Timeline for Digital temperature meter probe wire length
Current License: CC BY-SA 3.0
29 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 25, 2018 at 8:18 | comment | added | KalleMP | You could try it and see, use a heavy gauge wire to minimise resistance error. | |
| Apr 25, 2018 at 6:45 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Mar 25, 2018 at 11:40 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Feb 22, 2018 at 0:11 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jan 19, 2018 at 8:52 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Dec 16, 2017 at 19:51 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Nov 14, 2017 at 9:25 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Oct 12, 2017 at 15:40 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Sep 12, 2017 at 0:00 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Aug 11, 2017 at 1:07 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jul 11, 2017 at 11:15 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jun 7, 2017 at 15:47 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| May 7, 2017 at 12:33 | comment | added | Spehro 'speff' Pefhany | xs400 I bet it was actually 9.9K. And dropping when you put it in your hand means NTC unless your hand is colder than room temperature. | |
| May 7, 2017 at 12:23 | answer | added | Spehro 'speff' Pefhany | timeline score: 1 | |
| May 7, 2017 at 11:38 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Mar 31, 2017 at 1:38 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Feb 25, 2017 at 3:53 | history | bumped | CommunityBot | This question has answers that may be good or bad; the system has marked it active so that they can be reviewed. | |
| Jan 28, 2017 at 5:43 | comment | added | xs400 | @VladimirCravero - I cut the wire and measured the resistance - 9.9 Ohms at approx 25 deg Centigrade and started falling rapidly when I held the probe in my hand. So it is a PTC. Extending the cable may be harder than I thought with the resistance so low. | |
| Jan 24, 2017 at 15:59 | comment | added | Vladimir Cravero | 1Meg is not a PT100. Where is the sensor connected to the board? | |
| Jan 24, 2017 at 11:55 | comment | added | JvO | Well, my sensors are used in a totally different product. But LED vs LCD is irrelevant in this case; what is relevant if the probe is digital (like a DS18B20) or analog (PTC) I just mentioned it because from the outside the sensor looks a lot like the digital one. And 1 MOhm seems high for a PTC. | |
| Jan 24, 2017 at 11:07 | comment | added | xs400 | @VladimirCravero - seems like it is around 1M - (have to get a new battery for my MM). I could try putting an appropriate resistor in parallel to offset the resistance of the extension wire. But mostly if I know how hot the water is (so if it reads 25 and the water is actually 45 degrees), it will do for my purposes. | |
| Jan 24, 2017 at 10:59 | comment | added | xs400 | @JvO Not sure about that - do you have a LCD display? All the ones that mentioned DS18B20 had LED displays for some reason. Came across 100 meters mentioned in some application note for the DS18B20 | |
| Jan 23, 2017 at 14:52 | answer | added | HatimB | timeline score: 0 | |
| Jan 23, 2017 at 14:49 | comment | added | JvO | That sensor could also be a DS18B20 digitial 1-Wire sensor, in which case the data is transmitted digitally over the power line as a series of pulses (shorts). I've got a few with 5 meter cords and fairly thin wires (think CAT5 network cable thickness) and that works fine. 20 meters may push the limit though, as resistance and capacitance of the parallel conductors of the extension cord could distort the signal too much. | |
| Jan 23, 2017 at 11:06 | comment | added | Vladimir Cravero | It looks like a PTC. Do you have a multimeter? Can you measure the resistance of the probe? | |
| Jan 23, 2017 at 11:02 | comment | added | xs400 | @VladimirCravero - I had to remove the image because I cannot post more than 2 links. Use the first link above that takes you to the Aliexpress product listing which has the pic of the thermometer I'm talking about link | |
| Jan 23, 2017 at 10:39 | review | First posts | |||
| Jan 23, 2017 at 11:48 | |||||
| Jan 23, 2017 at 10:38 | comment | added | Vladimir Cravero | Show the wire and the probe please. | |
| Jan 23, 2017 at 10:34 | history | asked | xs400 | CC BY-SA 3.0 |
