I have a site with 450 mm (18 inch) Francis turbine housed in a pressurised
concrete water chamber (approx. 2.5 m x2.5 x 2.5m) and GE F650 bay
controller. Head varies between 9 and 6 m and I would like to measure and
use this head in control of the turbine guide vanes. I can easily install a
pressure sensor by drilling and tapping into the access panel of the chamber
about 0.5 m from the nearest guide vane.
I am concerned about the turbulence (although this may be averaged out).
Also, the spec I guess should be stainless steel, 4 - 20 mA o/p, 0-1 bar.
There appears to be a large differential in prices (see below from RS).
Regards,
Martin
******************************************************
Cable stock no. price each
Range Length 1+
0 to 5m WG 15 m 395-7101 € 336,00
0 to 10m WG 15 m 395-7117 € 336,00
0 to 20m WG 25 m 395-7123 € 379,00
Water head pressure equals 100mbar per metre which can be effectively
measured using submersible pressure transmitters in atmospheric tanks.
Output is proportional to level.
High accuracy
Easy installation
Measures tanks and boreholes
technical specification
Signal Output 4-20mA
Zero/Span Tolerance 0·1%
Supply Voltage 8 to 40Vdc
Operating Temperature -20°C to +85°C
Long Term Drift 0·15% of max span/year
Accuracy 0·15% FS
Max Overpressure 2 x FS
Rating IP68
*************************************************
GP Pressure Transducers/Transmitters:
One piece stainless steel body
Multipurpose, high performance
Temperature compensated, strain gauge technology
0-100mV output (transducers)
4-20mA output (transmitters)
0-5V output (transducers)
technical specification
Over working pressure 2 x range (x5 burst pressure) (max)
Accuracy ±0.25% (typ)
Excitation Voltage 10Vd.c. (0-100mV transducers)
6·5-35Vd.c. (0-5V transducers)
7·5-35Vd.c. (4-20mA transmitters)
Output (transducers) 0-100mV
0-5V
Output (transmitters) 4-20mA
Operating range -40 to +125°C (transducers)
-40 to +100°C (transmitters)
stock no. price each
transducers conn. (0-100mV) 1+ 6+
0-1 bar g 1/4 BSP 249-3864 € 132,50 € 127,00
0-6 bar g 1/4 BSP 249-3959 € 132,50 € 127,00
0-10 bar g 1/4 BSP 249-3858 € 132,50 € 127,00
0-25 bar g 1/4 BSP 249-3965 € 132,50 € 127,00
0-40 bar g 1/4 BSP 249-3836 € 132,50 € 127,00
0-100 bar g 1/4 BSP 249-3820 € 132,50 € 127,00
0-250 bar g 1/4 BSP 249-3971 € 132,50 € 127,00
0-400 bar g 1/4 BSP 348-8217 € 132,50 € 127,00
transmitters conn. (4-20mA)
0-1 bar g 1/4 BSP 249-3870 € 162,00 € 155,00
0-6 bar g 1/4 BSP 249-3943 € 162,00 € 155,00
0-10 bar g 1/4 BSP 249-3937 € 162,00 € 155,00
0-25 bar g 1/4 BSP 249-3921 € 162,00 € 155,00
********************************************************
**********************************************************
Kind Regards,
Martin
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