Dissolved Oxygen Analyser

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The next-generation LDO (Luminescent Dissolved Oxygen) Probe sets a new benchmark in DO measurement with its calibration-free, maintenance-light design. Thanks to a factory-performed, high-precision 3D calibration, the probe delivers unmatched stability and accuracy over its full service life — right out of the box. Designed with optical luminescence technology, this probe eliminates the need for membranes and electrolytes, dramatically reducing routine maintenance. Customizable diagnostic alerts ensure cleaning cycles are never missed, while an optimized body design delivers faster temperature response. Fully compatible with Claros, Hach’s Water Intelligence System, this sensor supports seamless data integration, remote monitoring, and enhanced process control across water and wastewater applications.

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No calibration required for the full 2-year life of the sensor cap

Luminescent optical technology – no membranes, no electrolyte, no drift

Maintenance-free operation with minimal user intervention

Prognosys predictive diagnostics for proactive maintenance planning

Faster temperature response thanks to optimized sensor design

Claros Enabled – integrate seamlessly with Hach’s smart water platform

Ideal for immersion or flow-through applications

Unaffected by interferences such as pH, H2S, surfactants, or ions

Backed by a 3-year probe warranty and 2-year sensor cap warranty

Measurement Range: 0.01 – 20.00 mg/L (0 – 200% saturation)

Accuracy: ±0.1 ppm (below 5 ppm), ±0.2 ppm (above 5 ppm)

Temperature Accuracy: ±0.2 °C

Operating Temperature: 0 – 50 °C (sensor), -20 – 70 °C (storage)

pH Range: 0 – 12

Pressure Range: Max. 3.5 bar

Response Time: T90 < 40 s, T95 < 60 s

Body Material: CPVC, Polyurethane, FKM/FPM, Noryl, 316L Stainless Steel

Sensor Cap: Acrylic

Protection Class: IP68

Dimensions: Ø 48.25 mm × 254 mm

Weight: 1.0 kg (probe only)

Cable Length: 10 m (up to 100 m with extension cable)

Thread Size: 1" NPT

Communication: Modbus via SC4500, SC1000, SC200 controllers

Certification: ETL listed for Class I, Div. 2 hazardous locations

Included: Sensor with 10 m cable, calibration bags, and manual

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Dissolved Oxygen Analyser

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