 Oil Temp Gauge Revisited, 200c temp sensor resistance vs temperature |
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| Superhawk996 |
 Jun 18 2026, 02:19 PM
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#1
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914 Guru  Group: Members Posts: 7,902 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch 
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I think most people are familiar with the Panorama calibration graphics.
 What I haven’t been able to find is the actual calibration curve for the 200C temp sensor that goes into the taco plate. So . . . I went and got the data in an effort to help @ron914 troubleshoot is misbehaving oil temp gauge. Oil was heated and a Fluke thermocouple meter was used to read oil temp. The resistance of the 200C sensor was measured both while heating and then on the cool down to get the hysteresis. The pictures I’m going to attach later in this thread were done with a late oil temp gauge. The gauge I used pretty much matched the Panorama calibration graphics. Here is the chart  Here is the raw data.  |
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| Superhawk996 |
Jun 18 2026, 02:21 PM
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#2
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914 Guru Group: Members Posts: 7,902 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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Just beginning - barely above ambient
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| Superhawk996 |
Jun 18 2026, 02:23 PM
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#3
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914 Guru Group: Members Posts: 7,902 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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Right around 212 as a boiling water cal point
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| Superhawk996 |
Jun 18 2026, 02:25 PM
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#4
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914 Guru Group: Members Posts: 7,902 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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300F close to red zone
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| Superhawk996 |
Jun 18 2026, 02:26 PM
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#5
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914 Guru Group: Members Posts: 7,902 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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Deep into red
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| 914Sixer |
Jun 18 2026, 03:40 PM
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#6
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914 Guru Group: Members Posts: 9,501 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region
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Late gauge your using should be 340 degrees at the the red point.
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| 930cabman |
Jun 18 2026, 03:41 PM
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#7
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Advanced Member Group: Members Posts: 4,713 Joined: 12-November 20 From: Buffalo Member No.: 24,877 Region Association: North East States
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Post #4 is showing 300F and the factory gauge just about to enter the red area.
I'm not liking this picture My 2056 build (2023) I added a capillary tube gauge measuring at the bottom of the sump. Hope I am missing something |
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| Superhawk996 |
Jun 18 2026, 03:45 PM
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#8
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914 Guru Group: Members Posts: 7,902 Joined: 25-August 18 From: Woods of N. Idaho Member No.: 22,428 Region Association: Galt's Gulch
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QUOTE(914Sixer @ Jun 18 2026, 05:40 PM)  Late gauge your using should be 340 degrees at the the red point. Generally agree The Panorama calibration graphics show start of red as 300F as I interpret it. I do see about 340F at the little line on midpoint of the red zone. Regardless, the gauge lacks numbers due to the variability and hysteresis (below 200F) that limits absolute gauge accuracy. It is intended as a directional, trend indicator not an absolute indication.  |
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