Air flow transmitter
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Instromart presents the air flow transmitter–Monitor duct air velocity and calculated airflow with a transmitter featuring RS485 Modbus RTU communication, flange mounting, and an IP65 protection rating. Measures both air velocity and calculated airflow, using the configured duct cross-sectional area to determine volumetric airflow.
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Air Flow Transmitter
The duct air flow transmitter measures air velocity and calculates volumetric airflow using the configured duct cross-sectional area. Its multi-point probe supports ventilation monitoring, while adjustable settings allow configuration through buttons or RS485 commands.
Technical Specifications:
| Measured Quantity | Air velocity and calculated volumetric airflow |
| Model | NS-D1-0-30m/s-RS485 |
| Measuring media | Air, nitrogen, and oil fumes |
| Air velocity range | 0–30 m/s |
| Accuracy | ±2% FS |
| Resolution | 0.1 m/s |
| Air pressure range | 0–500 Pa |
| Power Supply | 10–30 V DC |
| Operating temperature | −40°C to +80°C |
| Operating humidity | ≤95% RH |
| Protection rating | IP65 |
| Long-term stability | ≤0.1 m/s/year |
| Communication | RS485, Modbus RTU |
| Configuration | Buttons or RS485 commands |
| Duct size options | DN315, DN400, DN440, DN560, DN660 |
Main Features
Features:
- Multi-point air velocity measurement.
- Airflow calculation using configured duct area.
- Adjustable flange with silicone sealing ring.
- Circuit design for interference resistance.
- Configurable measurement density.
- Side or bottom duct installation
Industrial Applications
Industrial Applications:
• HVAC duct airflow monitoring
• Cleanroom airflow validation
• Ventilation efficiency measurement
• Building automation and air balancing
• Energy-efficient ventilation control systems
Manuals & Datasheets
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