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RPM sensor, hall effect, includes magnets
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Click on photo to enlarge
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US Price: $30.00 USD Please call us at +1-507-454-2727 to place an order. Or click here to order online from Hall effect RPM sensor. Includes two small ceramic discs magnets. Registers pulse counts off of a magnet to measure rotational speed for wind turbine testing. Short pigtail leads attached. Can be configured with longer leads for additional cost. Part Number: APRS6569 Shipping Weight: 0.25 pounds RoHS: compliant Origin: other 
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Datasheet
Technical data sheet from the manufacturer of the sensor.
Usage with Wind Data Logger:
The RPM sensor can be connected to one of the anemometer channels as you would with a normal anemometer.
Your calibration values values for calculating RPM and total daily revolutions would be as follows (n = number of magnets used).
RPM: Anemometer m (multiplier) = 60 / n Anemometer b (offset) = 0 Total Daily Revolutions: Counter m (multiplier) = 1 / n Counter b (offset) = 0
So for an example, if you used Anemometer Channel 2 and two magnets, you could do the following:
Main Setup Menu > Anemometer Setup > Anemometer 2 AN_M2 = +0030.0000 AN_B2 = +0000.0000 Label2 = TURBINE RPM AN2_UNIT = RPM Main Setup Menu > Counter Setup > Counter 2 CNT_M2 = +0000.5000 CNT_B2 = +0000.0000 Label2 = TOTAL REVS CNT2_UNIT = CNT
