vGauge Remote Sensor Units
support several types of resistive temperature senders in different case styles,
Senders vary resistance with changes in temperature
usually with resistance decreasing as temperature rises. A pull up circuit
supplies the bias voltage via a single wire with the ground return path via
sender body to system ground. In some cases, a separate ground terminal can be
ordered for isolated ground systems
The main difference between senders is temperature
range with operational ranges from 60F - 250F and 100F-350F the most common.
These versatile senders are used for Engine Coolant, Water tank, Transmission
OIL, Heat Exchangers, and more.
Resistive senders are effected by long wire runs
which can increase the overall load. With max temperature resistance in the
20-40 Ohm range, the effect of lead resistance can become noticeable. These
effects can be easily compensated via adjustments in calibration tables. Another
effect of resistive senders is no-linear response curves which can cause very
quick changes at end of operating ranges. Calibration tables can help reduce
some of these effects.
Some common senders available are listed with
associated calibration tables.
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Fahrenheit |
Celsius |
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VDO #323-095 (stamp 801/5/1)
1/8" -27 NPT 250F/120C Standard body ground |
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VDO #323-420 (stamp 801/1/9)
1/4" -18 NPT 250F/120C Standard body ground |
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VDO #323-093 (stamp 801/1/10)
1/2 -14 NPT 250F/120C Standard body ground |
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VDO #323-477 (stamp 801/1/7)
1/4" -18 NPT 250F/120C Floating body ground |
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VDO #323-050 (stamp 801/13/1)
1/8" -27 NPT 400F/200C Standard body ground |
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ISSPRO #R8923 1/8" -27 NPT
240F/120C Standard body ground |
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ISSPRO #R8923-03 1/8" -27 NPT
240F/120C Floating body ground |
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ISSPRO #R8922 1/4" -18 NPT
240F/120C Standard body ground |
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ISSPRO #R8920 1/2" -14 NPT
240F/120C Standard body ground |
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ISSPRO #R8959 1/8" -27 NPT
320F/180C Standard body ground |
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ISSPRO #R8959-03 1/8" -27 NPT
320F/180C Floating body ground |
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