S450/S452 – Explosion‑Proof Flow Sensor (Insertion / In‑Line)
Flow sensor designed for harsh industrial environments and ATEX applications
- Direct measurement of mass flow and standard flow without the need for pressure compensation.
- Wireless interface for on-site configuration and monitoring of the sensor.
- Robust and durable design for harsh environments, including outdoor use (IP67).
- No moving parts, ensuring low maintenance and zero clogging.
- Compatible with explosive environments (ATEX/IECEx option).
- Supports a wide range of pipe sizes: insertion type for large diameters and in-line type for small diameters.
- Configurable outputs: 4–20 mA, pulse, HART, or Modbus, for flexible integration with industrial systems.
Description

Obtain reliable measurements even in explosive environments.
The SUTO S450 and S452 flow sensors use the thermal mass flow measurement principle, also providing standard volumetric flow. Their measurements are independent of gas pressure and temperature, ensuring accurate results under any condition.
Thanks to their wide measurement range, the S450 and S452 are ideal for detecting everything from small leaks of natural gas or compressed air to the normal consumption of pneumatic installations, helping monitor compressor performance and optimize energy efficiency in industrial settings.
Applications
All parts in contact with the measuring medium are made of 316L stainless steel, ensuring resistance and durability even with corrosive gases.
The sensor features two calibration curves, enabling high-precision measurements for two different gases.
Compatible with multiple communication protocols: 2 analog outputs (4–20 mA), pulse output, Modbus, HART, and M-Bus, facilitating integration into existing industrial systems.
Ideal for flow monitoring in explosive or highly demanding environments, ensuring safety and reliability in critical applications.
Advantages
Compatible with a wide range of pipe sizes and connection types (threaded, flanged, DN15–DN80; other sizes available upon request).
Integrated display showing flow, consumption, medium temperature, and diagnostic results, allowing fast and efficient monitoring.
Robust metal housing with IP67 design, ideal for outdoor use and harsh industrial environments.
Easy installation and minimal maintenance, reducing downtime and operational costs.

Videos
Technical Details and Special Features
- Adaptable measurement: allows adjustment of parameters directly on-site via the wireless interface, without interrupting the process.
- Low energy consumption: designed to operate efficiently, minimizing load on existing electrical systems.
- Advanced diagnostics: integrates self-check functions that provide real-time alerts for potential blockages or faults.
- Resistance to extreme conditions: withstands vibration, dust, and humidity, ideal for demanding industrial plants.
- Traceable calibration: each sensor is delivered with a calibration certificate, ensuring compliance with international standards.

Downloads
Related Products
Exair Cabinet Coolers
Stop electronic control downtime caused by heat, dirt and humidity!
- Keep line control boards cool and pressurized!
- Can be easily installed on any electronic board!
- Maintain board integrity according to NEMA 12, 4 or 4X!
- Comply with American and European UL and CE standards!
Exair Cabinet Coolers
Stop electronic control downtime caused by heat, dirt and humidity!
- Keep line control boards cool and pressurized!
- Can be easily installed on any electronic board!
- Maintain board integrity according to NEMA 12, 4 or 4X!
- Comply with American and European UL and CE standards!
Pneumatic Liquid Vacuum Cleaner – Drum Vac Reversible Exair
The Drum Vac Reversible EXAIR is an industrial-strength pneumatic liquid vacuum cleaner that pumps 100 liters of water in less than 90 seconds — with no electricity, no motors, and no maintenance required.
- ✓Pumps 100 liters of water in less than 90 seconds — industrial-strength vacuum for liquids.
- ✓No motors or propellers to clog or damage — completely maintenance-free operation.
- ✓Reversible design — vacuums or pumps liquids as needed.
- ✓Reliable Drum Vac Reversible EXAIR for industrial liquid handling applications.
Pneumatic Liquid Vacuum Cleaner – Drum Vac Reversible Exair
The Drum Vac Reversible EXAIR is an industrial-strength pneumatic liquid vacuum cleaner that pumps 100 liters of water in less than 90 seconds — with no electricity, no motors, and no maintenance required.
- ✓Pumps 100 liters of water in less than 90 seconds — industrial-strength vacuum for liquids.
- ✓No motors or propellers to clog or damage — completely maintenance-free operation.
- ✓Reversible design — vacuums or pumps liquids as needed.
- ✓Reliable Drum Vac Reversible EXAIR for industrial liquid handling applications.
EXAIR Ultrasonic Leak Detector – 5 Proven Ways to Find Costly Compressed Air Leaks
The EXAIR Ultrasonic Leak Detector — eliminating waste is the first step in a successful compressed air savings project.
