Low-cost thin film pressure transducer

✍ Scribed by K Rajanna; MM Nayak; R Krishnamurthy; S Mohan

• Publisher: Elsevier Science
• Year: 1997
• Tongue: English
• Weight: 571 KB
• Volume: 48
• Category: Article
• ISSN: 0042-207X
• DOI: 10.1016/s0042-207x(97)00013-4

✦ Synopsis

A flat diaphragm type pressure transducer with an anodised insulating layer and thin Pt-film as a strain gauge has been designed and made. Thepapergives details of the diaphragm and the information on the anodisation process employed. Sputtering was used for the deposition of the Pt-film strain gauge sensors. Observations on the behaviour of the transducer are presented which include, stability of the gauge resistance with pressure and time, linearity and hysteresis, and the insulation resistance of the anodised base layer. It was concluded that a/though this type of transducer can be adopted for measuring pressure in the lower range up to IO bars, creep effect was at a noticeable level in the output. However, the transducer is attractive for its low-cost and weight.