SZ551-B
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- CE & EMC Certified
- 12-Month Warranty
- Reply Within 12 Hours
Environmental & Water Quality Sensors
SZ551-BWater Monitoring
UV254 COD Sensor
Digital UV254 COD sensor measures COD, TOC, turbidity, and temperature in water using direct UV254 spectral absorption. COD range 0–500 mg/L or 0–1500 mg/L by model, TOC range 0–180 mg/L or 0–600 mg/L, accuracy ±5%, with RS-485 Modbus output and integrated turbidity compensation. Suitable for continuous monitoring of source water, surface water, municipal and industrial wastewaters.
- COD Accuracy
- ±5%
- COD Range
- 0–500 mg/L or 0–1500 mg/L by model
- Output
- RS-485, Modbus protocol
- Power Supply
- DC 12–24 V, ≥1 A; 0.25 W (brush not rotating), 0.8 W or 2 W (brush rotating, by model)
- Digital sensors, digital RS-485 output, Modbus protocol
- No chemicals, direct UV254 spectral absorption measurement
- Proven UVC LED technology, long lifetime, stable and instant measurement
- Measurement of parameters such as COD, TOC, turbidity and temperature
- Integrated turbidity compensation and rugged design
- Self-cleaning brushes prevent biological adhesion and extend maintenance intervals
Specifications
SZ551-B technical data
| Parameter | Value |
|---|---|
| COD Range | 0–500 mg/L or 0–1500 mg/L by model |
| COD Accuracy | ±5% |
| COD Resolution | 0.01 mg/L |
| TOC Range | 0–180 mg/L or 0–600 mg/L by model |
| Temperature Range | 0–50 ℃ |
| Output | RS-485, Modbus protocol |
| Power Supply | DC 12–24 V, ≥1 A; 0.25 W (brush not rotating), 0.8 W or 2 W (brush rotating, by model) |
| Body Material | 316L (custom titanium available) |
| Size | Φ50 mm × 179 mm |
| Cable Length | 10 m (default), customizable |
| IP Rating | IP68 |
| Maximum Pressure | 3 bar |
Applications
Where the SZ551-B is used
Water quality
Aquaculture
Smart agriculture
Weather stations
Environmental monitoring
Ordering
Terms & how ordering works
- MOQ
- 1 pc (flexible, no minimum for most products)
- Lead time
- 2-3 days for in-stock items, 15-30 days for custom orders
- Warranty
- 12-month warranty on all products
- Shipping
- FOB Ningbo / CIF available
- 01
Send Requirements
Medium, range, output and quantity.
- 02
Quote in 12h
Matched model, price and lead time.
- 03
Pre-shipment Check
Every unit inspected against spec.
- 04
Ship FOB / CIF
Export documents handled for you.
Request a Quote
SZ551-B UV254 COD Sensor
Sales engineer replies within 12 hours
Or WhatsApp +86-15958288207
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SZ551-B questions
What ranges are available for the SZ551-B?
Standard coverage is 0–500 mg/L or 0–1500 mg/L by model. Other spans, outputs, and process connections can be sourced to match the application. Send the working pressure and medium and we will confirm the exact option.
What is the MOQ and lead time?
1 pc (flexible, no minimum for most products). 2-3 days for in-stock items, 15-30 days for custom orders. Samples are available, with freight on the buyer’s account.
Can the SZ551-B be customized?
Range, output signal, process connection, cable length customizable through our supply partners.
Do you manufacture this transmitter?
SIBXSUN is an industrial instrumentation supplier in Ningbo, not the factory. We source the SZ551-B from qualified partners, inspect before shipment, and handle export documents and logistics.
Need the right uv254 cod sensor for your process?
Send the medium, range, output, and quantity. We will confirm the matching option and a FOB Ningbo quote.
