Flame Proof Air Flow Sensor in Sharjah | HVAC Air Flow Sensors
The ATEX Airflow Monitoring Sensor STS 215 KH provides reliable airflow supervision in hazardous ventilation, exhaust, and process-air systems. As a dependable Flame Proof Air Flow Sensor in Sharjah, it supports oil and gas facilities, refineries, petrochemical plants, paint booths, battery rooms, chemical processing areas, laboratories, and industrial HVAC installations.
The STS 215 KH monitors air velocities from approximately 2 to 25 m/s. Its thermal sensing principle contains no mechanically moving parts, which supports stable operation and reduces maintenance in demanding industrial environments.
This high-temperature model handles medium temperatures up to approximately 120°C in the T3 configuration. It uses a corrosion-resistant AISI 316 Ti stainless-steel housing, a fixed 2 m FEP cable, a compact 48 mm sensing length, and a G1/2 process connection.
The sensor operates with a separate SZAb 400 EX amplifier installed outside the hazardous area. The amplifier evaluates the sensor signal and provides a switching or analogue output for a PLC, BMS, SCADA platform, control panel, or alarm system.
Atex Hub supplies ATEX Airflow Sensors across Sharjah, Dubai, Abu Dhabi, Ajman, Ras Al Khaimah, Fujairah, the UAE, Saudi Arabia, Qatar, Kuwait, Oman, Bahrain, Europe, Africa, and worldwide.
What Is the STS 215 KH ATEX Airflow Sensor?
The STS 215 KH is an intrinsically safe thermal airflow sensor designed to monitor air and compatible gaseous media in explosive gas and combustible-dust areas.
The sensor installs directly inside a ventilation duct, exhaust line, process-air pipe, or fan system. Its sensing section detects changes in airflow and sends the signal to the external evaluation amplifier.
A complete monitoring arrangement normally includes:
- STS 215 KH airflow sensor
- SZAb 400 EX amplifier
- Fixed 2 m FEP cable
- G1/2 sealing gaskets
- T-piece or welding sleeve
- PLC, relay, analogue, BMS, or alarm connection
The compact 48 mm design suits applications where installation space is limited. The fixed FEP cable also supports higher process temperatures than standard PUR cable versions.
Key Features of the Intrinsically Safe Airflow Sensor
The Intrinsically Safe Airflow Sensor combines fast detection, high-temperature capability, stainless-steel construction, and certified hazardous-area protection.
- Detects airflow from approximately 2 to 25 m/s
- Measures air and compatible gaseous media
- Uses a thermal airflow-monitoring principle
- Contains no mechanically moving parts
- Supports approved Zone 0 gas installations
- Supports approved Zone 20 dust installations
- Suitable for Zone 0/1 partition-wall mounting
- Uses certified Ex ia intrinsic safety
- Gas classification up to IIC
- Dust classification for IIIC
- Medium temperature up to approximately 120°C
- Compact 48 mm sensor length
- G1/2 threaded process connection
- Fixed 2 m FEP cable
- Typical response time of approximately 3 seconds
- Pressure resistance up to approximately 10 bar
- AISI 316 Ti stainless-steel housing
- IP67 ingress protection
- Compatible with relay and analogue amplifiers
- Suitable for fan, duct, and exhaust-air monitoring
The STS 215 KH carries ATEX certificate TÜV 98 ATEX 1298 X and supports Equipment Protection Levels Ga, Ga/Gb, and Da.
How Does the STS 215 KH Airflow Sensor Work?
The Flame Proof Air Flow Sensor in Sharjah uses heat transfer to detect moving air.
The sensing element receives controlled power from the external amplifier. Air passing across the sensing surface removes heat from the element. The cooling effect changes according to airflow velocity.
The monitoring process includes:
- The sensor tip is positioned inside the airflow.
- The external amplifier powers the intrinsically safe sensing circuit.
- Air passes around the heated sensing element.
- The sensor reacts to the change in heat loss.
- The amplifier evaluates the sensor signal.
- The measured condition is compared with the selected airflow limit.
- The amplifier indicates the airflow status.
- A switching or analogue output sends the result to the control system.
