{"title":"DFRobot RS485 Modbus IP68 Water Quality pH Sensor","handle":"rs485-modbus-water-quality-ph-sensor-ip68","url":"/products/rs485-modbus-water-quality-ph-sensor-ip68","description":"This industrial-grade water quality sensor is designed for continuous pH monitoring in demanding environments. Its integrated probe and housing provide a robust, streamlined setup for measuring pH in non-corrosive, weakly acidic and weakly alkaline water.The sensor communicates over RS485 using the standard Modbus-RTU protocol, making it suitable for IoT networks, automated monitoring systems and long-distance data transmission. Documentation and tutorials are available for Arduino development boards and DFRobot LoRaWAN projects.A built-in temperature component provides Automatic Temperature Compensation (ATC), while factory calibration lets the sensor operate out of the box without initial secondary calibration. For longer-term maintenance, it supports two-point electrode calibration via register settings and includes pH 4.01, 6.86 and 9.18 buffer powders.The package includes the RS485 Water Quality pH Sensor, 5m sensor cable, 100ml electrode protective solution (3.3mol/L KCl), pH 4.01 buffer powder, pH 6.86 buffer powder, pH 9.18 buffer powder, black protective mesh and two cable ties. White KCl crystals around the protective cap can occur normally; brush them back into the protective liquid if present.Features:Robust Communication: RS485 interface supporting standard ModBus-RTU protocol for reliable, long-distance data transmission.Industrial Durability: Integrated probe housing design featuring an IP68 waterproof rating, enabling extended continuous submersion.High Precision: Wide measurement range (0-14 pH) with a resolution of 0.01 pH and an accuracy of ±0.15 pH.Automatic Temperature Compensation (ATC): Built-in temperature sensor mitigates environmental fluctuations to ensure strict measurement accuracy.Developer Friendly: Functions seamlessly as a pH sensor for arduino with full tutorial support.Simplified Maintenance: Factory calibrated out-of-the-box, with built-in support for two-point electrode calibration.Specifications:Power Supply Voltage: 10~30V DCPower Consumption: 0.4WCommunication Interface: RS485 (Standard ModBus-RTU protocol)Measurement Range pH: 0~14 pHMeasurement Range Temperature: 0°C~+60°CMeasurement Accuracy pH: ±0.15 pHMeasurement Accuracy Temperature: ±0.5°CResolution pH: 0.01 pHResolution Temperature: 0.1°CRepeatability Error: ±0.02 pHTemperature Compensation Range: 0°C~+60°CResponse Time: ＜1SOperating Temperature: 0°C~+80°CWaterproof Rating: IP68Pressure Resistance: 0.6MPaCable Length: 5mHousing Material: Corrosion-resistant plasticWell suited to aquaculture and hydroponics, wastewater and effluent treatment, environmental surface and groundwater monitoring, smart agriculture and IoT environmental setups.","vendor":"DFRobot","product_type":"Water Quality Sensor","in_stock":true,"options":[],"variants":[{"id":15947,"title":"Default Title","sku":"DF-SEN0708","mpn":"SEN0708","price":317.15,"on_sale":false,"in_stock":true,"available_quantity":6}]}