River Gauge
A modular, low-cost flood monitor designed for Maine’s harsh year-round climate.
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Overview
Leading development of a resilient river-monitoring system for remote deployment.
As Mechanical Technical Lead, I led five engineers in developing a modular, low-cost river gauge for long-term flood monitoring in Maine.
System
Flood-monitoring hardware must operate reliably in submerged and shore-side conditions through a demanding seasonal climate.
Design Focus
Our mechanical architecture was driven by weather exposure, ice, debris, sediment, variable terrain, waterproofing, installation, maintenance, and ME/ECE integration.
Technical Work and Learnings
Environmental Survivability Challenge: Maintain accurate water-level measurements despite debris, sediment, ice, flooding, and varying riverbed conditions. Solution: Fixed the submerged pressure sensor at a known reference height inside a low-profile protective assembly designed to reduce snagging, drag, and burial risk. Learning: Environmental loading directly drives sensing architecture. Sensor accuracy means little if its physical reference position cannot be maintained. Weatherproof Electronics Challenge: Protect electronics from rain, condensation, temperature cycling, and long-term outdoor exposure while still allowing pressure equalization and cable access. Solution: Integrated gasket compression, cable glands, atmospheric venting, epoxy-sealed interfaces, insulation, and serviceable enclosure penetrations, then validated seals through water testing. Learning: Waterproofing is an interface problem. Gaskets, fastener preload, tolerances, vents, and cable penetrations are often more critical than the enclosure walls themselves. Anchoring & Installation Challenge: Secure both wet and dry assemblies across inconsistent soil and riverbed conditions while keeping installation practical for a small field team. Solution: Developed an adjustable structure using duckbill anchors, penetrative river anchors, chains, turnbuckles, quick links, and modular framing, with load testing and a defined installation sequence. Learning: Installation is part of the product architecture. Anchoring geometry determines repeatability, sensor positioning, serviceability, and whether a design actually works outside the lab. Sensor + RF Integration Challenge: Integrate a vented 4–20 mA pressure sensor and LoRa telemetry without letting mechanical packaging compromise sensing or wireless performance. Solution: Coordinated sensor cable routing, atmospheric reference, analog signal conversion, antenna placement, PCB packaging, and mechanical mounting while validating transmission range in the deployment environment. Learning: Mechanical packaging can become an electrical design constraint. Antenna clearance, cable routing, enclosure geometry, power requirements, and sensor interfaces have to be solved as one system.