The system can detect:
- Fan failure
- Reduced exhaust airflow
- Broken fan belts
- Blocked ventilation ducts
- Closed dampers
- Incorrect fan rotation
- Dirty air filters
- Loss of process ventilation
Applications of the Hazardous Area Airflow Sensor
The Hazardous Area Airflow Sensor supports ventilation and extraction monitoring in industrial areas where explosive gases, vapours, or combustible dust may occur.
- Ventilation fans: Confirms that the fan produces adequate airflow.
- Exhaust-air ducts: Monitors the removal of hazardous gases, fumes, and vapours.
- Oil and gas facilities: Supports airflow monitoring in process buildings and equipment shelters.
- Refineries: Detects loss of ventilation in hazardous operating areas.
- Petrochemical plants: Monitors exhaust and process-air systems.
- Paint booths: Confirms extraction of flammable paint vapours.
- Chemical plants: Supervises hazardous process ventilation.
- Battery rooms: Verifies airflow used to limit hydrogen accumulation.
- Industrial ovens and dryers: Supports airflow monitoring at elevated temperatures.
- Laboratories: Monitors hazardous fume-extraction systems.
- Industrial HVAC systems: Detects airflow through ducts and ventilation equipment.
- Dust-extraction systems: Supports approved airflow monitoring in combustible-dust areas.
- Fan-belt monitoring: Detects airflow loss caused by belt failure.
- Process enclosures: Confirms cooling, purge, or ventilation airflow.
Technical Specifications of the STS 215 KH
| Specification | Product Details |
|---|
| Product Name | ATEX Airflow Monitoring Sensor STS 215 KH |
| Product ID | P11212 |
| Product Type | Intrinsically safe thermal airflow sensor |
| Measured Medium | Air |
| Airflow Detection Range | Approximately 2–25 m/s |
| Measuring Principle | Thermal airflow monitoring |
| Integrated Amplifier | No |
| Output | Through separate amplifier |
| Process Connection | G1/2 |
| Sensor Length | Approximately 48 mm |
| Electrical Connection | Fixed 2 m FEP cable, 4 × 0.25 mm² |
| Typical Start-Up Time | Approximately 5–20 seconds |
| Typical Response Time | Approximately 3 seconds |
| Adjustable Response Range | Approximately 2–30 seconds |
| Pressure Resistance | Up to approximately 10 bar |
| Sensor Material | Stainless steel AISI 316 Ti |
| Housing Material | Stainless steel AISI 316 Ti |
| Ingress Protection | IP67 |
| Zone Capability | Zone 0, Zone 20 and Zone 0/1 partition wall |
| ATEX Certificate | TÜV 98 ATEX 1298 X |
| Gas Marking | II 1 G Ex ia IIC T6…T3 Ga |
| Partition-Wall Marking | II 1/2 G Ex ia IIC T6…T3 Ga/Gb |
| Dust Marking | II 1 D Ex ia IIIC T130°C Da |
| Temperature Range in T6 | Approximately −20°C to +35°C |
| Temperature Range in T5 | Approximately −20°C to +50°C |
| Temperature Range in T4 | Approximately −20°C to +85°C |
| Temperature Range in T3 | Approximately −20°C to +120°C |
| Dust-Ex Temperature Range | Approximately −20°C to +85°C |
| Maximum Input Voltage | Ui = 13.65 V |
| Maximum Input Current | Ii = 200 mA |
| Maximum Input Power | Pi = 0.69 W |
| Internal Capacitance | Ci = 0.45 nF |
| Internal Inductance | Li = 1.80 µH |
| Included Accessories | Two G1/2 AFM 34 gaskets |
| Compatible Amplifiers | SZAb 400 EX-GR, EX-WR115, EX-WR230 and EX-GA |
The STS 215 KH combines a 2–25 m/s range, 120°C maximum medium temperature, IP67 enclosure protection, 10-bar pressure resistance, and fixed FEP cable construction.
Selection, Installation and Maintenance
Correct selection and installation help maintain reliable airflow detection and hazardous-area safety.
- Confirm that the expected airflow remains within 2–25 m/s.
- Verify that the measured medium is air or a compatible gas.
- Confirm the required gas or dust hazardous zone.
- Match the required temperature class to the maximum medium temperature.
- Use the T3 configuration for temperatures up to approximately 120°C.
- Select a compatible SZAb 400 EX amplifier.
