Chlorophyll-a fluorescence measurement for assessing algal abundance in water
Fluorescence chlorophyll analyzer · PCH-800A
Online Chlorophyll-a Analyzer
A reagent-free fluorescence sensor for continuous chlorophyll-a measurement. Selection must consider spatial variation in algae and the documented turbidity condition below 50 NTU.
0–500 µg/L0.01 µg/LTurbidity <50 NTU
Values checked item by item against the PCH-800A source
Range, accuracy wording, turbidity condition, construction, dimensions and interfaces are stored separately. The black transmitter image is the approved FUNEL export presentation; final configuration remains subject to project confirmation.
01
Measurement principle and product highlights
No reagent or sample pretreatment is required for rapid continuous measurement
Digital sensor output supports long-distance transmission and project integration
Plug-and-play field installation with reverse-polarity protection for sensor power and RS485 wiring
Three 4–20 mA outputs, three configurable relays and Modbus RS485
Time display, data storage, historical-data review and optional wireless transmission
02
Verified technical specifications
Before quotation, provide the monitoring objective, water matrix, expected chlorophyll range, normal and peak turbidity, number of monitoring points, pressure, material, mounting, cable, power, outputs and destination.
- Measurement principle
- Chlorophyll-a fluorescence
- Measurement range
- 0–500 µg/L
- Accuracy
- ±5% of the signal level corresponding to a 1 ppb rhodamine B sample
- Repeatability
- ±3%
- Resolution
- 0.01 µg/L
- Pressure rating
- ≤0.4 MPa
- Calibration
- Offset calibration; slope calibration
- Water-condition note
- Chlorophyll may be non-uniformly distributed; multipoint monitoring is recommended; turbidity <50 NTU
- Sensor construction
- SUS316L standard version; titanium-alloy seawater version; POM end covers; PUR cable
- Power supply
- 85–500 VAC; 9–36 VDC
- Analog output
- 3 × 4–20 mA
- Relays
- 3 configurable relays
- Digital communication
- Modbus RS485
- Storage temperature
- -15–50°C
- Operating temperature
- 0–45°C, non-freezing
- Sensor dimensions
- Ø30 × 223 mm
- Transmitter dimensions
- 145 × 125 × 162 mm
- Sensor weight
- 0.55 kg
- Transmitter weight
- 1.35 kg
- Sensor protection
- IP68 / NEMA6P
- Transmitter protection
- IP66 / NEMA4X
- Cable
- 10 m standard; extendable to 100 m
03
Source-supported applications
Water-source monitoring
Track chlorophyll trends at raw-water sources and water-plant intakes.
Aquaculture
Observe algal abundance in ponds, recirculating systems and aquaculture water.
Surface and landscape water
Add continuous chlorophyll measurement to lakes, rivers and managed landscape water.
Seawater projects
Use the documented titanium-alloy construction option when seawater compatibility is required.
04
Items to confirm
Online chlorophyll selection requires more than a range: turbidity, spatial distribution, point count and the actual water matrix must also be confirmed.
- 01Monitoring objective, water matrix and expected algal change
- 02Minimum, normal and peak chlorophyll plus turbidity
- 03Stratification, representativeness and number of monitoring points
- 04Pressure, standard or seawater material, mounting and maintenance access
- 05Cable, power, 4–20 mA, relays and Modbus RS485
05
Project documents available on request
Based on the water body, range, turbidity, material and point requirements, we provide a configured datasheet, point and mounting confirmation, I/O schedule and project quotation with the supply scope itemized.
Get a quote- Configured datasheet→
- Point and mounting confirmation→
- Cable and I/O schedule→
- Project quotation→
06
Selection questions
Does PCH-800A require reagents?+
The supplied sheet describes fluorescence chlorophyll measurement without reagents or sample pretreatment.
Why does the source require turbidity below 50 NTU?+
This is the documented water-condition limit. Higher-turbidity samples require project review and cannot automatically use the standard condition.
Why is accuracy referenced to rhodamine B signal?+
The source expresses accuracy against the signal level of a 1 ppb rhodamine B sample. The page preserves that wording rather than converting it into an unsupported percentage of reading.
Can the website image replace a technical drawing?+
No. The clean image is for public presentation. Sensor dimensions, transmitter dimensions and mounting remain controlled by the datasheet and order confirmation.
Contact FUNEL
Tell us what you need to measure.
We will respond with a recommended configuration, supporting documentation and quotation.