Resources:
Industrial RS485 Ammonia Nitrogen and pH Water Quality Sensor with IP68 Rating - 0-100 mg/L Range, ModBus-RTU, Automatic pH and Temperature Compensation for Aquaculture, Wastewater, and Environmental Monitoring
The Industrial RS485 Ammonia Nitrogen and pH Water Quality Sensor is an integrated industrial-grade probe and housing assembly designed for accurate, continuous measurement of ammonia nitrogen concentration in water - covering both free ammonia (NH3) and ammonium ions (NH4+) - across a 0-100 mg/L measurement range with 0.01 mg/L resolution and plus or minus 3% FS accuracy. The integrated probe and housing design consolidates the sensor element, signal conditioning, temperature compensation circuit, and RS485 communication interface into a single submersible unit, eliminating the external junction boxes, separate transmitter modules, and complex field wiring assemblies required by multi-component analogue ammonia measurement systems. IP68 waterproof rating confirms the probe and housing assembly is rated for continuous full submersion beyond 1 metre depth, sustaining reliable measurement in the wet, chemically active, and mechanically demanding environments of aquaculture tanks, wastewater aeration basins, open waterways, and hydroponic irrigation circuits.
Automatic pH and temperature compensation is applied internally by the sensor's signal processing circuit to correct measured ammonia values for the pH and temperature dependency of the NH3 to NH4+ equilibrium in water, ensuring that reported ammonia nitrogen concentration accurately reflects the total ammonia nitrogen (TAN) and free ammonia fraction across the range of pH and temperature conditions encountered in real-world aquaculture, wastewater, and environmental monitoring deployments without manual correction calculations by the operator. The RS485 communication interface with ModBus-RTU protocol provides direct integration with industrial PLCs, SCADA systems, data loggers, IoT gateways, and microcontroller-based monitoring platforms without signal conversion hardware, and the standardised ModBus-RTU register map allows the sensor to be integrated into multi-sensor monitoring networks alongside other RS485 ModBus-compatible water quality parameters. Two-point electrode calibration via the simple onboard calibration function maintains measurement accuracy over the sensor's operational life as the electrode surface ages, with the two-point calibration procedure correcting both offset and slope drift without requiring laboratory recalibration or sensor replacement at standard service intervals.
Key Features
- Measurement Parameter: Total ammonia nitrogen concentration covering free ammonia (NH3) and ammonium ions (NH4+) in water
- Measurement Range: 0-100 mg/L for broad concentration coverage from clean water baseline through to high-density aquaculture and wastewater treatment peak levels
- Resolution: 0.01 mg/L for fine-grained ammonia concentration tracking at both low background and elevated ammonia levels
- Accuracy: Plus or minus 3% FS for reliable quantitative ammonia nitrogen measurement across the full 0-100 mg/L range
- Integrated Design: Probe, housing, signal conditioning, temperature compensation, and RS485 interface consolidated in a single submersible unit without external transmitter modules
- IP68 Waterproof Rating: Continuous full-submersion waterproof rating for aquaculture tank, wastewater basin, open waterway, and hydroponic circuit deployment
- Automatic pH Compensation: Internal pH compensation corrects ammonia measurement for pH-dependent NH3 to NH4+ equilibrium shifts without manual correction calculations
- Automatic Temperature Compensation: Internal temperature compensation corrects ammonia measurement for temperature-dependent equilibrium and electrode response variation
- RS485 Communication: Industrial RS485 interface for direct integration with PLCs, SCADA, data loggers, IoT gateways, and microcontroller monitoring platforms
- ModBus-RTU Protocol: Standard ModBus-RTU register map for multi-sensor network integration alongside other RS485 ModBus-compatible water quality parameters
- Two-Point Electrode Calibration: A simple two-point calibration corrects offset and slope drift for sustained measurement accuracy across the sensor's operational life
- Industrial-Grade Construction: Industrial-grade probe and housing materials for sustained reliability in chemically active, mechanically demanding, and continuously submerged deployment environments
Applications
- High-density aquaculture fish and shrimp farming tanks require real-time free ammonia monitoring with automated water exchange or aeration system triggering before livestock harm thresholds are exceeded
- Municipal wastewater treatment aeration basin deployment for nitrification process measurement and blower power consumption optimisation based on exact ammonia reduction metrics
- River, lake, and reservoir environmental and ecological monitoring for agricultural runoff and pollution level tracking with RS485 and LoRaWAN IoT gateway integration for long-range continuous data collection
- Smart hydroponics and aquaponics closed-loop irrigation system nutrient availability monitoring for optimal plant uptake and ammonia spike prevention
- Industrial effluent discharge monitoring requiring continuous RS485 ModBus-RTU ammonia nitrogen measurement with automatic pH and temperature compensation for regulatory compliance reporting
- Multi-parameter water quality monitoring networks requiring IP68 ammonia nitrogen sensors with standardised ModBus-RTU integration alongside pH, dissolved oxygen, and turbidity sensors.
Specifications:
- Measurement Range:
Ammonia Nitrogen: 0~100 mg/L
pH: 0~14 pH
Temperature: 0 C~+60 C
- Measurement Accuracy:
Ammonia Nitrogen: +-3%FS
pH: +-0.15 pH
Temperature: +-0.5 C
- Resolution:
Ammonia Nitrogen: 0.01 mg/L
pH: 0.01 pH
Temperature: 0.1 C
Package List:
- RS485 Water Quality Ammonia Nitrogen&pH Sensor x1
- 5m sensor cable x1
- Black protective mesh x1
- Cable ties x2
