About us
Smart Remote Environmental Monitoring Systems
HSL Plexus provide automated, remote environmental monitoring technology and advanced IoT sensors that help organisations across the UK manage critical assets, identify risks and stay compliant.
Developed using innovative Plexus technology, our solutions reduce reliance on time-consuming, in-person checks, giving your teams access to reliable, real-time data and alerts that can help issues be resolved more quickly.
From water systems, CO₂ measuring and medical fridge alerts to wider environmental conditions. HSL Plexus provides the visibility teams need to understand what is happening across their systems, enable purposeful decision making and act when it matters.

How Our IoT Remote Monitoring System Works
Our Plexus technology works alongside your team by automating routine monitoring tasks and highlighting issues as they occur.
As manual checks can be resource and time intensive and vulnerable to human error, our systems provide continuous monitoring that enables your team to make insight-driven decisions and resolve potential issues before the next scheduled check is due.
Our IoT monitoring technology collects up to four readings every minute from connected assets. This data is then securely processed and fed back to the teams through a report that is set to your specific parameters and simplified, giving teams real-time access to information without the need for constant manual intervention.
The data is segmented for different sites, management levels and internal restrictions based on your team structure, resulting in a system that allows for a more efficient approach to monitoring and compliance.
Our solutions are UK-designed and UK-manufactured, combining reliable hardware with customisable data collection and user-friendly monitoring platforms. Your team will be provided with full training to enable them to get the biggest benefit from the technology.
Sensors connected to deployed nodes continuously capture key data from your environment and feed it back to the Plexus Hub, giving you real-time visibility, alerts and insights through your personalised Plexus Portal.
Sensors
Nodes
Hub and Portal

Awards & ISO Accreditations
Quality Management Systems (ISO 9001:2015)
Environmental Management Systems (ISO 14001:2015)
Information Security Management System ISO 27001





Environmental Monitoring and IoT Expertise

HSL Plexus is now part of HSL Compliance, a leading UK environmental group, that supports businesses with legislation and legal obligations. Plexus Innovation brings together specialist knowledge in IoT, remote sensing, data management and environmental monitoring.
We know the importance of ensuring your site meets compliance regulations and believe that remote monitoring technology should help you always keep your sites legally compliant and safe. Which is why Plexus’ custom dashboards focus delivering the relevant data to the correct point of contact in a time-sensitive way.
Our UK-designed technology is designed to be reliable and easy to use, helping organisations gain greater oversight of the systems they are responsible for.
The technical expertise of the Plexus team combined with their practical understanding of operational challenges mean we deliver solutions that meet your needs, improve your compliance and help your understanding of the intricate details of your facilities thrive.
Our Approach
Our approach is simple, we work with you to understand the challenges your organisation is facing, identify what needs monitoring and provide the data your team needs to act.
Every organisation has different assets, processes and compliance requirements. We work with you to understand your systems, priorities and approach to risk, then tailor the solution around your needs. From installation through to ongoing monitoring, we partner with your team to deliver a practical solution that works.
Our nationwide coverage means we have the capability to act quickly with set-up and installations and be responsive in time-critical situations.
Our solutions are designed to help teams:
