Figure 5.

Environmental housings for Cave Pearl loggers. Surface logger: (a) Drip-sensor unit with a “Charlotte” brand translucent knock-out plug, which is solvent welded to the top of a 4 inch PVC end cap. A flexible rubber end-cap with a standard pipe clamp completes the housing with a water-tight seal. (b) Inside-view of the drip-sensor lid, showing a circular cutout of the original PVC end cap with the accelerometer mounted on the inside of the knock-out plate. A tri-color LED is mounted on the PVC so that it is visible through the translucent surface. Submersible logger: (c) Complete submersible housing made from 2 inch pipe fittings. Nylon bolts hold the body together, compressing the central O-ring seal. (d) Outside view of the submersible housing end cap. An RGB indicator LED is potted with transparent epoxy inside the grey ½ inch threaded connector. (e) Inside view of the sensor cap showing the plumber’s putty used to plug the housing penetration so that liquid epoxy could be poured around the LED. WS Deans’ 1241 micro connectors link wires from the sensor caps to the logger platform.