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PDL/CDi History Version 1.0: PDL1 to PDL4 Datalogger
PDL/CDi History Version 1.0: PDL5
PDL/CDi History Version 1.0: CDi2/PDL6, the PDL that Wasn't
PDL/CDi History Version 1.0:
PDL/CDi History Version 1.0: Pembina Lake Erie Datalogger
PDL/CDi History Version 1.0: P5 Switcher
PDL/CDi History Version 1.0: P7 Switcher
PDL/CDi History Version 2.0

PDL/CDi History Version 1.0: ZDL5 Switcher
PDL/CDi History Version 1.0: CDi3.FTe Switcher
PDL/CDi History Version 1.0: CDi3.RMe Switcher
PDL/CDi History Version 1.0: Remote 900 MHz RF Link
PDL/CDi History Version 1.0: CDi99 Libby Flow Meter
PDL/CDi History Version 1.0: Pembina Lake Erie Datalogger
Pembina Lake Erie Datalogger


  • Before the PDL, and prior to the end of 1995, there existed the "Pembina Lake Erie Datalogger" depicted at left. There were older and bigger devices even prior to the "PLED" but little evidence exists. There has been stories of big pods with huge car batteries and VHF transmitters in them, if someone has pictures or other info, please forward.
  • Adam had worked for PathTechnics in St. Catharines as a Technical Services Supervisor for all of 1989 and 1990. The Company had a patent on computerized datalogging equipment used in the Cathodic Protection Industry. The equipment was trademarked "MICAPS" and at the end of 1990 consisted of these three datalogger models. Unfortunately this Company went out of business at the end of 1990, so Adam founded SingleChips on April 18th, 1991 to continue with his datalogging work. He maintains to this day his business relationship with Robin Pawson, named as one of the inventors in the above patent, original founder of PathTechnics and eventual founder of Cybex Corp, the Christmas parties of which Adam is invited to, usually choosing to attend.
  • Above-mentioned MICAPS equipment in hand, Adam was hired in '94 to help assemble the Pembina "PLEDs", changed a few things in the process, and he is still at it.


  • Many people helped in many ways over the years to bring the datalogger project to where it is today. Some are:
  • A. Czyshun for pioneering this project way back, and for saying inspiring things like "strategic alliance", "joint venture", "single-transducer flowmeter", and the like. Thank you Andr√©.
  • D. Sparkes for getting really excited about plunger lifts, intermitters, offshore networks, doing presentations in Calgary, and writing SPE papers. Thank you Dan.
  • R. Erlandson for supporting this project and for tinkering with flow calculation spreadsheets. Thank you Russ.
  • D. Sorensen for flying all the way from Calgary to visit the SingleChips world headquarters backyard shed, and for keeping the sharks away. Thank you Dave.

Names and Things

  • "Loggerland" was coined by diver John A. Gallaugher, thank you John, and referred to the building on the left on the way in, just past the gate at the Port Maitland dock. After the lake sell-off in '97-'98 Loggerland moved to Mike's shop by the dock, by then devoid of Mike.
  • "PDL", shorthand for "Production Data Logger" was coined by J. Durish sometime in 1994, thank you John. The CDi was named by Adam in late 1998, following the Trustco fias... the Trustco experiment. PDL and CDi have since been virtually the same thing. A PDL is a CDi without a display/keyboard, a CDi is a PDL with a display/keyboard. The little "i" in CDi stands for "inspired" and was supposed to remind Adam about the "little people". It did. Eventually.

    PDL/CDi History Version 2.0: Background
1994 and 1995. Original datalogger on the left. Improved wiring version on the right.The black box on bottom left is a Multi plunger lift. The cream coloured thing next to it is the 8-bit-resolution datalogger. The green boards attached to the orange connectors are range amplifiers. They were necessary due to the very low resolution (8 bit) of the A/D converter in the datalogger. They required 24 Volts and that explains the 2, 12 Volt batteries wired in series.
1995. Loggerland1. Older 1994 datalogger on the left with point to point wiring, improved one with CPC quick-connects on the right.
1995. Datalogger production line at Loggerland1 in Port Maitland.
1994. Loggerland1 floor.
Winter 1994. Frozen dataloggers on Sarah deck.
Could be 1994-1998. Good thing there is a crane on this boat...
1997? Memory fails me but I think there were multi plunger lifts in the SS cylinders. The aluminum PDL is there to record flow.
1994-1995 Winter. Going out on the Sarah
Ian on the Sarah, 1994 - 1998.
Dale on the Sarah, 1994 - 1998.
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