Inaccurate, drifting, or unstable readings of PROBEST PINH3-900 and PISE ammonia-nitrogen electrodes can most often be resolved by replacing the NH₄N internal electrolyte. Following this standard tutorial will quickly restore accuracy, reduce downtime, and lower operating costs. Always refer to the official PROBEST electrode manual for specific filling volume and polarization time. For further technical support, please contact our service team.

ISO-certified water analysis instruments can enhance your operations with unmatched reliability! In the field of water quality monitoring, precision, reliability, and consistency are non-negotiable. At Probest, we understand that our customers depend on accurate and durable water analysis instruments to ensure safety and compliance in various industries. That’s why we adhere to the strictest international standards in manufacturing, ensuring that every device we produce meets the highest levels of quality, security, and environmental responsibility.

Why Are ISO-Certified Water Quality Instruments More Worth Choosing? You’ll Understand After Reading This

Fuzhou Probest Intelligent Technology Co., Ltd. (PROBEST) is a national high-tech enterprise and original equipment manufacturer (OEM/ODM) specializing in environmental analysis and industrial process water quality monitoring in China. With RMB 36 million registered capital and over 200 employees, we integrate R&D, manufacturing, sales, and service to deliver high-end water quality monitoring instruments and industrial process instruments. Driven by technological innovation and industry expertise, PROBEST provides full-scenario environmental monitoring solutions combining "intelligent hardware + IoT connectivity + value-added services", accelerating the digital and intelligent transformation of ecological monitoring and industrial process monitoring.