Hach LXV416.99.20001 LDO2 Dissolved Oxygen Sensor

Overview

The Hach LXV416.99.20001 is the LDO 2 sc luminescent dissolved oxygen sensor, part of Hach’s field-proven optical DO probe line built to eliminate the maintenance burden of traditional membrane and electrolyte-based Clark cell sensors. Instead of relying on a consumable membrane and electrolyte reservoir, the Hach LXV416.99.20001 measures dissolved oxygen through luminescence quenching, a solid-state optical method that requires no reagents, no membrane replacement, and virtually no routine calibration once the initial factory calibration is verified in the field.

With fast quotation turnaround and technical support, Seven Star LLC proudly supplies the LXV416.99.20001 LDO probe to municipal wastewater treatment plants, industrial effluent facilities, and aquaculture operations across the Sultanate. Every sensor supplied by Seven Star LLC comes with manufacturer documentation and technical support with SC controller integration.

Operating Principle

The Hach LXV416.99.20001 uses luminescent dissolved oxygen (LDO) technology. A blue LED inside the sensor cap excites a luminescent dye embedded in the sensor tip; the presence of oxygen molecules quenches this luminescence, shortening both the intensity and the decay time of the emitted light in direct, predictable proportion to the dissolved oxygen concentration in the sample. The sensor’s onboard electronics measure this luminescence decay time rather than a simple current, which makes the reading inherently immune to long-term optical drift, fouling-induced signal loss, and the calibration creep that plagues membrane-based DO probes over months of continuous immersion.

Because there is no membrane to puncture, no electrolyte to replenish, and no polarization warm-up period before a stable reading is available, the LXV416.99.20001 delivers fast, repeatable measurements immediately after installation or a cap change. The practical consequence for plant operators is a dramatic reduction in maintenance visits: a single sensor cap is rated for roughly two years of continuous service under typical municipal wastewater conditions, compared to the weekly or biweekly membrane changes required by legacy amperometric DO probes.

Engineering Design of the Hach LXV416.99.20001

The LXV416.99.20001 is built around a rugged, chemically resistant probe body designed for continuous submersion in aeration basins, clarifiers, and process tanks. The sensor cap — the only routinely replaceable component — snaps onto the probe body without tools and contains the luminescent dye layer, LED, and photodetector in a single sealed, field-serviceable assembly. This design keeps the electronics permanently protected from the process fluid while still allowing rapid cap exchange during scheduled maintenance.

Signal conditioning and digitization occur inside the probe itself using Hach’s digital sensor technology, so the LXV416.99.20001 communicates directly with an SC-series controller over a simple digital connection rather than analog current loop, eliminating cable-length-induced signal degradation. The probe ships with an integral 10-meter cable suited for direct-mount or flow-cell installation, and mounting hardware is available for both immersion in open tanks and insertion into flow-through sample lines.

Key Features

The Hach LXV416.99.20001 LDO2 dissolved oxygen sensor delivers low-maintenance, high-reliability DO monitoring for demanding water and wastewater applications:

• Measures dissolved oxygen using luminescence quenching, eliminating membranes and electrolyte solutions entirely.
• Provides calibration-free, drift-free operation once the factory-verified calibration is confirmed on site.
• Reduces maintenance intervals to roughly one sensor cap replacement every two years under typical conditions.
• Delivers stable readings immediately after cap change with no polarization warm-up delay.
• Communicates digitally with SC-series controllers for interference-free signal transmission over the cable run.
• Ships with a rugged 10-meter integral cable suitable for both immersion and flow-through mounting.
• Resists fouling-related signal loss better than membrane-based amperometric DO probes.
• Supports Class 1 Division 2 hazardous-area variants for use in classified wastewater treatment environments.

Industrial Applications

The LXV416.99.20001 is widely deployed in municipal wastewater treatment plants for aeration basin dissolved oxygen control, where accurate real-time DO readings directly govern blower energy consumption and nitrification performance. It is equally suited to industrial effluent treatment, aquaculture pond monitoring, and process water systems in food and beverage, pharmaceutical, and semiconductor facilities where dissolved oxygen levels influence product quality or corrosion control.

With engineering support in Muscat, Seven Star LLC supplies the LXV416.99.20001 to municipal utilities, EPC contractors, and industrial operators throughout Muscat, the Sohar and Salalah economic zones, and the wider Sultanate of Oman.Seven Star LLC supplies this item on request with the manufacturer documentation, and availability and lead time are confirmed at quotation.

Technical Specifications

The table below summarizes the key operating parameters of the Hach LXV416.99.20001 dissolved oxygen sensor:

Request a Quote for Hach LXV416.99.20001 LDO2 Dissolved Oxygen Sensor

Seven Star LLC supplies the Hach LXV416.99.20001 LDO2 dissolved oxygen sensor on request across Oman and the GCC, with lead time confirmed at quotation. Contact our instrumentation division for a formal RFQ, a technical datasheet download, or application engineering support for your wastewater or process water monitoring project. Seven Star LLC supplies the Hach LXV416.99.20001 with manufacturer documentation and local technical support.

Seven Star LLC supplies the Hach LXV416.99.20001 on request to municipal and industrial water treatment sites across Oman, with lead time confirmed at quotation.

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