254 nm UV absorbance measurement
Online UV254 organic matter analyzer
PUVCOD-900 Online UV254 COD Analyzer
A wide-range direct-immersion UV absorbance system for continuous organic-load and COD-correlation monitoring in wastewater, surface water and industrial discharge.
254 nm UV absorbance measurementDirect immersion without sampling or pretreatmentReagent-free continuous measurement
01
Verified product highlights
Direct immersion without sampling or pretreatment
Reagent-free continuous measurement
Automatic probe cleaning
Three optical-path range configurations
4–20 mA, relays and Modbus RS485
02
Verified technical specifications
- Measurement principle
- 254 nm UV absorbance (SAC254) with site-specific organic matter / COD correlation
- COD range - 2 mm path
- 0–2000 mg/L, calibrated with KHP
- COD range - 5 mm path
- 0–1000 mg/L, calibrated with KHP
- COD range - 50 mm path
- 0–90 mg/L, calibrated with KHP
- Accuracy
- ±5% with KHP standard solution
- Repeatability
- ±2% with KHP standard solution
- Resolution
- 0.01 mg/L
- Pressure rating
- ≤0.4 MPa
- Construction
- SUS316L standard; titanium-alloy seawater version; PUR cable
- Power supply
- 85–500 VAC or 9–36 VDC
- Outputs
- 3 × 4–20 mA; 3 configurable relays; Modbus RS485
- Operating temperature
- 0–45°C, non-freezing
- Probe dimensions
- Ø69 × 382 mm (2 mm); Ø69 × 385 mm (5 mm); Ø69 × 430 mm (50 mm)
- Protection
- Probe IP68 / NEMA6P; transmitter IP66 / NEMA4X
- Cable
- 10 m standard; extendable to 100 m
03
Typical applications
Municipal wastewater
Track organic-load trends through influent, process and outlet monitoring points.
Industrial discharge
Add reagent-free continuous COD correlation to industrial-water projects.
Surface water
Observe changes in dissolved organic matter and organic-load trends continuously.
Environmental stations
Integrate the sensor with remote panels and data-acquisition systems.
04
Build the correlation around the actual water matrix
UV254 is a continuous optical correlation, not a universal replacement for every digestion-based laboratory method. Confirm the water matrix, approved reference method, expected COD range, optical path, fouling and cleaning plan before ordering.
- 01Provide minimum, normal and peak COD
- 02State the laboratory reference method
- 03Confirm suspended solids, oil and window fouling
- 04Confirm mounting, cable, outputs and panel interface
05
Project documents
After the optical path and installation are confirmed, request the configured datasheet, installation arrangement, I/O schedule and quotation.
Share your project requirement- Configured technical datasheet→
- Optical-path and range confirmation→
- Installation and cable schedule→
- Project quotation→
Contact FUNEL
Tell us what you need to measure.
We will respond with a recommended configuration, supporting documentation and quotation.