Sound Level Meter SL-814

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Sound Level Meter SL-814

Post by admin » Wed Nov 09, 2011 9:49 pm

Latest addendum to the family of supported "stations" is the low-cost SL-814 USB sound level meter. The meter can handle noise levels from 40 to 130 dB and can do measurement in frequency ranges A and C. You find these meters on ebay or other platforms at very low prices.
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The meter can be purchased with and without USB cable. As the cable is not just a cable but has a USB-serial interface included that makes data readable on your USB port, I do recommend to get the ones with cable (Plugging in a USB cable you may have laying around won't do - as long as it is just a cable).

To make use of it with Meteohub/Meteoplug you have to operate it with an external power supply (9V 100mA). I choose to cut a USB enlargement cable, ripped 5V from it, transferred that to 9V by this chip (http://www.produktinfo.conrad.com/daten ... _0509S.pdf), and gave it a power connector fitting into the SL-814. Picture hides my poor soldering work underneath a shrink wrap. All these parts do come at about 10 Euro in total plus 30 Euro for the SL-814 (including USB cable). Running the meter on a 9V battery will not do, as the meter shuts automatically down after about 5 minutes to save battery life.
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Meteohub (starting with version 4.8g) has the SL-814 as an additional "weather station" which gets data in dB in terms of a numeric sensor.

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Re: Sound Level Meter SL-814

Post by xcaleb » Sat Jun 08, 2013 9:38 am

Can you help me? Where can I buy the usb cabel for this SL-814?
I bought the SL-814 without usb cabel (my mistake :-( ) and now I can´t find on net this usb cabel. (this: http://sigrok.org/wiki/Device_cables#To ... -814_cable)

And second question, is it possibly connect to the meteohub higher models of sound lever meter (824, 834)? http://www.tondaj.cn/ce040_Eng/product. ... EL%20METER
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Re: Sound Level Meter SL-814

Post by admin » Sat Jun 08, 2013 10:57 am

I don't know where to get a SL-814 compatible USB cable that has the USB-serial converter included.
May be you ask the manufacturer/dealer?

I dont know, if the more feature reach upline meters do have the same USB protocol. So I cant say anything about compatibility.

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Re: Sound Level Meter SL-814

Post by xcaleb » Sat Jul 06, 2013 1:05 pm

I connected the SL-814 to the meteohub, meteohub sees devices, but the value is still 0 (on display of SL-814 is min 60 dBA). And this value (0) is only during connection. After that is sensor without update new datas and after 5 - 7 minutes sensor is disconnected (but the SL-814 is always on).
Then I have to disconnect and connect the usb and than I see again value 0 on a few minutes without update.
And second problem, If I add new station SL-814, on page with sensors I see 4 unknown sensors + 1 sensor sound lever.
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Weather in Czech Republic, Central Bohemia (GPS: 50.067773,13.640127)
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