Real-time electromagnetic NPK nutrient monitoring
The Calgary Sensor Lab is developing an electromagnetic, microwave-based sensor for the real-time, in-line monitoring of NPK nutrients in agricultural liquids. By replacing manual lab analysis with continuous, automated data, the technology allows farmers to optimize fertilizer application, improve cost-efficiency, and reduce environmental impact. The project is currently advancing toward field-ready prototype deployment.
Overview
This project is developing an innovative electromagnetic, microwave-based sensor designed for real-time monitoring of nitrogen, phosphorus, and potassium (NPK) nutrient levels in agricultural liquids, such as manure. By eliminating the need for traditional, time-consuming lab-based sampling, this technology enables farmers to transition from estimated nutrient application to precision, data-driven management. The system is engineered to integrate directly into existing manure management infrastructure, providing continuous, automated data that helps optimize fertilizer usage, improve crop yields, and reduce environmental nutrient runoff.
Technical specifications
- Sensor Technology: Physics-based electromagnetic and microwave sensing system.
- Measurement Capabilities: Real-time, non-invasive detection of nitrogen, phosphorus, and potassium (NPK) in liquid streams.
- Integration: Designed to be embedded directly into agricultural manure treatment and flow systems for continuous monitoring.
- Data Delivery: Integrates with existing agricultural IoT platforms and mobile app reporting to facilitate automated decision-making.
- Handling: Capable of differentiating between dissolved nutrients and suspended solids in complex liquids like manure.
Technology readiness level
- The project is currently in the prototype development and validation stage. The research team has successfully validated all two-nutrient combinations and is currently working toward simultaneous detection of all three nutrients (NPK). A U.S. patent was filed in December 2025, and the project is currently conducting integrated prototype testing, with field trials expected to continue through 2027.
About University of Calgary
The University of Calgary is a comprehensive public research university in Alberta, Canada, known for coupling academic depth with an entrepreneurial mindset. A research and technology park adjacent to campus colocates companies with faculty labs and venture incubators, enabling shared facilities and pilot‑stage development, while co‑op and work‑integrated learning programs create direct talent pipelines. Integration with the provincial health system brings clinical care, trials, and translational research into close proximity with campus researchers. Research activity is supported by Canadian federal agencies such as NSERC, CIHR, SSHRC, and the Canada Foundation for Innovation, with additional support from provincial programs and industry consortia. A dedicated technology transfer office streamlines IP, licensing, and startup formation through standardized agreements.
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