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Temperature sensor recommendations

Created by: L L at: 10/4/2019 6:15 PM (9 Replies)

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10 Entries

10/4/2019 6:15 PM	Rate (0)
L L Posts: 34 Rating: (0)	I’m planning a temperature monitoring project using the LOGO 6ED1052-1MD08-0BA0. For it’s 4 analog capable inputs, what low-cost brand/model# is recommended for sensors? Temperature measurement range is 70 to 200°F.
L L Posts: 34 Rating: (0)
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10/4/2019 6:26 PM	Rate (1)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 1/12/2026 Posts: 36436 Rating: (4547)	You have 2 options: - Temperature transmitter with 0-10V output. - Temperature transmitter with 0 / 4-20mA output. Since then but still is required a resistance of 500 ohms for the conversion of the current signal in a voltage signal 0-10V. What do you want to use as a temperature sensor? PT100 or PT1000? Or something else?

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This contribution was helpful to 1 thankful Users RKBIS

10/4/2019 6:41 PM	Rate (0)
L L Posts: 34 Rating: (0)	I've created many digital I/O projects with LOGO. But, being new to analog input, I am unsure of the proper analog devices needed...or their benefits/deficiencies. This project simply monitors boiler supply and return temperatures. My program will provide display readouts for time and temperature statistics.
L L Posts: 34 Rating: (0)
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10/4/2019 6:45 PM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 1/12/2026 Posts: 36436 Rating: (4547)	Is this private or commercial?

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10/4/2019 6:56 PM	Rate (0)
L L Posts: 34 Rating: (0)	It is for my personal use with my recently installed residential hot water heating and domestic hot water system. I am a hobbyist and enjoy tinkering with home automation. The current monitoring system features $13US digital temperature displays. I wish to convert to LOGO so I can monitor boiler operation from my PC and/or mobile device. Therefore, I'm mildly price sensitive in regard to the sensors.
L L Posts: 34 Rating: (0)
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10/4/2019 7:04 PM	Rate (1)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 1/12/2026 Posts: 36436 Rating: (4547)	There by Ebay cheap converters for PT100 / 1000 sensors from China. And PT100 / 1000 sensors will probably give it cheap on Ebay. Like this https://www.ebay.com/c/854558743

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This contribution was helpful to 1 thankful Users RKBIS

10/4/2019 7:17 PM	Rate (0)
L L Posts: 34 Rating: (0)	Interesting. Thanks for the info! So, I assume a PT100/1000 sensor is connected to the convertor, which then is wired to the LOGO analog input (AI1, AI2, AI7 & AI8)?
L L Posts: 34 Rating: (0)	Last edited by: L L at: 10/04/2019 19:17:36
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10/4/2019 7:23 PM	Rate (1)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 1/12/2026 Posts: 36436 Rating: (4547)	The converter that I have linked to you is suitable for 2-wire, 3-wire and 4-wire PT100 / 1000. It requires a supply voltage of 24VDC and has a 0-10V output, which you can connect directly to the analog inputs of the base module.

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This contribution was helpful to 1 thankful Users RKBIS

10/4/2019 7:26 PM	Rate (0)
L L Posts: 34 Rating: (0)	Thanks for your assistance.
L L Posts: 34 Rating: (0)
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This contribution was helpful to 1 thankful Users ixo65

10/4/2019 7:27 PM	Rate (0)
ixo65 Grandmaster Joined: 12/18/2014 Last visit: 1/12/2026 Posts: 36436 Rating: (4547)	Hello L L, you're welcome ...

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