At Coltraco, we design non-contact pressure sensors that give accurate, real-time data without disturbing your systems. Our non-invasive pressure indicators allow you to monitor gas and liquid pressure levels externally, safely, quickly, and reliably.
Whether you’re protecting critical assets with inert gas suppression or managing complex industrial systems, our technology provides precise results without physical intrusion.
Portagas® is a world’s first technology for non-invasive, non-destructive monitoring of pressurised, inert gas systems.
It is a unique and innovative solution designed to monitor the pressure of pressurized, non-liquefied inert gases and compressed gas cylinders, including Inergen®, Nitrogen, Oxygen and Argon.
Utilizing sophisticated signal processing and acoustic technology to detect even minor fluctuations in internal cylinder pressure, with precision below the 5% required by regulations and by detecting marginal changes in the internal cylinder pressure with precision well below 5% demanded by the regulations, making it a valuable tool for ensuring safety and compliance.
P/N: 3107505-GAS
CAGE Code: KD983 – COLTRACO LIMITED
The most accurate and fast acting constants loss monitoring system of its kind. Capable of detecting a loss of agent mass to within 1% in Inert gas, CO2 and Clean Agent systems, and in addition to weigh loss, will provide accurate percentage pressure loss of Inert gas systems associated with agent contents leakage.
The PermaMass® FEATHERWEIGHT is only manufactured to bespoke requirements.
P/N: 2594650-FW
CAGE Code: KD983 – COLTRACO LIMITED
A non-contact pressure sensor measures internal pressure without penetrating the container or pipeline. It uses advanced acoustic methods to detect pressure changes through external surfaces. Unlike conventional gauges, our sensors work non-invasively, making them ideal for sealed or high-risk systems.
You can monitor pressure continuously, detect gas loss, and measure even small shifts in resonant frequency, all without disrupting operation.
This capability supports industries that demand high safety and long-term stability, from healthcare and pharmaceuticals to energy, aerospace, and chemical processing.
Each Coltraco sensor detects changes in pressure by analysing the container’s natural resonant frequency. As pressure increases or decreases, the tension within the container walls changes, affecting the frequency at which the system vibrates.
Our sensors measure these subtle shifts and convert them into precise pressure readings.
Combined with temperature calibration, this method delivers unmatched accuracy. Our technology compensates for heating, cooling, or environmental variation, giving you a dependable reading regardless of conditions.
You don’t need to interrupt your system or drain containers. These sensors connect externally, meaning you can monitor oil, gas, or air under pressure without removing safety caps or disassembling units.
Our non-invasive pressure monitoring systems offer:
With no internal parts exposed to corrosive agents or physical wear, these sensors deliver long-term durability and are ideal for repeated use in demanding environments. They are also suitable for portable use and permanent installations alike.
Acoustic pressure monitoring is based on physics principles that analyse vibration, frequency, and displacement. This method detects pressure by exciting natural resonant frequencies and measuring their return in pressurised cylinders or containers.
As internal pressure changes, so does the frequency.
When temperature is accounted for, this technique allows you to determine the remaining contents, gas or liquid precisely. This method monitors everything from industrial fire suppression agents to medical gases and oil-based systems.
The approach is non-invasive, cost-effective, and capable of detecting even minor leaks long before other systems would react.
Our technology isn’t just for point-in-time checks. Coltraco sensors support continuous monitoring, meaning you can track trends, detect gradual pressure loss, and ensure compliance with safety requirements over time.
This helps you:
We also offer mass-based monitoring solutions, such as the PermaMass® FEATHERWEIGHT system. This unit converts weight changes into temperature-adjusted pressure readings, allowing you to track pressurised gas content with exceptional accuracy, ideal for systems where mass changes directly reflect internal conditions.
Coltraco’s non-contact pressure sensors are trusted in a wide range of national and global applications, including:
In all cases, the technology offers a combination of accuracy, safety, and regulatory alignment, whether you’re measuring psi, flow rate, or long-term pressure loss.
Non-invasive pressure monitoring is vital in gas fire suppression systems, including those using Inergen™, Argon, or CO₂. These systems protect critical infrastructure such as data centres, control rooms, and occupied spaces.
Monitoring the pressure inside a fire suppression cylinder ensures it contains enough gas to meet discharge requirements during an emergency. If pressure drops, even slightly, the system might not release the correct volume to extinguish a fire.
Standards like ISO 14520 and NFPA 2001 specify that cylinders must be checked regularly, and any pressure drop over 5% should trigger refilling or replacement. Coltraco’s sensors detect loss far before this threshold, alerting you early and helping prevent system failure.
Our acoustic pressure sensors also work noninvasively, meaning there is no interruption to your fire system’s operation and no risk of releasing gas during testing.
Using non-contact pressure monitoring gives you:
This approach also reduces the total cost of ownership by avoiding component wear, seal degradation, or false readings commonly seen with traditional pressure gauges and physical probes.
Our non-invasive pressure sensors are widely adopted in:
Our technology offers a superior alternative wherever accurate measurement and safe testing are essential.
All Coltraco sensors are manufactured in the UK, calibrated to the highest standards, and validated across real-world use cases. Each unit is built to withstand industrial pressures, temperature variation, and material stresses.
We combine resonant frequency analysis, digital signal processing, and precision calibration to produce repeatable, trusted data. Our systems are also software-enabled, making it easy to log, analyse, and report readings for regulatory compliance or performance tracking.
If you want to improve safety, reduce downtime, or achieve better data from your pressurised systems, Coltraco can help. Our non-invasive pressure sensors are designed for critical applications across sectors.
Whether you manage inert gas fire suppression, compressed air systems, or medical pressure vessels, we’ll provide a solution that fits your environment and regulatory needs. Gas pressure specifically needs external pressure testing. Our products offer amazing results, using only the features you want and need!
Get in touch today to request a product demo, technical advice, or a tailored quotation.
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Acoustic, non-invasive pressure monitoring systems.
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