- ✓Find and eliminate leaks at any point in your system using EXAIR ultrasonic leak detection technology.
- ✓Reduce the load on your compressed air generation system with EXAIR air leak detection.
- ✓Detect steam, refrigerant gas, and vacuum leaks with ultrasonic leak detection equipment EXAIR.
- ✓Reduce your operating costs and the environmental impact of operation with EXAIR ultrasonic leak detection solutions.
EXAIR Ultrasonic Leak Detector – 5 Proven Ways to Find Costly Compressed Air Leaks
The EXAIR Ultrasonic Leak Detector — eliminating waste is the first step in a successful compressed air savings project.
- ✓Find and eliminate leaks at any point in your system using EXAIR ultrasonic leak detection technology.
- ✓Reduce the load on your compressed air generation system with EXAIR air leak detection.
- ✓Detect steam, refrigerant gas, and vacuum leaks with ultrasonic leak detection equipment EXAIR.
- ✓Reduce your operating costs and the environmental impact of operation with EXAIR ultrasonic leak detection solutions.
EXAIR Digital Noise Level Meter – 5 Ways to Reduce Industrial Noise & Comply with NOM-011-STPS-2001
Long-term exposure to high sound levels can lead to hearing loss, operator fatigue, reduced productivity, and safety risks. Implementing reliable EXAIR noise level detection systems allows companies to monitor workplace noise conditions and take corrective actions before noise exposure becomes dangerous.
The unit provides accurate noise level measurement capabilities through a simple and easy-to-use handheld design. It measures sound levels between 35 dB and 130 dB and includes both A and C weighted measurement scales for evaluating different industrial sound conditions. These measurement options help maintenance personnel and safety managers analyze noise levels accurately across multiple applications. One of the key advantages of this sound level meter for industrial use is its ability to operate in dynamic industrial environments.
The instrument includes fast and slow response time settings that allow users to measure both stable and rapidly changing sound conditions. The fast response setting captures sudden noise variations, while the slow response setting provides stable readings for continuous monitoring applications. The integrated Max Hold function continuously records and updates the highest detected sound level during operation. This feature is especially useful for identifying the loudest areas in industrial facilities and evaluating noise generated by compressed air equipment, machinery, and manufacturing processes.
Digital noise monitoring EXAIR technology is commonly used in manufacturing plants, automotive facilities, packaging operations, food processing plants, and metalworking industries. Companies implementing these systems can reduce workplace risks, improve employee safety, support hearing conservation programs, and create safer industrial environments. For more information visit EXAIR Official Website and OSHA.
The EXAIR Digital Noise Level Meter is a professional sound monitoring device designed for accurate industrial noise measurement and workplace safety compliance using advanced EXAIR noise level detection systems.
- ✓Digitally measure noise levels from 35 dB to 130 dB in industrial work environments.
- ✓Includes portable carrying case and 9V battery for immediate use.
- ✓Fast and slow response modes plus Max Hold function for dynamic environments.
- ✓Helps comply with NOM-011-STPS-2001 workplace noise regulations.
- ✓Reliable EXAIR noise level detection systems for industrial safety programs.
EXAIR Digital Noise Level Meter – 5 Ways to Reduce Industrial Noise & Comply with NOM-011-STPS-2001
Long-term exposure to high sound levels can lead to hearing loss, operator fatigue, reduced productivity, and safety risks. Implementing reliable EXAIR noise level detection systems allows companies to monitor workplace noise conditions and take corrective actions before noise exposure becomes dangerous.
The unit provides accurate noise level measurement capabilities through a simple and easy-to-use handheld design. It measures sound levels between 35 dB and 130 dB and includes both A and C weighted measurement scales for evaluating different industrial sound conditions. These measurement options help maintenance personnel and safety managers analyze noise levels accurately across multiple applications. One of the key advantages of this sound level meter for industrial use is its ability to operate in dynamic industrial environments.
The instrument includes fast and slow response time settings that allow users to measure both stable and rapidly changing sound conditions. The fast response setting captures sudden noise variations, while the slow response setting provides stable readings for continuous monitoring applications. The integrated Max Hold function continuously records and updates the highest detected sound level during operation. This feature is especially useful for identifying the loudest areas in industrial facilities and evaluating noise generated by compressed air equipment, machinery, and manufacturing processes.
