Introduction
This industrial-grade chlorophyll sensor based on the fluorescence principle. The probe and housing are integrated into a single unit, resulting in a simple and convenient design. It is used for accurately measuring chlorophyll concentration in water, with a measurement range of 0-400 μg/L, a resolution of 0.1 μg/L, and an accuracy of ±5% FS. The sensor outputs relative fluorescence intensity data, facilitating analysis of the relationship between fluorescence intensity and chlorophyll concentration based on actual conditions. It utilizes a fiber optic light transmission design and incorporates internal filtering algorithms, providing strong resistance to external light interference.
The chlorophyll sensor is equipped with an RS485 communication interface, supporting the standard ModBus-RTU protocol. Tutorials are provided for connecting the sensor to Arduino development boards and DFRobot LoRaWAN, allowing for quick setup of a test environment and real-time data monitoring. A built-in temperature sensor provides automatic temperature compensation, ensuring accurate and reliable data output under varying environmental conditions.
The chlorophyll sensor undergoes rigorous calibration before leaving the factory and is ready for use upon arrival, requiring no further calibration. With an overall waterproof rating of IP68, it can be submerged in water for extended periods, making it suitable for algal research and monitoring in rivers, lakes, and ponds.
Features
Measurement range: 0~400 μg/L, resolution: 0.1 μg/L, accuracy: ±5% FS
Integrated probe housing design, waterproof rating up to IP68
Fluorescence principle with filtering algorithm, strong resistance to external light interference
Built-in temperature sensor, automatic temperature compensation to ensure measurement accuracy
RS485 communication interface, supports ModBus-RTU protocol
Applications
Freshwater Algal Bloom Early Warning System: Deploy the sensor in a lake or reservoir connected via RS485 to a shore-side data logger. Continuous chlorophyll tracking enables early detection of cyanobacteria blooms before they become visible — critical for drinking-water utilities and environmental agencies.
Aquaculture Pond Health Monitoring: In shrimp or fish farming operations, chlorophyll spikes correlate with phytoplankton overgrowth that depletes dissolved oxygen overnight. Pairing this sensor with a DFRobot LoRaWAN gateway enables remote, real-time alerts — reducing fish mortality without manual sampling runs.
University & STEM Field Lab: Environmental science courses require students to collect real water-quality data. The sensor's plug-and-read design (no calibration needed) and Arduino-compatible RS485 interface allow students to focus on data analysis rather than instrument setup. A single afternoon is enough to build a working field station.
River & Watershed Long-Term Research: Multi-site longitudinal studies demand sensors that survive months of continuous submersion. The IP68 / 0.6 MPa-rated corrosion-resistant housing and automatic temperature compensation ensure data consistency across wet and dry seasons without site visits for recalibration.
Specification
Power Supply Voltage: 10~30V DC
Power Consumption: 0.4W
Communication Interface: RS485 (Standard ModBus-RTU protocol)
Measurement Range:
Chlorophyll: 0~400 μg/L
Fluorescence Intensity: 0~100 RFU
Temperature: 0°C~+60°C
Measurement Accuracy:
Chlorophyll: ±5%FS (25℃)
Fluorescence Intensity: ±5%FS (25℃)
Temperature: ±0.5°C
Resolution:
Chlorophyll: 0.1 μg/L
Fluorescence Intensity: 0.1 RFU
Temperature: 0.1°C
Temperature Compensation Range: 0°C~+60°C
Response Time: ≤30S
Operating Temperature: 0°C~+40°C
Measurement Principle: Fluorescence method
Waterproof Rating: IP68
Pressure Resistance: 0.6MPa
Cable Length: 5m
Housing Material: Corrosion-resistant plastic
Shipping List
RS485 Water Quality Chlorophyll Sensor x1
5m sensor cable x1
