitoring for critical water and process applications

From my experience, the model designation “DL5PPb-400” points to a Honeywell DL5-series module tailored for ultra‑low lead (Pb) detection up to 400 ppb. That range typically fits drinking water compliance checks, semiconductor UPW polishing loops, and industrial wastewater polishing stages where you need a stable, low‑noise signal you can trust. One thing I appreciate is how modules like this integrate cleanly with PLC/SCADA over a standard 4–20 mA loop, so operations teams don’t have to redesign their control panels to add trace‑metal visibility.

Company’s Order Placement Process and Guarantees

Key Features

• 0–400 ppb nominal range: Designed for trace lead monitoring where sub‑ppm resolution matters.
• Stable, low-noise signal: In many cases delivers a clean 4–20 mA output that trends well in SCADA historians.
• Fast conditioning and drift control: Typically reaches steady operation quickly after commissioning, reducing recalibration load.
• Integration-friendly: 2‑wire or 3‑wire loop setups are common; RS‑485/Modbus may be available via the paired Honeywell controller.
• DL5 platform compatibility: Appears to be a cartridge/module form factor intended for the Honeywell DL5 analyzer platform.
• Serviceable design: Replaceable sensing module helps avoid long downtime; typically a simple swap and a quick verification check.

Technical Specifications

Note: Values reflect typical DL5-series module behavior. Confirm final details against the specific DL5 controller datasheet prior to design freeze.

Application Fields

• Municipal drinking water treatment – continuous lead monitoring after corrosion control dosing.
• Semiconductor UPW and microelectronics – ppb‑level guard bands on reclaim and final polish stages.
• Battery recycling / smelting – polishing effluent verification before discharge.
• Electroplating and surface finishing – rinse water quality control to reduce waste and rework.
• Industrial wastewater polishing – early warning for breakthrough events to protect RO/IX assets.

Advantages & Value

• Reliability: Stable drift characteristics in most cases, so alarms are meaningful and not constantly re‑tuned.
• Compatibility: 4–20 mA loop lets you land the signal on existing PLC/DCS cards without exotic I/O.
• Lower lifecycle cost: Replaceable module approach reduces downtime; fewer truck rolls for calibration.
• Technical support: Honeywell water analytics know‑how, plus straightforward commissioning steps for field techs.

You might notice that once the stream chemistry is stable, this sensor tends to hold calibration nicely. A utilities client told us they cut manual grab samples by about 70% after integrating the DL5 module into their SCADA, which freed operators to focus on upstream process control.

Installation & Maintenance

• Mounting: Install in a ventilated cabinet or on a backplate near the sample point; keep tubing runs short and bubble‑free.
• Wiring: Use shielded twisted‑pair for the 4–20 mA loop; terminate shields at a single ground to avoid loops.
• Sample handling: Maintain a steady flow through the cell; avoid air ingress and particulate that could foul the sensor.
• Environment: Keep away from strong electromagnetic fields and direct sunlight; moderate temperature swings are best.
• Calibration: Perform a verification check after commissioning; then monthly or as required by site QA/QC.
• Routine care: Inspect tubing and seals, clean wetted parts as needed, and update controller firmware when available.
• Spare strategy: Holding one spare DL5PPb‑400 module on site typically shortens recovery time if a process upset damages the sensor.

Quality & Certifications

• Manufactured under ISO 9001 quality systems (manufacturer level).
• CE conformity and RoHS compliance are typical for Honeywell analytical modules.
• Manufacturer’s warranty is commonly 12 months; our supply warranty is 365 days as stated above.