Chemical Process Solutions
Accurate measurement and control solutions for safe, efficient and reliable chemical processing operations
Over 45 Years in Operation
1000's of UK Installations
Supporting 100's of UK Sites
Precise measurement and control are essential for maintaining safety, consistency and efficiency in chemical processing environments.
Chemical processes demand high levels of accuracy, repeatability and reliability to ensure safe operation and consistent product quality. From gas and liquid flow monitoring through to dosing, injection and analyser systems, instrumentation must perform under pressure, temperature extremes and corrosive conditions.
Allison Engineering provides process control solutions across a wide range of chemical applications, supporting operators with proven technologies designed for aggressive media, hazardous areas and critical process environments.
Our approach focuses on understanding the application first, ensuring the correct instrumentation is selected to deliver long-term performance, safety and operational confidence.
Chemical Applications
We support a wide range of applications across chemical processing, combining proven instrumentation with practical, application-led expertise.
Nitrogen Purge & Blanketing Monitoring
Analyser Sample Flow Monitoring Using Flow Switches
Chemical Injection Flow Monitoring Using Thermal Flow Switches
Flare Gas Metering Using Thermal Mass Flow Measurement
Fugitive Emissions Monitoring & Methane Leak Detection
Pump Protection Using Flow Monitoring and Flow Switches
High Temperature Flow Switches & Flow Meters for Combustion Air
SIL Rated Oxygen Analysis for Biogas Upgrading
SIL & SIS Compliant Process Control Instrumentation
Understanding Reynolds Number in Flow Measurement
Combustion Air Flow Measurement
Hydrogen Mass Flow Measurement
Compressed Air Monitoring for Industrial Systems
On-Site Nitrogen Generation for Industrial Applications
Atmospheric Vent Gas Monitoring
Analyser Shelter Air Flow Monitoring
Why Choose Chemical Process Control Solutions
Engineered for Chemical Environments
Instrumentation is selected to withstand aggressive media, high pressures, temperature extremes and corrosive conditions commonly found in chemical processing.
High Accuracy at Low Flow Conditions
Many chemical processes rely on precise dosing and injection at very low flow rates, requiring technologies capable of reliable and repeatable measurement.
Designed for Safety-Critical Applications
Solutions for the chemical industry are available with ATEX and SIL ratings, supporting safe operation in hazardous environments and critical processes.
Application-Led Engineering Approach
We prioritise understanding the process and application requirements, ensuring each solution is correctly specified rather than applying a generic product.
Flexible Integration with Process Systems
Instrumentation and solutions that can be integrated into your existing control systems for real-time monitoring, alarms and automated process control.
Operational Efficiency & Cost Control
Accurate measurement helps optimise chemical dosing, reduces waste and prevents costly process failures or downtime, which is essential for every operation.
Need information or advice?
Speak with our friendly, expert team to discuss your requirements and find out how we can help you.
Full Service UK Solutions
Allison Engineering supports chemical process applications from specification through to long-term operation, delivering solutions backed by technical expertise and ongoing support.
Specifications & Planning
Application review, system design and product selection based on process conditions, safety requirements and operational objectives.
Supply & Commissioning
Supply of proven technologies with support for installation, commissioning and integration into process control systems.
Support & Optimisation
Ongoing servicing, calibration, maintenance and optimisation to ensure systems continue to perform reliably over time.
Chemical Process Control FAQs
Common questions about flow monitoring, injection systems and process control in chemical applications, including safety, accuracy and system reliability.
Why is accurate flow monitoring important in chemical processes?
Accurate flow monitoring is essential to maintain process consistency, ensure correct chemical dosing and prevent system failures. In many chemical applications, even small deviations in flow can lead to reduced product quality, safety risks or increased operational costs.
Reliable measurement ensures that processes remain stable and repeatable, particularly in applications involving injection, dosing or hazardous materials.
What challenges are common in chemical flow measurement?
Chemical environments often involve high pressures, aggressive fluids, temperature extremes and hazardous conditions. In addition, many processes require accurate measurement at very low flow rates, which can be difficult for conventional technologies.
Instrumentation must therefore be robust, resistant to corrosion and capable of maintaining accuracy under challenging process conditions.
How are chemical injection systems monitored effectively?
Chemical injection systems are typically monitored using flow switches or flow meters capable of detecting very low flow rates at high pressures. These systems ensure that chemicals such as corrosion inhibitors or methanol are being delivered correctly.
Monitoring allows operators to detect blockages, pump failures or loss of flow, preventing damage to pipelines and process systems.
Why are SIL and ATEX ratings important in chemical applications?
Many chemical processes operate in hazardous environments where safety is critical. ATEX certification ensures equipment is suitable for explosive atmospheres, while SIL ratings relate to functional safety and reliability.
Using appropriately rated instrumentation helps ensure compliance with safety standards and reduces risk in critical applications.
What types of gases are commonly measured in chemical processes?
Common gases include nitrogen for purging and blanketing, hydrogen for processing, air for combustion or oxidation and various process gases depending on the application.
Each gas presents different measurement challenges, requiring careful selection of instrumentation based on composition, pressure, temperature and flow conditions.
How do I choose the right instrumentation for chemical applications?
Selection depends on the process conditions, including pressure, temperature, chemical compatibility, flow range and safety requirements. It is also important to consider whether the application involves gas or liquid, low or high flow, and hazardous-area classification.
An application-led approach ensures that the chosen solution delivers reliable performance and long-term value.
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Why Trust Allison Engineering
We are committed to delivering the highest standards across the specialist areas we support, combining proven products with practical engineering knowledge and dependable service.
Need Help Optimising Your Biogas Process?
Speak to our team to identify the right measurement, analysis and control solutions for your application - from individual instruments to fully integrated systems designed to improve performance, reliability and efficiency.