Wind Speed sensor - low speeds

Questions about Modern Device and JeeLabs Sensors
Post Reply
donalg
Posts: 2
Joined: Wed Jan 28, 2015 5:58 am

Wind Speed sensor - low speeds

Post by donalg » Wed Jan 28, 2015 6:39 am

Hi All,

In my application, I am looking to measure wind speed in a working/office environment. The expected wind speed is within the range of 0.1m/s to 1.0m/s.
Will this sensor be able to pick these speeds reliably?

paul
Site Admin
Posts: 706
Joined: Mon May 12, 2008 4:19 pm

Re: Wind Speed sensor - low speeds

Post by paul » Sat Mar 07, 2015 11:29 am

donalg,

"It depends" - which I'm sure is not the answer you want. The sensors are exquisitely sensitive to low wind speeds. However the response varies greatly by the direction of the wind. Also it might be necessary to tweak the zero wind point up a tad, to make sure you don't miss the low end response. This is pretty easy to do by covering the sensor with something like a glass (sealing as best you can) and then waiting for the sensor to settle at it's lowest value. Record this, but then set the zero wind voltage in the sensor, just a little bit higher than the actual reading (around .15 volts should work).

Hope that helps,
feel free to call the shop is you need help being talked through this,

Paul

Ribber
Posts: 1
Joined: Sun Aug 21, 2016 5:27 am

Re: Wind Speed sensor - low speeds

Post by Ribber » Mon Aug 22, 2016 12:50 am

donalg wrote:Hi All,

In my application, I am looking to measure wind speed in a working/office environment. The expected wind speed is within the range of 0.1m/s to 1.0m/s.
Will this sensor be able to pick these speeds reliably?
How did you test at low speeds go donalg?

paul
Site Admin
Posts: 706
Joined: Mon May 12, 2008 4:19 pm

Re: Wind Speed sensor - low speeds

Post by paul » Fri Dec 02, 2016 6:35 pm

Ribber,

We tested the sensor in a wind tunnel we built. We had to include baffles to increase the pressure and decrease the speed for the lowest settings. We are not overly confident about our low speed data but it does sysch up with walking speed and tests we've done.

It is also very easy to sense the difference between a sensor that is covered by a large glass, and one that is open to ambient air in a room with air movement. No heaters or forced air heating. etc

Michaelchase
Posts: 7
Joined: Tue Sep 19, 2017 4:04 am

Wind Speed sensor low speeds

Post by Michaelchase » Sat Oct 07, 2017 8:06 pm

Hi list,
how accurate is the Lux reading obtained with the Lux-Sensor in Open Signals?
Best
Alex

Post Reply