GreenFlow Co., Ltd. is a Korean manufacturer of water meters, flowmeters and measuring instruments.

They specialize in measurement and control systems, including mechanical meters, electronic meters, and smart‑monitoring devices. Located at 4 Sanbon‑ro 54beonan‑gil, Gunpo‑si, Gyeonggi‑do, Republic of Korea. The company began in 1990 as Samsung Measuring Inc. (SSMI) Co., Ltd. or 삼성계기공업 — as a Korean precision‑instrument manufacturer specializing in water meters, flowmeters, electronic meters, ultrasonic meters, and measurement control systems.

Their product portfolio includes:

- Water meters (eco‑friendly single‑jet & multi‑jet designs)

- Ultrasonic Flowmeters

- Equipment meters

- Remote monitoring & control devices (e.g., SmartFlow RTU systems)

- General measuring instruments

The company emphasizes cutting‑edge technology, modernization of testing and production facilities, and long‑term support of Korea’s national water‑resource infrastructure.