AS-DO-20 Optical Dissolved Oxygen Sensor

Fluorescence-method dissolved oxygen sensor with three field-tuned variants for portable, fixed wastewater, and aquaculture deployment.

Request Quote Download Datasheet

Output & Integration

RS485 Modbus RTU

Overview

The AquaSense AS-DO-20 measures dissolved oxygen using fluorescence quenching of a sensing cap, eliminating membrane and electrolyte maintenance. Three optimized variants (A handheld, B fixed online, C aquaculture) cover the typical 0–20 mg/L range with stable long-term operation in clean and contaminated water alike.

Catalog Position

Series: AquaSense

Layer: Sensors

Key Features

Fluorescence-method optical DO measurement, no membrane or electrolyte
Three application-tuned variants: portable, fixed online, aquaculture
Long-term stable operation, low maintenance
Pressure and temperature compensation
RS-485 / Modbus RTU output

Applications

Aquaculture ponds and marine cages Surface water and reservoir monitoring Wastewater treatment monitoring Coastal and estuarine observation

Technical Specifications

Series	AquaSense
Layer	Sensor Layer
Product Family	Water Quality Sensors
Integration	RS485, Modbus RTU
Method	Fluorescence quenching
Measurement range	0–20 mg/L (variant dependent, up to 200% saturation)
Accuracy	±0.1–0.3 mg/L
Response time	Less than 60 s (A) / 120 s (B) / >120 s (C)
Operating temperature	0–40 °C (B) / 0–50 °C (A, C)
Power	9–24 VDC (12 VDC recommended)
Material	Composite plastic body
Dimensions	φ32 mm × 170 mm
Output	RS-485, Modbus RTU

Output & Integration

Zenocean products are specified for integration with marine stations, buoy telemetry, PLC cabinets, environmental monitoring networks, and cloud-connected data platforms.

Support for RS485, Modbus, NMEA, and system-specific protocols.
Optional power and signal configurations based on project architecture.
Mechanical and electrical coordination for outdoor and marine deployments.

FAQ

Can Zenocean products be integrated with third-party monitoring platforms?

Yes. Many Zenocean products are offered with RS485, Modbus, NMEA, or project-specific communication options, making them suitable for integration into third-party acquisition and software environments.

Can you help recommend a sensor model based on the application?

Yes. Buyers can share the application, required parameters, output signal, environment, quantity, and installation conditions, and Zenocean can recommend suitable models or a system configuration.

Are documents available for export and project quotation?

Yes. Product catalogs, datasheets, communication guidance, and selection support can be prepared for export-oriented B2B discussions and project submissions.

Cross Selection