Description
The LEFOO LFS11 Low Air Speed Transmitter is a high-precision sensor engineered specifically for monitoring low-velocity airflow in critical cleanroom and ventilation environments. Utilizing an advanced, imported MEMS hot-film sensor, it provides superior long-term stability, excellent accuracy, and strong resistance to environmental pollution and interference.
Key Technical Specifications
The standard electrical and physical configurations of the transmitter include:
- Measurement Ranges: 0–1 m/s, 0–1.5 m/s, or 0–2 m/s (selectable via an internal jumper).
- High Accuracy: ±(0.04 m/s + 3% of the measured value) at 20°C, 45% RH, and 1013 hPa.
- Resolution: 0.01 m/s.
- Dual Output Signals: RS485/Modbus digital output along with a selectable 0–10 VDC or 4–20 mA analog output.
- Working Voltage: 12–30 VDC or 24 VAC (±20%).
- Probe Details: 210mm standard length made from durable PA6 polyamide material.
- Enclosure Rating: IP65-rated Polycarbonate (PC) shell for dust and water resistance, with an IP20-rated probe.
- Display Option: Available with or without a backlit LCD display showing measurements and units.
Safety & Operational Features
- Built-in Protection: Features full overload protection and reverse-connection functionality for both power supply and outputs.
- Isolated Output: Offers an optional isolated circuit configuration to protect the system against electrical loops or feedback errors.
- Certification: Compliant with RoHS guidelines and European Electrical Safety Standards (CE).
Primary Applications
Because it accurately measures ultra-low air velocities where traditional HVAC sensors often fail, the
LFS11 Low Air Speed Transmitter is widely deployed in:
- Laminar Flow Monitoring: Ensuring strict unidirectional airflow in biological safety cabinets and operating rooms.
- Cleanrooms: Maintaining precise positive/negative air velocity dynamics in semiconductor fabrication plants and pharmaceutical clean areas.
- Medical Institutions & Labs: Managing specialized ventilation systems to control airborne contaminatio
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