| The Series 7 pressure sensors are for medium pressure ranges, and are the smallest, lightest isolated OEM-sensors available. They have a diameter of only 15 mm without compromising quality and performance. A high-sensitivity piezoresistive silicon chip is used for pressure sensing. The chip is protected against ambient influences by a stainless steel housing sealed with a concentrically corrugated diaphragm. The housing is filled with silicone oil for the transfer of the pressure from the diaphragm to the sensing component. All metal parts in contact with the pressure media are made of stainless steel AISI 316 L. The fully welded housing is vacuum-tight. The connecting pins allow direct PCB mounting or can be used for connecting cables. A Rugged Pressure Transducer The piezoresistive chip immersed in silicone oil is welded into a housing made of stainless steel AISI 316 L. High Sensitivity A nominal signal of 200 mV is obtained at a supply current of 1 mA for all standard pressure ranges. Flexibility Versions: Absolute and sealed gauge pressure. 6 nominal measurement ranges from 5 to 200 bar. Quality Each pressure transducer is subjected to comprehensive tests for its pressure response and temperature characteristics, and is delivered with an individual calibration certificate stating the characteristics as well as the results of all tests which were performed. Special testing is available if demanded by the customer. The Series 7 can also be delivered with a laser welded media isolation diaphragm (see data sheet Series 3 L - 10 L). The new technique for laser welding stainless steel diaphragms further improves the resistancy against crevice corrosion and still retains all the traditional performance, stability and quality for which KELLER is renowned. | 
