Take me home
PDL/CDi History: PDL1 to PDL4 Datalogger
PDL/CDi History: PDL5
PDL/CDi History: CDi2/PDL6, the PDL that Wasn't
CDi.P5
PDL/CDi History Version 1.0:

PDL/CDi History: Pembina Lake Erie Datalogger
PDL/CDi History: P5 Switcher
PDL/CDi History: P7 Switcher
PDL/CDi History Version 2.0

PDL/CDi History: ZDL5 Switcher
Zzzz...
PDL/CDi History: CDi3.FTe Switcher
PDL/CDi History: CDi3.RMe Switcher
PDL/CDi History: Remote 900 MHz RF Link
PDL/CDi History: CDi99 Libby Flow Meter
PDL/CDi History: P5 Datalogger, Line Controller, Methanol Injector, Plunger Lift, Gas Lift, etc., Controller
P5 Flowmeter
  • The PDL5 is also known as the "poor man's flow meter" as it uses a solenoid and a single pressure transmitter to switch between, and "read" both pressures across a camco box.
  • PDL5 development took place between 1999, with the CDi99, and 2009. There were no hardware changes to the board throughout this period. Development consisted of adapting the PDL to do different jobs such as methanol injector, line controller, gas lift, plunger lift, and implementing various pressure measuring technologies such as variable reluctance.
  • This effort ended in 2009 because implementing the Keller digital functionality would require an additional serial port and more program space, simply unavailable in the PDL5 hardware. So goodbye PDL5, and since the CDi2.P6 seat is taken, hello CDi3.P7.

April/May 2001. First Dry CDi99.P5, PM Station
April/May 2001. First Dry CDi99.P5, PM Station
April/May 2001. First Dry CDi99.P5, PM Station. Please note the worst possible transmitter was purposely used, so that it would change with temperature. The point is BOTH pressures change with temperature, differential value unaffected.
Winter 2001/2002. First Wet P5s, Susan Michelle
Winter 2001/2002. First Wet P5s, Susan Michelle
Winter 2001/2002. First Wet PDL5s, Susan Michelle
2003. First wire isolation method.
2005. Original solar  buoy...
2005. Original solar  buoy with some ice...
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