Special tide houses were constructed to shelter permanent water level recorders, protecting them from harsh environmental conditions. In this diagram, we can see how the analog data recorder (ADR) is situated inside the house with the float, and the stilling well located directly beneath it. Attached to one of the piers pilings is a tidal staff. Essentially a giant measuring stick, this device would allow scientists to manually observe the tidal level and then compare it to the readings taken by the analog recorder.
Older tide house diagram

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