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.
As the official authorized partner and exclusive regional representative for Hach in Oman and the GCC, 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 shipped from our Muscat-based inventory carries full manufacturer warranty and is backed by local commissioning and SC controller integration support that grey-market imports cannot provide.
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 an 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.
As the officially authorized partner for Hach in Oman and the GCC, Seven Star LLC distributes 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. Our authorized status ensures that every sensor is genuine Hach factory stock, fully compatible with existing SC-series controller networks, and supported by regional application engineering for aeration control optimization.
Technical Specifications
The table below summarizes the key operating parameters of the Hach LXV416.99.20001 dissolved oxygen sensor:
| Parameter | Specification |
|---|---|
| Model | Hach LXV416.99.20001 (LDO 2 sc) |
| Measured Parameter | Dissolved Oxygen |
| Measurement Technology | Optical luminescence quenching (LDO) |
| Calibration | Factory calibrated, drift-free, no field recalibration typically required |
| Maintenance | No membrane or electrolyte changes; periodic sensor cap replacement only |
| Cable Length | 10 meters, integral |
| Compatible Controllers | Hach SC-series digital controllers |
| Typical Cap Life | Approximately 2 years under continuous service |
| Mounting Options | Immersion or flow-through |
| Area Classification | General purpose and Class 1 Division 2 variants available |
Request a Quote for Hach LXV416.99.20001 LDO2 Dissolved Oxygen Sensor
Seven Star LLC maintains regional warehouse stock of the Hach LXV416.99.20001 LDO2 dissolved oxygen sensor for immediate dispatch across Oman and the GCC. Contact our instrumentation division for a formal RFQ, a technical datasheet download, or application engineering support for your wastewater or process water monitoring project. As the authorized partner for Hach in Oman and the GCC, Seven Star LLC guarantees genuine factory stock, full manufacturer warranty, and local technical support that unauthorized resellers cannot offer.
Seven Star LLC keeps the Hach LXV416.99.20001 in regional stock across Oman for same-week dispatch to municipal and industrial water treatment sites.
Related Products
Hach is a global leader in water quality analysis and laboratory instrumentation, providing reliable solutions for monitoring and improving water and wastewater processes. Founded in 1947, Hach has built a strong reputation for accuracy, innovation, and ease of use in analytical measurement.
Its comprehensive product range includes spectrophotometers, turbidity meters, pH and conductivity sensors, online analyzers, and reagent kits designed for precise measurement and regulatory compliance. Hach instruments are widely used in municipal water treatment, environmental monitoring, industrial process control, and laboratory applications.
Seven Star LLC supplies authentic Hach analytical instruments and sensors to clients across the Middle East, offering dependable water analysis solutions backed by proven global expertise and local technical support.
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