Piezoresistive OEM Pressure Transducers Series 7 S / 9 S
The
Series 7S / 9S is the latest development in media isolated
piezoresistive silicon chip pressure transducers. The new low mass
one-piece housing is smaller with a brazed stainless steel diaphragm for
lower production cost, giving excellent long-term stability combined
with easy installation.
The Series 7S / 9S can be installed into a housing using an O-ring seal,
or it can be welded. Welding should only be made to the flange at the
rear of the transducer. Performance specifications will remain
unaffected by the installation or welding process. The O-ring seal may
be fitted directly below the flange, or as a peripheral seal at the
front face of the transducer. The rear flange can be modified or
machined off completely where space is important.
|
 |
Series 7 S: ø 19 mm
Series 9 S: ø 21 mm
|
Excitation |
Constant Current
0,5 to 5 mA;
Specifications apply for 4 mA |
|
Pressure
Ranges |
0,2...200
bar (abs., gauge) |
|
Dimensions |
Height
5,5 mm (diameter see above) |
|
Linearity |
typ.
< 0,5 % FS |
max.
< 1,0 % FS |
| |
|
Comp.
Temp. Range |
0...50°C |
-10...80°C |
|
T.C.
of Zero |
<
0,1 mV / °C |
<
0,2 mV / °C |
|
T.C.
of Sensitivity |
<
0,01 % / °C |
<
0,03 % / °C |
|
Long
Term Stability typ. |
2
mV |
3
mV |
|
Signal |
Ranges:
0,2...1 bar: 400 mV / bar
Ranges: 2...200 bar: nominal 600 mV FS |
|
Note:
For best linearity, the full scale signal should be kept low. At 100
mV FS, linearity of 0,1% is realisable. For highest performance with
digital compensation, signals of 500...700 mV FS give best results.
Silicon sensors start to fail at 600 mV, most at 750 mV, with extremes
at 1000 mV at 1 mA excitation. |
|
