Soil Moisture NPK Sensor | 7-in-1 Agricultural Probe Accessory

This 7-in-1 agricultural soil sensor gives you a full picture of your soil's condition. It takes seven important measurements, much like a lab sensor. This helps you make smart choices about watering and fertilizing right in the field. Features and Benefits - Seven Measurements in One Probe - It checks soil moisture, temperature, humidity, electrical conductivity (EC), pH, nitrogen (N), phosphorus (P), and potassium (K). - Accurate Readings - It measures moisture with ±3% accuracy and temperature within ±0.5°C. This gives you solid information for managing your crops. - Multiple Signal Outputs - It has RS485, 4-20mA, and 0-5V options. You can connect it to your current PLC, data logger, or smart garden system. - IP68 Waterproof Casing - The probe is sealed against dust and water. You can bury it for ongoing monitoring in any weather. Applications - Greenhouse Automation - Connect this sensor to your control system. This lets you manage water and nutrients precisely for delicate plants. - Large-Scale Agriculture - Put several sensors across your fields. This helps you water more efficiently, save water, and get bigger harvests. - Garden Use - Get the exact data you need to fix soil problems. This helps you grow healthier, more productive plants in your yard. Core Technologies & How They Work This Optic Soil Sensor utilises advanced fibre optic principles to provide comprehensive soil analysis. Fibre optic sensors operate by transmitting light through a fibre cable and detecting changes in the light's properties as it interacts with the environment being measured. These changes are then correlated with specific parameters. For this 7-in-1 NPK, pH, EC sensor, various optical techniques are employed to accurately measure moisture, temperature, humidity, EC, pH, and NPK levels, providing High precision data for agriculture soil testing applications. Fiber Bragg Grating (FBG) Fibre Bragg Grating is a common method for fibre optic temperature sensors. An FBG is a periodic change in the refractive index within the core of an optical fibre. When broadband light passes through the fibre, specific wavelengths are reflected, while others are transmitted. Temperature changes cause the fibre to expand or contract, altering the grating period and thus the reflected wavelength. This shift in wavelength is precisely measured to determine the temperature. This allows for accurate temperature readings within the operating range of -20°C to 60°C, crucial for effective soil monitoring. Fluorescence (Phosphor Decay) Fluorescence, specifically phosphor decay, is another technique used in some fibre optic sensors to determine temperature. In this method, a phosphor material is illuminated by a light source via a fibre cable. The phosphor then fluoresces, emitting light at a different wavelength. The decay time of this fluorescence is temperature-dependent. By measuring how quickly the emitted light decays, the temperature can be accurately determined. This offers a robust method for temperature sensing, contributing to the comprehensive data provided by this Optic Soil Sensor. Distributed Temperature Sensing (DTS) Distributed Temperature Sensing (DTS) uses the entire length of a fibre optic cable as a sensor. This technique involves sending a laser pulse down the fibre and analysing the backscattered light. As the light travels, small portions are scattered back towards the source. Specific characteristics of this backscattered light, particularly Raman scattering, are sensitive to temperature. By precisely timing the return of the scattered light, the temperature at various points along the 2m cable can be mapped. This enables continuous temperature profiling across the soil. GaAs (Gallium Arsenide) Bandgap Gallium Arsenide (GaAs) bandgap technology is employed in certain fibre optic temperature sensors. GaAs is a semiconductor material whose optical absorption edge, or bandgap, is highly sensitive to temperature. When light is transmitted through a GaAs crystal, the amount of light absorbed changes with temperature. By measuring the intensity of the light that passes through the crystal, the temperature can be determined. This method provides a stable and accurate temperature measurement, complementing the other sensing capabilities of the Optic Soil Sensor.