ebm-papst "tachometer" fans allow external monitoring via a signal which is generated from a sensor integrated within the fans electronics.  Speed-proportional, square-wave signals are created in accordance of the motor speed.
 
 
  
  - Conveys current fan speed via an integrated sensor
  
  - Open-collector signal output
  
  - 3 wire model
  
  - White speed signal wire
  
 
 
  Product details
 
|  Supply Voltage VDC:
 
  12V 
 | 
 
 
|  Fan Frame Type:
 
  Square 
 | 
 
 
|  Fan Frame Size:
 
  119mm 
 | 
 
 
|  External Depth:
 
  25mm 
 | 
 
 
|  Bearing Type:
 
  Ball Bearing 
 | 
 
 
|  Air Flow - CFM:
 
  100.1CFM 
 | 
 
 
|  Noise Rating:
 
  43dBA 
 | 
 
 
|  Power Rating:
 
  5.3W 
 | 
 
 
|  Rated Speed:
 
  2900rpm 
 | 
 
 
|  Power Connection Type:
 
  3 Lead Wires, Sensor Output 
 | 
 
 
|  Current Rating:
 
  - 
 | 
 
 
|  IP Rating:
 
  IP20 
 | 
 
 
|  Air Flow - m3/min:
 
  2.834m³/min 
 | 
 
 
|  Product Range:
 
  4400F 
 | 
 
Other details
| Brand | 
EBM-PAPST | 
| Part Number | 
4412F/2 | 
| Quantity | 
Each | 
| Technical Data Sheet EN | 
  | 
All product and company names are trademarks™ or registered® trademarks of their respective holders. Use of them does not imply any affiliation with or endorsement by them.