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Using the SP-2 TDS probes with Arduino
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stratosg
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Using the SP-2 TDS probes with Arduino
Sep 04, 2018, 04:13 pm
Hello,
I have seen a few posts here regarding TDS but I wanted to see if anyone can guide me in getting TDS from the mentioned probes.
The probes are:
https://www.freshwatersystems.com/p-1390-hm-digital-sp-2-dual-tds-sensor-probe-for-dm-1-dual-inline-tds-monitor.aspx?utm_source=Googlebase&utm_medium=Feed&utm_campaign=Product&utm_term=HM-SP-2&gclid=CjwKCAjw2rjcBRBuEiwAheKeL5PstaYw_OHHD0HHncSehLgXGDFtpXspxgADo_S-NJkQlnf0zuLXvBoCbBEQAvD_BwE
These are used by the very common meter:
https://www.ebay.com/itm/DM-1-Inline-Dual-TDS-Monitor-Online-RO-DI-Water-Filter-ppm-Meter-1-4-HM-Digital/392116280448
These are very accurate and inexpensive meters but I would like to integrate the readings in a larger project. So, my thought is to buy the probes and somehow interface them with the Arduino.
Now, I know that TDS measurement is a complicated issue in of itself and that DM-1 meter is probably doing a lot of cool stuff, but seeing that the probes have 4 wires each (8 total for the dual) does anyone have any clue as to how these are interfaced properly?
Any hints or guidance will be of immense help!
wvmarle
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Re: Using the SP-2 TDS probes with Arduino
#1
Sep 04, 2018, 04:24 pm
Not easy to read indeed, you need to use an AC signal for that.
Really gotta get
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the driver
in my github page. I'll also post the schematics and so there later. Really gotta get the campaign up and running first :-)
Quality of answers is related to the quality of questions. Good questions will get good answers. Useless answers are a sign of a poor question.
stratosg
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Re: Using the SP-2 TDS probes with Arduino
#2
Sep 05, 2018, 11:42 pm
Thanks for the response! Yah that would be great, any schematics or tips on implementation would be a great start.
Have you seen the sensor from DFRobot? They're doing something similar to you I think (although they have analog out).
Sneha7
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Re: Using the SP-2 TDS probes with Arduino
#3
Aug 28, 2019, 11:24 pm
Hello,
I am trying to use HM Digital SP-5 Single TDS Sensor Probes with 4 Pin Connector with Arduino. I am trying to make the TDS meter with this probe. But I am really confused how to connect it to Arduino.
Can anyone guide me with this?
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