Flow Meters, Indicators and Switches

Close-up of RotorFlow RFS flow sensor. The sensor features a brass body, clear rotor housing, internal rotor, and electrical connection cable.

Visual Flow Indicators & Monitors

Clamp-on Ultrasonic Flow Meters

FS8-W Series general purpose flow switch. McDonnell & Miller flow switch with a black top and brass fittings for fluid flow detection.

Flow Switches

Siemens flow meter. SITRANS FM MAG 5100 W electromagnetic flow meter with flanged connection, white industrial equipment, and digital display.

Inline Electromagnetic Flow Meters

Flow Meters, Indicators, and Switches

In countless industrial processes across Australia, accurately monitoring the movement of liquids and gases is essential for efficiency, safety, and performance. Zedflo provides a comprehensive range of flow meters, indicators, and switches designed to deliver precise, reliable data for your systems. Whether you require accurate volumetric measurement for billing, simple visual confirmation that a line is active, or an automated switch to protect pumps and equipment, we offer high-quality, industry-proven instrumentation to meet your needs.

What Are Flow Meters and How Do They Work?

Flow meters are devices used to measure the linear, nonlinear, mass, or volumetric flow rate of a liquid or gas. They operate using a variety of physical principles — some detect the speed of the fluid (velocity type), others measure the displaced volume (positive displacement), and some calculate the force of the flow (differential pressure). Each technology offers unique benefits depending on the application and medium.

What is the Difference Between a Flow Meter, Indicator, and Switch?

A flow meter provides continuous measurement of the amount of fluid moving through a system — for example, 50 litres per minute — making it ideal for process control and billing applications.
A flow indicator (or sight glass) offers a simple visual confirmation that flow is occurring, usually via a spinner or flap, but it does not provide a numerical reading.
A flow switch acts as a safety device that triggers an electrical contact at a pre-set flow rate. It is commonly used to shut down pumps or systems automatically if flow stops, helping prevent equipment damage.

What Are the Main Types of Flow Meters?

Variable Area (Rotameters): Simple mechanical devices requiring no external power, suitable for monitoring both gases and liquids.
Electromagnetic (Mag Meters): Designed for conductive liquids such as water or slurry; contain no moving parts and are highly durable.
Positive Displacement (PD) Meters: Ideal for viscous fluids such as oils and fuels, offering exceptional accuracy.
Ultrasonic Flow Meters: Clamp-on designs that provide non-invasive measurement without cutting into the pipeline.

How to Choose the Right Flow Device

When selecting a flow measurement solution, consider factors such as the type of fluid (clean, dirty, or corrosive), viscosity, flow range, and pipe size. It’s also important to determine whether you need a local display, a 4-20 mA output for PLC integration, or a simple alarm switch for safety control.

Find the Right Flow Solution Today

Flow measurement can be complex — but Zedflo makes it simple. Our experts can help you choose the ideal flow meter, indicator, or switch for your application. Contact us on 08 9302 1266 to discuss your requirements and find a reliable, cost-effective solution tailored to your needs.