These probes also operate on Bernoulli’s principle but are designed for specific applications. Their nomenclature varies depending on the application. Special probes are designed for flow-measurement applications where standard instruments cannot perform reliably due to complex flow conditions, high contamination levels or difficult installation environments. These probes include three-hole probes, five-hole probes, dirty probes and S-type or two-hole offset probes, each developed to capture accurate velocity, direction and pressure data in challenging operating conditions. They are commonly used in industrial stacks, wind tunnels, research laboratories, ducts, furnaces and emission-monitoring systems.

Built with durable materials and engineered for precise differential-pressure measurement, special probes offer dependable performance across a wide range of fluid velocities and temperatures. Their ability to measure multi-directional flows, withstand particulate-laden streams and function in high-temperature or corrosive environments makes them suitable for engineering studies, process optimisation and regulatory monitoring. These probes are essential tools wherever accurate and stable flow behaviour assessment is required.

Key Features & Advantages

• Designed for complex or multi-directional flow measurement

• Available in three-hole, five-hole, dirty probe and S-type configurations

• Suitable for particulate-laden, turbulent and high-temperature environments

• Compatible with differential pressure sensors and manometers

• High durability due to corrosion-resistant materials

• Suitable for research facilities and industrial operations