You can use TURCK flow meters/monitors
http://www.clrwtr.com/Turck-Flow-Sensors-Monitors.htm
& Weidmuller signal conditioners.
http://www.clrwtr.com/Weidmuller-Waveanalog-20LP-Signal-Conditioners.htm
I think they are less expensive than what your budget is. I'm not sure who makes a good pwm...
The top 2 soft starts that I've used are ABB & Saftronics. I think Saftronics changed their name to Emerson/Control Techniques now.
http://www.clrwtr.com/ABB-PST-SoftStarters.htm
http://www.clrwtr.com/Saftronics-Soft-Starters-SoftStart.htm
I think they all have a built-in bypass contactor now...
Are you using an ABB PLC or a third party (AB) PLC? If it is an ABB PLC look at the .pdfs on this page. It may help you find the answer.
http://www.clrwtr.com/ABB-PLC-PLCs.htm
Have you looked at TURCK or SUNX pressure sensors.
http://www.clrwtr.com/Turck-Pressure-Sensor-Sensors.htm
http://www.clrwtr.com/Sunx-Pressure-Sensor-Sensors.htm
Not sure about their pricing tho.