SZ521-A
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- CE & EMC Certified
- 12-Month Warranty
- Reply Within 12 Hours
Environmental & Water Quality Sensors
SZ521-AWater Monitoring
Four-Electrode Conductivity (Salinity) Sensor
This four-electrode conductivity (salinity) sensor measures conductivity from 0 to 200 mS/cm in three ranges (0–2, 2–20, 20–200 mS/cm), salinity from 0 to 175 ppt and TDS from 0 to 128000 mg/L, with conductivity accuracy ±1% or 0.01 mS/cm. It outputs RS-485 Modbus and supports automatic temperature compensation. Suitable for continuous water quality monitoring and industrial process measurement.
- Conductivity Accuracy
- ±1% or 0.01 mS/cm (Max)
- Conductivity Range
- 0–200 mS/cm (0–2 mS/cm, 2–20 mS/cm, 20–200 mS/cm)
- Output
- RS-485, Modbus protocol
- Power Supply
- 0.2 W; suggested DC 9–24 V, >500 mA
- RS-485 output, Modbus protocol compatible
- No polarization effect, low maintenance
- Automatic temperature compensation
- Wide range and excellent interference rejection
Specifications
SZ521-A technical data
| Parameter | Value |
|---|---|
| Conductivity Range | 0–200 mS/cm (0–2 mS/cm, 2–20 mS/cm, 20–200 mS/cm) |
| Conductivity Accuracy | ±1% or 0.01 mS/cm (Max) |
| Salinity Range | 0–175 ppt |
| Salinity Accuracy | ±1 ppt |
| TDS Range | 0–128000 mg/L |
| Response Time | <10 sec |
| Output | RS-485, Modbus protocol |
| Power Supply | 0.2 W; suggested DC 9–24 V, >500 mA |
| Housing IP Rating | IP68 |
| Maximum Pressure | 6 bar |
| Temperature Range | 0–50 °C |
| Cable Length | 10 m (default), customizable |
Applications
Where the SZ521-A 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
SZ521-A Four-Electrode Conductivity (Salinity) Sensor
Sales engineer replies within 12 hours
Or WhatsApp +86-15958288207
Related Products
SZ521-A questions
What ranges are available for the SZ521-A?
Standard coverage is 0–200 mS/cm (0–2 mS/cm, 2–20 mS/cm, 20–200 mS/cm). 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 SZ521-A 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 SZ521-A from qualified partners, inspect before shipment, and handle export documents and logistics.
Need the right four-electrode conductivity (salinity) sensor for your process?
Send the medium, range, output, and quantity. We will confirm the matching option and a FOB Ningbo quote.
