FAT Airflow and Temperature Sensor
- Manufacturer: Nesa
- Category: Meteorology – Climatology, SENSORS, Temperature sensors, Temperature sensors for air conditioning, Wind
The NESA FAT is an indoor airflow and temperature sensor with an omnidirectional hot-wire probe. It measures air velocity from 0 to 5 m/s (0.01 m/s resolution) and temperature from -20 to 80 °C.
The sensor, located at the top of the probe, is protected by a cage and heated to a specific temperature; the airflow cools it measurably according to its speed. Output: 4÷20mA (FAT-B) and RS485 / Modbus with MCS module.
Key points
- Air speed 0 ÷ 5 m/s: ±0.02 m/s
- Temperature -20 ÷ 80 °C: ±0.3 °C (0…70 °C), ±0.4 °C outside that range
- Omnidirectional hot-wire probe
- 4÷20mA output; RS485 / Modbus with MCS module
- 12Vdc power supply, IP65 and 300g
Technical Frequently Asked Questions
What are the FAT's outputs?
The FAT-B model has dual 4÷20mA outputs (air speed and temperature). With the MCS module, it provides RS485/Modbus output.
What does FAT-B include?
5m cable, protective ball and ring for the sensing element, and calibration report. The stand is not included.
How do I order it?
Sensor (FAT), output (B: 4÷20mA), sensor-datalogger cable (05, 10 or xx, length in meters to be specified) and support (SSW, wall mount, L = 7 cm).
Properties
| Feature | Specification |
|---|---|
| Measurement and operating principle | |
| Measured magnitude | Airflow speed and temperature |
| Measurement range (airflow) | 0 ÷ 5 m/s |
| Measurement range (temperature) | -20 to 80 °C |
| Resolution | 0.01 m/s |
| Accuracy (speed) | ±0.02 m/s |
| Accuracy (temperature) | ±0.3°C (0…70°C); ±0.4°C |
| Compensation temperature range | 0 ÷ 80 °C |
| Transducer type | Omnidirectional hot-wire probe |
| Regulatory compliance | EC |
| Output signals and interface | |
| Output (version B) | 4÷20mA (speed and temperature) |
| With MCS module (optional) | RS485 / Modbus (C), with optional dual MCS module |
| Load resistance | Max. 500 Ω for current outputs |
| Calibration | It comes with a calibration report |
| Power supply, environment, and mechanical data | |
| Feeding | 12Vdc |
| Consumption | Typ. < 0.5 W |
| Protections | Against polarity reversal |
| Degree of protection | IP65 |
| Weight | 300 g |
| Supply (FAT-B) | 5m cable, ball head for the sensitive element and ring; stand not included |
| Reference | Configuration |
|---|---|
| FAT-BFATB | Model: FAT · Output signal: Dual 4÷20mA output · Supplied with: 5m cable, protective ball for the sensitive element and ring; calibration report; stand not included |
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