Digital RS485 Modbus Water Quality Detector Monitoring Electrical Conductivity Ec Sensor

• Customization: Available
• After-sales Service: Yes
• Warranty: 3 Years
• Model NO.: STW34
• Display: Digital
• Appliance: Water
• Portable: Non Portable
• Certification: RoHS, CE
• Type: Ec
• Function 1: Water Quality Monitor
• Funciton 2: Wastewater Treatment
• Function 3: Wireless Water Quality Detector
• Function 4: Water Quality Sensor
• Transport Package: Carton Box
• Specification: 20*14*8
• Origin: China
• HS Code: 9032890000
• Production Capacity: 1000PCS/Month
• Package Size: 25.00cm * 25.00cm * 15.00cm
• Package Gross Weight: 3.000kg

Product Description

Ammonia Nitrogen Sensor for Wastewater Treatment

What's this product?   

      The EC Sensor is a digital sensor featuring an easy-to-integrate RS485 communication interface and standard Modbus protocol, It is equipped with a corrosion-resistant housing, IP68 protection rating, suitable for operation in various harsh working environments; Using an industrial-grade graphite quadrupole electrode, suitable for full-scale conductivity measurements; The electrode constant remains highly stable, unaffected by polarization effects; automatic compensation for surface contact resistance ensures immunity to contamination; Equipped with a built-in PT1000 temperature sensor and compensation algorithm, achieving an accuracy of ±0.1℃;

      By leveraging the relationship between salinity, TDS, and conductivity, the system can extend to measure salinity parameters, broadening its application scope; the integrated liquid level measurement feature, ensure widespread application in urban pipeline monitoring.

Operation principle

     Conductivity is a measure of a medium's ability to conduct electrical current. unit by μS/cm or mS/cm. At room temperature, pure water has a conductivity of less than 0.05 μS/cm, natural or surface water ranges between 100–1000 μS/cm, while acidic or alkaline solutions can exhibit conductivity exceeding 1000 mS/cm.

     The conductivity of a solution is determined by measuring the voltage and the current between two coaxial electrodes immersed in the solution . Based on Ohm's Law, the solution's resistance is calculated as R=V/I, and the reciprocal of this resistance defines the conductance S=1/R. By incorporating the electrode-specific constant K, the conductivity of the solution can be directly derived

Features

1. Drinking water/surface water/various water supply/industrial water treatment;
2. Signal output: RS-485(Modbus/RTU protocol) is convenient to connect to third-party equipment such as PLC, DCS, industrial control computer, general controller, paperless recording instrument or touch screen;
3. Immersion installation, with 3/4NPT pipe thread, easy to sink installation or installation in pipes and tanks;
4. IP68 protection level;

Installation

During installation and testing, maintain a minimum distance of 2 cm from the container's bottom and side walls

Technical Specification

(Custom configurations available upon request.)

Model No.	STW34	Temperature compensation	Auto/Manual
Measurement parameter	EC	Voltage	DC12V-DC24V
Measurement range	0-20 mS/cm(0-99℃)	Communication mode	RS485 (Modbus RTU)
Measurement accuracy	±5%	Protection rating	IP68
Resolution	0.01mS/cm	Extension cable	5m

Company Profile

Who we are

ShenZhen StarWSN is a professional liquid level and water quality monitoring device company which established in 2016. We focusing on the application of smart sensing technology in drainage network and river level monitoring. The main product include wireless water level detector,wireless pressure sensor,river flow monitoring station and online water quality analyzer etc. The products are widely used in smart city, environmental protection, municipal, chemical, power, sewage treatment, 
emergency rescue and other fields.   
                                                           
The company fully implements the ISO9001 quality management system,passed over 20 types of reliability tests and certifications. With leading research and development capabilities for software and hardware. Committed to providing high-quality products and "one-stop" services to all the customers.

Packaging & Shipping

FAQ

Q: What's the lead time for orders?
A: Standard models ship in 15–30 days; customized units require 30–45 days.

Q: Do you provide after-sales service overseas?
A: Yes, we have partnered service centers in key regions.

Q: Can I request a customized order?
A: Absolutely! We offer OEM and ODM service.

Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).

Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.