Inspeed's WS2H Hall Chip Wind Speed Sensor - Cup Anemometer Inspeed's rugged and affordable WS2 3-Cup Anemometer is a high quality, Inspeed-designed, Made In America wind speed sensor a variety of options available so it will be sure to be a great fit for your application. These options include: Sensor type: non-contacting "infinite life" Hall chip Mounting: vertical bracket or 1/2" tube mount Rotor: polycarbonate or metal Wire length: standard lengths or customized for you The WS2 wind speed sensor uses either a zero power reed switch (WS2R) or a Hall chip (WS2H) as the active element, with a magnet on the shaft that causes one pulse per rotation. (If you want 2 pulses per rotation we can do that too - let us know). The conversion factor from pulse rate to wind speed is in the specifications below. This "WS2H" page is for the Hall Sensor Version. Visit the "WS2R" Reed Switch page for the reed switch anemometer.The difference between the two is as follows: Power required: Reed Switch: 0. Hall Chip: ~3mA Life: Reed switch: depends on voltage/current applied (lower=longer). Hall chip: basically infiniteNOTE: both the reed switch and Hall PCB are replaceable items Battery-powered applications might be better off with a reed switch anemometer whereas the Hall chip might be a better choice for situations where power is available. The base product has 25' of wire for the reed switch, but we offer standard options for 50', 100', and 200' feet. If you need more, or less - reach out to us - we are happy to customize. The shaft has a Tungsten Carbide ball pressed into the end, which rides on a small sapphire. The result is very low friction - for low wind speed sensitivity, and basically zero wear - for long life. World Class Accuracy: using the appropriate conversion function from output frequency to wind speed (see the Data Sheet), this design produces wind speed readings that are within the greater of +1mph or +1% of reading between 7 and 100 mph. Tough to beat for the price, for sure. The polycarbonate rotor is designed by Inspeed based on years of experience with some tough users (mainly storm chasers!). It is light and strong - to give you years of dependable service. If you prefer a metal rotor, we can do that too. The mounting bracket can be attached to just about anything so it is easy to get up and running. the single-screw mount to the head means that you can pivot the head relative to the bracket if you need to make fine adjustments to make the rotor completely level. Alternatively we offer a tube mount base so it can be mounted to a 1/2" tube (available separately from Inspeed or customer-provided). The PCB onto which the Hall chip is mounted includes 2 Transient Voltage Suppressor (TVS) chips to protect the circuitry from lightning damage. It also includes a 3-way terminal block to which the wires are connected and a central "button" that holds the sapphire upon which the shaft rides with no friction. The Inspeed WS2R anemometer is based on simplicity, ruggedness, and a commitment to precision and accuracy.
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