Zenocean

AquaSense-DO

Fluorescence-lifetime optical dissolved oxygen sensor with long-life sensing cap, no oxygen consumption, and low maintenance for continuous water-quality monitoring.

AquaSense-DO uses fluorescence-lifetime technology, where dissolved oxygen quenches an excited luminophore on the sensor cap. Because the optical method consumes no oxygen, the probe has no flow-rate dependence, requires no warm-up time, and avoids the electrolytes and frequent calibration of traditional membrane-style DO sensors.

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AquaSense-DO optical dissolved oxygen sensor

Fluorescence Lifetime

No oxygen consumption, no flow-rate restriction, no warm-up required.

Low Maintenance

Reagent-free and electrolyte-free design simplifies long-term deployment.

Stable & Fast

Optimised optical path delivers stable readings with fast response.

RS485 + Modbus

Digital RS485 output with Modbus RTU for direct system integration.

Modulated Fluorescence

Modulated excitation and coherent detection lift sensitivity and rejection.

No Reagents

Reagent-free measurement keeps the unit clean and environmentally friendly.

Self-Cleaning Wiper

Built-in cleaning device protects long-term stability against biofouling.

RS485 + Modbus

Digital RS485 output with Modbus RTU for logger and PLC integration.

Continuous Monitoring

Designed for unattended in-situ deployments on buoys and stations.

Stable & Sensitive

Optimised optics deliver low detection limits with low drift.

Overview Specifications Parameters Resources Accessories Support

AquaSense-DO Overview

AquaSense-DO is a fluorescence-lifetime optical dissolved oxygen sensor. The method relies on the dynamic quenching of an excited luminophore by oxygen, so the measurement does not consume oxygen and is independent of sample flow rate. The sensor needs no warm-up and no electrolyte, and is designed to deliver accurate, stable, fast, and convenient dissolved-oxygen data with minimal user intervention.

The sensor is offered in multiple configurations to match different deployment scenarios — from clean surface water and aquaculture ponds to municipal and industrial process water — and can be paired with the AquaGo handheld analyzers or integrated into AquaSense-Multi multi-parameter sondes for fixed-station and buoy use.

AquaSense-DO Product Image

AquaSense-DO optical dissolved oxygen sensor
Primary view of the AquaSense-DO optical dissolved oxygen sensor.

AquaSense-DO Key Specifications

Parameter
Value
Measurement Principle
Fluorescence lifetime (optical)
Reagent-free, no oxygen consumption
DO Range
0 to 20 mg/L
Standard configuration
DO Resolution
0.01 mg/L
Output resolution
DO Accuracy
±0.2 mg/L (0-8 mg/L) / ±0.3 mg/L (8-20 mg/L)
After calibration
Saturation Range
0 to 200% saturation
Calculated output
Temperature Range
0 to 50 °C
Water temperature
Temperature Accuracy
±0.2 °C
Built-in NTC element
Response Time
T90 < 30 s
Typical at 25 °C
Output
RS485, Modbus RTU
Default digital interface
Power Supply
DC 9-24 V
Low-power operation
Ingress Protection
IP68
Submersible body
Cable Length
10 m standard, customisable
Submersible cable
Sensing Cap Life
≥ 24 months
Typical, replaceable cap
Calibration
Air / zero / two-point
Field-friendly workflow
Housing Material
POM / 316L stainless steel optional
Wetted parts
View Full Specifications

AquaSense-DO Supported Parameters

Measured Parameters

Dissolved Oxygen (mg/L) Oxygen Saturation (%) Water Temperature

Output Options

RS485 Modbus RTU

Power Options

DC 9-24 V

Environmental

0-50 °C IP68 Submersible 10 m standard cable

AquaSense-DO Resources and Downloads

Product Datasheet

Specifications, configurations, and deployment ratings for project planning.

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Integration Guide

Wiring, protocol notes, and mounting guidance for platform integrators.

Email Support

Calibration & Maintenance

Recommended verification, calibration, and servicing workflow.

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AquaSense-DO Accessories

Calibration Solutions

Standard buffer and reference solutions for routine calibration.

Cable & Junction Box

Submersible cabling and weatherproof junction options for field wiring.

Mounting Hardware

Probe guards, flow cells, and pole or buoy mounting adapters.

AquaSense-DO Support and Deployment Guidance

Wiring and protocol assistance for RS485 / Modbus RTU integration.

Integration support for sondes, buoys, fixed stations, and process panels.

Calibration, field-verification, and long-term maintenance planning.

Application support for freshwater, brackish, marine, and industrial deployments.

AquaSense-DO Frequently Asked Questions

What is AquaSense-DO?

AquaSense-DO is fluorescence-lifetime optical dissolved oxygen sensor with long-life sensing cap, no oxygen consumption, and low maintenance for continuous water-quality monitoring. AquaSense-DO uses fluorescence-lifetime technology, where dissolved oxygen quenches an excited luminophore on the sensor cap. Because the optical method consumes no oxygen, the probe has no flow-rate dependence, requires no warm-up time, and avoids the electrolytes and frequent calibration of traditional membrane-style DO sensors.

What parameters does AquaSense-DO support?

AquaSense-DO supports Dissolved Oxygen (mg/L), Oxygen Saturation (%), Water Temperature, RS485, Modbus RTU, DC 9-24 V, 0-50 °C, IP68, and other configured parameters.

Where is AquaSense-DO typically used?

AquaSense-DO is typically used for Surface water, groundwater, and reservoir monitoring, Aquaculture farms and hatcheries, Municipal water supply and wastewater treatment, Environmental compliance and pollution control.

What systems work with AquaSense-DO?

AquaSense-DO can be configured with AquaSense-Multi Multi-Parameter Sonde, OceanStations, CoreLink Telemetry and related Zenocean monitoring platforms or telemetry systems.

What support is available for AquaSense-DO?

Zenocean provides configuration, integration, deployment and maintenance guidance for AquaSense-DO projects.

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Used by researchers, engineers, and operators worldwide.

Built for Water

Designed for reliable freshwater, brackish, and marine service.

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