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Thread: "SHORT" SWEEP/"FULL" SWEEP GAUGE SENDING UNIT

  1. #1
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    "SHORT" SWEEP/"FULL" SWEEP GAUGE SENDING UNIT

    sending unit for an early sun blue-line water temp gauge. these are 100-260, short sweep gauges. these sending units are hard to find. so, would an auto-meter full sweep sender work on a short sweep gauge? auto meter has a full sweep gauge. thanx!

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    Doubtful. The sending unit has nothing to do with sweep.

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    some sending units are described, short or long. i just did`nt know. thanx.

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    Registered Member BamaNomad's Avatar
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    I'm in agreement with Rick on this. Automotive gauge display should be independent of sensor. The sensor probably provides a varying signal to the gauge which ranges from ~ 100F up to ~280F regardless of the gauge used.

    The gauges though vary in what they display to you. Some short sweep gauges may only display 'Cold / Normal / Hot' ranges, but if you want to monitor temperature more closely you desire to see something closer to actual temperatures on your gauge face (ie. from 100 F to 280). A full sweep gauge gives you the most 'resolution' as to the real temperature of the engine (although you should not interpret that as being super accurate!).. it's still better IMO to have a full sweep gauge in terms of 'readability' and learning the repeatability of the engine situation.

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    i mean, if the gauge numbers are the same, "sun blue-line" and "autometer" both gauges read 100_260, should`nt the sender work from autometer? i read something about "ohms" have to match.

  6. #6
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    i read something about "ohms" have to match.
    That's what needs to match. How far the gauge needle swings is not determined by the sensor, but by the construction of the gauge itself.

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    just sawan article about this. the sender`s ohms, must match the gauge.

  8. #8
    Registered Member Old Buzzard's Avatar
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    True.
    Basically, a gauge like that, is a voltmeter. The face is made to display the info intended.
    The sender raises/lowers, the ohms resistance, to make the gauge read.

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