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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. 
  
    |   | 
    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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