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When it is desired to get real-time data and communicate with Leveloggers without removal from the water, they can be deployed using direct read cables.
The lower end of the direct read cable has a miniaturized infra-red optical reader. The top cap of the Levelogger is removed and the direct read cable is threaded in its place. In turn, the upper end of the cable is attached to a portable computer or Leveloader, via a USB or RS232 PC Interface Cable. This allows viewing of the data, downloading and/or programming in the field.
Leveloggers can also be connected to an SDI-12 datalogger using the Solinst SDI-12 Interface Cable attached to a direct read cable.
The full benefits of a sealed Levelogger with no vent tube or electrical cable connection are also maintained. The logger is still sealed from all electrical interference through a Faraday cage design. Cable handling problems are minimized.
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Levelogger connected to
Direct Read Cable |
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PC Interface Cable and
2" Wellcap and Cover |
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PC Interface Cable connected
to the Direct Read Cable |
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Enviro CapTM lockable cap
and key used with Wireline
and Hooks |
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Direct read cables are available for attachment to any Levelogger, new or old, in standard lengths of: 50', 100', 200', 250', 300' and 15 m, 30 m, 60 m, 80 m, 100 m. Custom cable lengths up to 1500 ft. (450 m) are also available to fit particular monitoring situations, as required. Cable markings are available upon request.
The 1/10" dia. (2.54 mm) coaxial cable has an polyethylene outer jacket for strength and durability. A stranded stainless steel braided conductor gives non-stretch accuracy.
The upper end of the direct read cable is fitted with a connector that can act as a well cap for a 1" well. This connector fits Solinst Levelogger well caps designed for 2" or 4" wells, and can easily be tethered at surface in other situations.
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Leveloggers may also be suspended in the water on a stainless steel wireline or Kevlar® cord.. This is a very inexpensive method of deployment, and if in a well, allows the Levelogger to be easily locked, out of sight and inaccessible to anyone without a special key.
Solinst has adapted the Enviro Cap™ by adding a vent hole in the cap to allow for the equalization of barometric pressure in the well. The well cap has a convenient eyelet from which to suspend the Levelogger. It slips into the casing and is locked in place with the tamper-proof key, as shown.
The Enviro Caps are available sized for 2" and 4" wells. Well caps for other sizes of well can also be used.
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® Kevlar is a registered trademark of DuPont Corp.
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