RS485 ORP Sensor
MTW-ORP7330 RS485 ORP Sensor is a digital online redox potential sensor designed for water quality monitoring.Built-in high-precision platinum measuring element, it captures ORP value rapidly with stable output and strong anti-interference.
It supports automatic temperature compensation and standard RS485 MODBUS-RTU digital communication, easy to connect with PLC, DCS, data logger and cloud monitoring system.Adopting IP68 waterproof, corrosion-resistant and anti-fouling structure, it adapts to various harsh water environments for long-term continuous online operation.
This RS485 ORP Sensor is a digital online oxidation-reduction potential probe.Built in signal conversion and temperature detection, adopt high precision platinum sensing core.Output with standard Modbus RTU protocol, plug and play, suitable for continuous ORP monitoring in various industrial water.
Technical Specifications (Typical)
• Measurement Range: -2000 mV to +2000 mV.
• Electrode Material: Usually high-purity platinum or gold.
• Durability: Often rated IP68 waterproof for continuous immersion.
• Operating Temp: Standard sensors operate from 0–60°C, though specialized industrial models can reach 130°C.
Key Advantages of RS-485 Integration
• Digital Accuracy: Unlike traditional analog sensors that send a raw millivolt signal prone to
• Long-Distance Transmission: The RS-485 standard allows for reliable data transmission over cable lengths up
• Multi-Device Networking: Up to 32 sensors can typically be connected to a single pair
• Internal Data Management: Many models store calibration coefficients and internal diagnostics directly on the probe, allowing for "plug-and-play" replacement without recalibrating the entire system
Product Features
1. RS-485 transmission interface, MODBUS-RTU communication protocol, supporting bidirectional communication.
2. Isolated power supply and output design to ensure electrical safety.
3. Built-in protection circuit for enhanced anti-interference capability, suitable for complex environments.
4. Simple and user-friendly communication protocol, capable of outputting more electrode diagnostic information for greater intelligence.
5. Low-power design to accommodate a wider range of applications; internal memory retains calibration and settings during power outages.
6. PPS housing with strong corrosion resistance; 3/4-inch front and rear threads for easy installation.
Common Industrial Uses
• Disinfection Control: Monitoring chlorine or ozone effectiveness in swimming pools and drinking water (ideal ORP for disinfection is typically 650–750 mV).
• Wastewater Treatment: Controlling the removal of contaminants like cyanide and chromium in industrial effluent.
• Aquaculture: Ensuring healthy water conditions for fish by monitoring oxygen-related redox states.
• Cooling Towers: Automating chemical dosing to prevent scaling and biological growth
Technical Parameters
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ORP |
Measurement Range |
-2000mV～2000mV |
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Resolution |
1mV |
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Accuracy |
±1mV |
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Temperature |
Measurement Range |
－10.0～110.0℃ |
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Resolution |
0.1℃ |
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Accuracy |
±0.5℃ |
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Sensor Type |
Thermistor TH10K |
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Compensation |
Automatic/Manual |
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Data Transmission |
RS-485 |
MODBUS-RTU Communication Protocol |
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Other Parameters |
Power Supply |
9~27VDC |
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Isolation Strength |
2500Vrms |
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Power Consumption |
Approx0.5W |
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Material |
PPSHousing |
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Mounting |
3/4Inch Front/Rear Thread |
Product Application
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