Abstract: An apparatus for automatically measuring a fluid level beneath a manhole or the like, including a depth gauge supported by a support bracket, having a seat, which clamps to the inner rim of a manhole. The depth gauge is of the reflected microwave type, including transmitting and receiving antennas which fit into the seat of the support bracket.

Abstract: Apparatus for emptying successive sample containers, by inverting the containers, one at a time, draining the contents of each container, washing, again draining each container and restoring each container to its initial position. Each container is held in a holder mounted for rotation in a vertical plane about a hinge near the bottom of the holder. A hook is adapted to engage a holder and pivot about a separate hinge bringing the holder and its container to an inverted position where a nozzle sprays washing fluid into the inverted sample container. After draining, the sample container is restored to an upright position.

Abstract: An intake channel pre-conditioner for a fluid sampler wherein prior to fluid sampling, fluid is drawn from a fluid body to be sampled by a pressure source communicating with the channel. The drawn fluid is passed along most of the length of the intake channel and then expelled by the pressure source.