Digital noise monitoring EXAIR technology is commonly used in manufacturing plants, automotive facilities, packaging operations, food processing plants, and metalworking industries. Companies implementing these systems can reduce workplace risks, improve employee safety, support hearing conservation programs, and create safer industrial environments. For more information visit EXAIR Official Website and OSHA.
The EXAIR Digital Noise Level Meter is a professional sound monitoring device designed for accurate industrial noise measurement and workplace safety compliance using advanced EXAIR noise level detection systems.
- ✓Digitally measure noise levels from 35 dB to 130 dB in industrial work environments.
- ✓Includes portable carrying case and 9V battery for immediate use.
- ✓Fast and slow response modes plus Max Hold function for dynamic environments.
- ✓Helps comply with NOM-011-STPS-2001 workplace noise regulations.
- ✓Reliable EXAIR noise level detection systems for industrial safety programs.
Vac-u-Gun Exair Pneumatic Hand Vacuum Vacuum Cleaner
Move parts, materials or scrap – without using moving parts!
- Easily move granular material such as pellets or grains.
- Simple to install, can be retrofitted to existing pipelines.
- Various materials and diameters available for all applications.
Vac-u-Gun Exair Pneumatic Hand Vacuum Vacuum Cleaner
Move parts, materials or scrap – without using moving parts!
- Easily move granular material such as pellets or grains.
- Simple to install, can be retrofitted to existing pipelines.
- Various materials and diameters available for all applications.
Exair Fluid Atomizing Nozzles
All stainless steel construction for durability and corrosion resistance.
- Easily regulate and control the amount of atomized liquid !
- Various spray patterns to cover different applications!
- Patented drip-free attachment available as an option!
- Available in internal mix, external mix and siphon fed!
Exair Fluid Atomizing Nozzles
All stainless steel construction for durability and corrosion resistance.
- Easily regulate and control the amount of atomized liquid !
- Various spray patterns to cover different applications!
- Patented drip-free attachment available as an option!
- Available in internal mix, external mix and siphon fed!
Circular Air Curtain – EXAIR Super Air Wipe – 5 Proven Ways to Clean & Dry Cylindrical Parts
The EXAIR Super Air Wipe is a high-efficiency circular air curtain designed for uniform 360° cleaning, drying, and cooling of cables, hoses, pipes, wires, and extrusion products with minimal compressed air consumption.
- ✓Uniform 360° airflow for complete surface coverage with low compressed air consumption.
- ✓Silent industrial operation with no moving parts for maintenance-free performance.
- ✓Stainless steel construction with high temperature resistance up to 420°C.
- ✓Easy split design installation — adjustable airflow and blowing force.
- ✓Reliable EXAIR air curtain for cables, hoses, pipes, tubing, and extrusion products.
Circular Air Curtain – EXAIR Super Air Wipe – 5 Proven Ways to Clean & Dry Cylindrical Parts
The EXAIR Super Air Wipe is a high-efficiency circular air curtain designed for uniform 360° cleaning, drying, and cooling of cables, hoses, pipes, wires, and extrusion products with minimal compressed air consumption.
- ✓Uniform 360° airflow for complete surface coverage with low compressed air consumption.
- ✓Silent industrial operation with no moving parts for maintenance-free performance.
- ✓Stainless steel construction with high temperature resistance up to 420°C.
- ✓Easy split design installation — adjustable airflow and blowing force.
- ✓Reliable EXAIR air curtain for cables, hoses, pipes, tubing, and extrusion products.
Super Air Amplifier Exair
The Super Air Amplifier EXAIR vents, extracts, cools, dries, and cleans using compressed air amplification technology — delivering high instantaneous airflow with more air volume and less energy consumption, with no moving parts.
- ✓No moving parts — completely maintenance-free with high instantaneous airflow output.
- ✓More air volume with less energy consumption — efficient compressed air amplification.
- ✓Compact, low profile, and easy to install in any industrial environment.
- ✓Reliable Super Air Amplifier EXAIR for venting, extracting, cooling, drying, and cleaning applications.
Super Air Amplifier Exair
The Super Air Amplifier EXAIR vents, extracts, cools, dries, and cleans using compressed air amplification technology — delivering high instantaneous airflow with more air volume and less energy consumption, with no moving parts.
- ✓No moving parts — completely maintenance-free with high instantaneous airflow output.
- ✓More air volume with less energy consumption — efficient compressed air amplification.
- ✓Compact, low profile, and easy to install in any industrial environment.
- ✓Reliable Super Air Amplifier EXAIR for venting, extracting, cooling, drying, and cleaning applications.






















