 Stock oil temp sender testing, Resistance range? |
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| saigon71 |
 Sep 25 2018, 11:57 AM
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#1
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Senior Member  Group: Members Posts: 1,998 Joined: 1-June 09 From: Dillsburg, PA Member No.: 10,428 Region Association: MidAtlantic Region 
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I'm bench testing a stock oil temp sending unit from a taco plate. It shows resistance of 2800 ohms at room temp and 160 ohms in boiling water.
The only reference I found to the resistance range on this is from McMark on this thread: http://www.914world.com/bbs2/lofiversion/i...php?t97987.html Where he says: "These senders operate in a range of 3000 to 1000 ohms (pretty sure on this, my sample measures 2500 at room temp)." Mine drops well below 1000 ohms when hot...is it still good? |
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Replies(1 - 2)
| dr914@autoatlanta.com |
Sep 25 2018, 12:02 PM
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#2
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914 Guru Group: Members Posts: 7,858 Joined: 3-January 07 From: atlanta georgia Member No.: 7,418 Region Association: None |
considering that grounding the lead for the gauge pegs the needle, 160 seems to be a good number for the 212 degree temp
QUOTE(saigon71 @ Sep 25 2018, 10:57 AM)  I'm bench testing a stock oil temp sending unit from a taco plate. It shows resistance of 2800 ohms at room temp and 160 ohms in boiling water. The only reference I found to the resistance range on this is from McMark on this thread: http://www.914world.com/bbs2/lofiversion/i...php?t97987.html Where he says: "These senders operate in a range of 3000 to 1000 ohms (pretty sure on this, my sample measures 2500 at room temp)." Mine drops well below 1000 ohms when hot...is it still good? |
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| Dave_Darling |
Sep 25 2018, 06:41 PM
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#3
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914 Idiot Group: Members Posts: 14,986 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California
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The sender is an NTC thermistor, much like the CHT sensor and the intake air temp sensor. The resistance sounds at least in a reasonable range. I don't know exact values, but it should get close-ish to zero as the temperature gets hot.
--DD |
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