Direct Read In-Line and Panel Variable Area Flow Meters

Variable area flow meters (also known as rotameters) offer real-time, direct visual flow indication without complicated electronics. The “direct-read in-line and panel” style means you can mount them either inserted in the flow path (in-line) or on a panel for monitoring. These meters are ideal for liquids or gases where you need visual feedback, such as chemical dosing, calibration rigs, lab setups, or in small-scale processes. Their simplicity — no moving electronics or power required for basic visual readout — lends to reliability, minimal maintenance, and easy installation.

Key Features:

Clear flow tube with float / indicator for visual flow rate reading

Options for in-line installation and panel mounting for flexibility

Scale markings directly on body for quick readout

Variety of materials for wetted parts and tube (glass, acrylic, metal) to suit fluid type and pressure

Low pressure drop compared to many forced-flow devices

Minimal maintenance; mechanical simplicity