Tinytag by Gemini Data Loggers

Gemini Data Loggers is the British designer and manufacturer of Tinytag environmental data loggers, trusted worldwide for their accuracy, reliability and long-term performance. Founded in 1984 and based in Chichester, West Sussex, Gemini has spent over 40 years designing, developing and manufacturing all Tinytag hardware, firmware and software in-house. This end-to-end control allows us to maintain exceptional quality standards, respond directly to customer needs, and deliver monitoring solutions that perform reliably in real-world environments. Tinytag data loggers measure a wide range of parameters including temperature, relative humidity, CO₂, voltage, current, count, and single- and three-phase energy consumption. Known for being robust, easy to use and cost-effective, Tinytag devices are deployed across diverse industries including manufacturing, pharmaceuticals, museums and heritage, education, energy management, research and the public sector. Our products are built to last and designed to deliver trusted environmental insight, whether for compliance, validation, energy efficiency, asset protection or long-term monitoring. Quality and sustainability are central to everything we do. Gemini operates an integrated Quality and Environmental Management System certified to ISO 9001 and ISO 14001, reinforcing our commitment to consistent product quality and responsible manufacturing. At Tinytag, we believe accurate data is the foundation of better decisions and for over four decades, we’ve helped organisations monitor, understand and protect the environments that matter most.