- Choose relay or analogue output according to the control system.
- Install the amplifier outside the hazardous area.
- Mount the sensor through a suitable G1/2 T-piece or welding sleeve.
- Position the sensing section fully inside the airflow.
- Avoid installation immediately after sharp duct bends.
- Keep the sensor away from severe turbulence where practical.
- Use the supplied sealing gaskets.
- Protect the fixed FEP cable from mechanical damage.
- Verify all intrinsic-safety circuit parameters.
- Allow the sensor to complete its start-up period.
- Adjust the airflow limit during commissioning.
- Test low-airflow and fan-failure alarms.
- Inspect the sensing surface for dust, oil, and deposits.
- Clean the stainless-steel sensor carefully.
- Allow only trained hazardous-area technicians to service the system.
Certifications, Standards and Compliance
The STS 215 KH supports certified airflow monitoring in hazardous gas and combustible-dust environments.
Why Choose Atex Hub for ATEX Airflow Sensors?
Atex Hub supplies ATEX Airflow Sensors for hazardous ventilation, exhaust, HVAC, fan, gas, and combustible-dust applications.
- Supplies Flame Proof Air Flow Sensors across Sharjah and the UAE
- Covers Dubai, Abu Dhabi, Ajman, Ras Al Khaimah, and Fujairah
- Provides approved Zone 0 and Zone 20 airflow sensors
- Supplies high-temperature airflow sensors up to approximately 120°C
- Offers fixed-cable and connector-based sensor models
- Provides compatible SZAb 400 EX amplifiers
- Offers relay and analogue output configurations
- Supplies T-pieces, welding sleeves, cables, and accessories
- Supports fan, duct, exhaust, filter, and process-air monitoring
- Assists with airflow range and temperature-class selection
- Supports PLC, SCADA, BMS, and alarm-panel integration
- Supplies projects across the GCC, Europe, Africa, and worldwide
Frequently Asked Questions
1. What is the STS 215 KH airflow sensor?
The STS 215 KH is an intrinsically safe thermal sensor for monitoring air movement in hazardous gas and dust areas.
2. Is it suitable as a Flame Proof Air Flow Sensor in Sharjah?
Yes. The Flame Proof Air Flow Sensor in Sharjah supports hazardous ventilation, fan, exhaust, and process-air monitoring.
3. What airflow range does it detect?
It detects air velocities from approximately 2 to 25 m/s.
4. What is the maximum medium temperature?
The sensor supports temperatures up to approximately 120°C in the T3 configuration.
5. Does the STS 215 KH include an amplifier?
No. It connects to a separate SZAb 400 EX amplifier.
6. Can it provide an analogue output?
Yes. The SZAb 400 EX-GA amplifier provides an analogue output for control-system integration.
7. Can it operate in Zone 0?
Yes. It supports approved Zone 0 gas installations.
8. Can it be used in combustible-dust areas?
Yes. It supports approved Zone 20 applications with Ex ia IIIC protection.
9. What cable does the sensor use?
It includes a fixed 2 m FEP cable with four conductors.
10. Can Atex Hub supply the complete monitoring system?
Yes. Atex Hub supplies the sensor, amplifier, fittings, mounting accessories, cables, and control components.
Conclusion
The ATEX Airflow Monitoring Sensor STS 215 KH provides reliable airflow supervision for high-temperature ventilation, extraction, and process-air applications in hazardous areas.
It monitors airflow from approximately 2 to 25 m/s and supports medium temperatures up to 120°C. Its compact 48 mm sensing length, G1/2 connection, fixed FEP cable, AISI 316 Ti construction, 10-bar pressure resistance, and IP67 protection make it suitable for demanding industrial environments.
The STS 215 KH uses Ex ia intrinsic safety and supports approved Zone 0, Zone 20, and Zone 0/1 partition-wall installations. A separate SZAb 400 EX amplifier provides the switching or analogue output.
For companies seeking a Flame Proof Air Flow Sensor in Sharjah, the STS 215 KH supports refineries, petrochemical plants, hazardous HVAC systems, paint booths, battery rooms, process ovens, dryers, laboratories, and industrial exhaust systems.
Atex Hub supplies ATEX Airflow Sensors across the UAE, GCC countries, Europe, Africa, and worldwide.
