Introduction
Optimal Monitoring is collaborating with Lightricity to offer customers a new, flexible way to monitor indoor environments: 4EverAirSense.
This compact device captures important environmental data, including carbon dioxide (CO₂), temperature, humidity and light levels. It gives organisations greater visibility of conditions across their buildings, helping them identify spaces that may be uncomfortable, poorly ventilated or operating inefficiently.
Powered by innovative solar technology
4EverAirSense is powered by Lightricity’s world record-breaking photovoltaic cell technology. According to Lightricity, its PV cell is six times more efficient than other cells on the market and can operate in indoor light levels below 100 lux.
This low-light performance makes the device well suited to indoor environments where natural light may be limited.
Small, lightweight and easy to install
Measuring less than 10cm², 4EverAirSense has been designed to make installation simple and unobtrusive. Its lightweight construction means it can be mounted using double-sided tape, avoiding complex installation work and minimising disruption.
Short- and long-range versions are available, allowing the solution to be adapted for individual rooms, entire buildings and larger multi-site estates.
Monitoring the conditions that matter
4EverAirSense monitors the following as standard:
- CO₂
- Temperature
- Humidity
- Light levels
Pressure and magnetic-field sensors can also be included where required. Lightricity can work with customers to develop additional sensors for specific buildings, equipment or operational challenges.
Image of the 4EverAirSense sensor hardware
Turning environmental data into action
Collecting data is only valuable when it leads to meaningful action. By combining Lightricity’s innovative sensing technology with Optimal Monitoring’s expertise in energy and building performance, customers can gain a more complete understanding of how their spaces are operating.
The data can help organisations:
- Identify areas with consistently high CO₂ levels
- Understand temperature and humidity variations
- Highlight underused or unnecessarily lit spaces
- Support improvements to comfort and indoor environmental quality
- Strengthen maintenance and operational decision-making
- Explore relationships between indoor conditions, occupancy and energy consumption
A flexible solution for different environments
Its compact size and flexible sensor options make 4EverAirSense suitable for a wide variety of environments, including offices, healthcare buildings, schools, universities, retail sites and other multi-building estates.
Our collaboration with Lightricity brings together innovative sensing technology and Optimal Monitoring’s data-led approach to building performance. The result is a practical way for organisations to collect richer environmental data, understand their buildings more clearly and make better-informed decisions.
To learn more about 4EverAirSense and how it could support your buildings, contact the Optimal Monitoring team.
A 7-day graph example of 4EverAirSense Temperature Sensor output in the Emma Platform.
Conclusion
4EverAirSense represents a significant step forward in indoor environmental monitoring, combining advanced low-light energy harvesting with compact, flexible sensing technology. By delivering reliable, real-time insights into the conditions that affect comfort, wellbeing and energy use, it enables organisations to move from reactive management to proactive optimisation of their spaces.
To learn more about 4EverAirSense and how it could support your buildings, contact the Optimal Monitoring team.
References
Department for Energy Security and Net Zero (2025) Smart meters: your rights and expectations. Available at: https://www.gov.uk/government/publications/smart-meters-your-rights-and-expectations/smart-meters-your-rights-and-expectations (Accessed: 3 July 2026).
National Institute of Standards and Technology (NIST) (n.d.) Advanced metering in smart distribution grids. Available at: https://www.nist.gov/programs-projects/advanced-metering-smart-distribution-grids (Accessed: 3 July 2026).
Reallin (n.d.) The 100-year evolutionary history of four generations of electricity meters. Available at: https://www.reallin.com/news/the-100-year-evolutionary-history-of-four-gene-85422835.html (Accessed: 3 July 2026).
Wikipedia (n.d.) Automatic meter reading. Available at: https://en.wikipedia.org/wiki/Automatic_meter_reading (Accessed: 3 July 2026).
Wikipedia (n.d.) Theodore Paraskevakos. Available at: https://en.wikipedia.org/wiki/Theodore_Paraskevakos (Accessed: 3 July 2026).
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EMMA AI is a unique Artificial Intelligence (AI) platform that measures energy consumption across your individual sites, pinpointing exactly where money is being wasted and taking proactive measures to reduce the waste – all without having to install a single piece of equipment!