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Precision Water Quality Monitoring

Advanced digital sensors and transmitters for pH, dissolved oxygen, conductivity, turbidity, chlorine, and multi-parameter analysis. Trusted by industries worldwide for reliability, accuracy, and durability.

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Engineered for Accuracy & Reliability

Chinatwinno is a leading manufacturer of digital water quality sensors and monitoring systems. With a strong focus on innovation and precision engineering, we deliver high-performance solutions for industrial process control, environmental monitoring, wastewater treatment, aquaculture, food & beverage, and laboratory applications.

Our products are designed with advanced digital signal processing, robust materials, and intelligent calibration features to ensure long-term stability and minimal maintenance.

Digital RS485 Output
IP68 Waterproof Design
Wide Temperature Range
Low Maintenance
Digital DO Sensor

Our Product Range

High-precision digital sensors and transmitters for every water quality parameter

Digital pH Sensor

Digital pH Sensor

High-accuracy digital pH electrode with RS485 Modbus output. Suitable for industrial and laboratory applications.

  • • Range: 0–14 pH
  • • Temp: -5 to 95°C
  • • Output: RS485 Modbus
  • • IP68 Rating
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Digital DO Sensor

Digital Dissolved Oxygen Sensor

Fluorescence-based DO sensor with self-cleaning option. No electrolyte or membrane required.

  • • Range: 0–20 mg/L
  • • Optical Fluorescence
  • • RS485 Output
  • • Long Life, Low Maintenance
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Conductivity Sensor

Digital Conductivity Sensor

Inductive conductivity sensor for high-salinity and corrosive environments.

  • • Range: 0–2000 mS/cm
  • • 4-Electrode Design
  • • RS485 Interface
  • • Chemical Resistant
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Turbidity Sensor

Digital Turbidity Sensor

90° scattered light method with automatic wiper option. Ideal for wastewater and drinking water.

  • • Range: 0–4000 NTU
  • • 860nm Infrared Light
  • • Self-Cleaning Option
  • • RS485 Output
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Residual Chlorine Sensor

Digital Residual Chlorine Sensor

Amperometric sensor for continuous monitoring of free chlorine in water.

  • • Range: 0–5 ppm
  • • Membrane Cap Replacement
  • • RS485 Communication
  • • Stable Long-Term Output
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ORP Sensor

Digital ORP Sensor

Platinum electrode with digital output for oxidation-reduction potential measurement.

  • • Range: -2000 to +2000 mV
  • • High Stability Reference
  • • RS485 Interface
  • • Suitable for Ozone & Chlorine
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COD Sensor

Digital COD Sensor

UV254 absorption method for chemical oxygen demand estimation without reagents.

  • • Non-Chemical Method
  • • Real-Time Monitoring
  • • RS485 Output
  • • Low Maintenance
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Multi-Parameter Sensor

Multi-Parameter Transmitter T6200

Dual-channel digital transmitter for pH/DO, EC/EC, or FCL/Turbidity monitoring.

  • • Dual Input Channels
  • • LCD Display
  • • 4-20mA + RS485
  • • Industrial Grade
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Our Solutions

Comprehensive water quality monitoring systems for diverse industries

Industrial Process Control

pH, conductivity, and DO monitoring in chemical, pharmaceutical, and food processing.

Wastewater Treatment

TSS, turbidity, chlorine, and multi-parameter systems for effluent compliance.

Drinking Water

Residual chlorine, turbidity, and pH monitoring for safe water distribution.

Aquaculture

Dissolved oxygen, pH, and temperature control for fish and shrimp farming.

Comprehensive Support & Resources

We provide full technical support, documentation, and service to ensure your success.

Download Manuals

Access operation manuals for pH, DO, conductivity, chlorine, and turbidity series.

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After Sales Service

Calibration, repair, and technical consultation available worldwide.

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FAQs

Find answers to common questions about installation, calibration, and troubleshooting.

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Get in Touch

For product inquiries, technical support, or partnership opportunities, visit our official website.

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