By Minco Staff
Porsche cars have a unique system of model numbering. The high-performance, rear-engine 911 was followed by the economy, mid-engine 914 co-developed with Volkswagen. A few years later, Porsche introduced the front-engine, eight cylinder 928 luxury tourer. The numbering system makes no apparent sense. Actually, a Porsche model number is taken from the blueprint number of the model’s original drawing and follows that model through its entire life. That’s why entirely unrelated Porsche models could, in theory, have consecutive model numbers. All Porsche model numbers tell you is the order in which the various models were conceived.
- An embedment type resistance temperature sensor (base model number S331)
- It has a 100-ohm platinum sensing element with a .00392 TCR (PA)
- It has three leads (3)
- It has TFE lead insulation (T)
- Its lead length is 120” (120)
- It includes a retaining ring and spring for mounting in a hole (AC1)
The same base model is available in a variety of configurations. Each can be specified by changing characters in the model number. For example, if the “3” following PA were changed to “4”, it would specify four leads instead of three. If the “T” were changed to “S”, it would change the lead insulation from plain TFE to TFE with stainless steel braid.