🏛️ Fábrica de Medidores do Porto — Porto Norte Region, Portugal Fábrica de Medidores do Porto, active from the 1930s–1960s, produced brass single‑jet and multi‑jet water meters for northern Portuguese municipal networks. Known for rugged castings and “MEDIDORES DO PORTO” calibration plates, the workshop represents early Portuguese metering heritage before JANZ’s national dominance. Fábrica de Medidores do Porto (Porto Meter Factory).

This workshop represents the northern counterpart to Barcelense (Barcelos), forming part of Portugal’s pre‑JANZ metering landscape.

🧭 Historical Overview

Period Development

1930–1940 Founded as a brass‑machining workshop; produced domestic meters for Porto’s growing water network.

1940–1955 Expanded production; supplied meters to Vila Nova de Gaia, Matosinhos, Maia, and rural cooperatives.

1955–1965 Peak output; introduced improved impeller assemblies and Portuguese‑standard registers.

Post‑1965 Decline as JANZ (Lisbon) and imported Spanish meters became standard; workshop absorbed or closed.

🏭 Meter Production

- Single‑jet brass domestic meters

- Multi‑jet meters for municipal networks

- Cold‑water meters for Douro‑fed supply systems

- Industrial meters for factories and cooperatives

- Brass unions, couplings, and seals