When an air flow meter is unnecessary and simple visual indication suffices, these robust Sight Indicators excel. Their sturdy design and high-temperature resistance, along with a glass dome, ensure effortless visual verification.

A plastic sight air flow indicator or flow meter typically comprises a transparent plastic tube with inlet and outlet ports. Inside, a float or ball moves with the airflow. As air passes through, the float or ball rises, indicating airflow presence and rate. The float or ball’s position in the tube corresponds to the flow rate, with higher rates causing greater elevation. Users can visually inspect the float or ball’s position through the transparent tube to monitor airflow. This straightforward design enables easy airflow monitoring in various applications, offering visual indication without external power sources or complex instruments.

What is Air Flow Meter?

Flow indicators can be used to confirm visually whether or not there is flow or no flow by observing the movement and rotation of the built in “paddle” which is very useful in situations where it is difficult to ascertain if there is a flow e.g. In a clear liquid. The rising ball type is normally used on gas or air applications where the ball will rise when there is positive flow.

A plastic sight air flow indicator or flow meter typically consists of a transparent plastic tube with inlet and outlet ports. Inside the tube, there’s a float or a ball that moves with the flow of air. As air flows through the device, it causes the float or ball to rise, thereby indicating the presence and rate of airflow. The position of the float or ball within the tube corresponds directly to the flow rate; higher flow rates cause the float or ball to rise higher. Users can visually inspect the position of the float or ball through the transparent tube to gauge the airflow. This simple design allows for quick and easy monitoring of airflow in various applications, providing a visual indication of airflow status without the need for external power sources or complex instrumentation.”

Type of Air Flow Meters

Plastic Sight Flow Indicator

Description:

  • 1/4 inch to 1 inch BSP/NPT connection
  • Easy to install in any position
  • No special piping or connections required
  • Robust with good shock and vibration resistance
  • Resistant to a wide range of chemicals
  • Temperature – 80°C (maximum working temperature)
  • Pressure – 40 bar (maximum working pressure)

APPLICATIONS:

The Plastic Sight Flow Indicator is a robust, low-cost industrial class flow indicator that is simple to install. It can be mounted in any position from vertical to horizontal without any special connectors or plumbing. 

Constructed of high impact polycarbonate plastic, this product offers excellent structural integrity and compatibility with a wide range of industrial chemicals. The transparent polycarbonate plastic body allows visual inspection of the fluid condition as well as viewing the centrifugal movement of the internal impeller.

Rising Ball Flow Indicator

Description:

  • Designed and manufactured in the UK
  • Robust with good shock and vibration resistance
  • Short lead times
  • No routine maintenance required
  • 8 – 25mm (1/4” to 1 ½”) connections available
  • Unrivalled flow and pressure drop performance
  • Bi-directional flow
  • Operates over a wide flow range 

APPLICATIONS:

The Rising Ball is supplied in stainless steel or bronze to be used on pipe sizes from 8mm to 40mm (¼” to 1 ½”).

The PTFE ball rises as the flow starts becoming clearly visible.

The indicator must be installed horizontally with the glass dome positioned upwards.

Ball & Spinner Flow Indicators for Liquid/ Gas

Description:

  • Designed and manufactured in the UK
  • Robust with good shock and vibration resistance
  • Short lead times
  • Easy to install in any orientation
  • No routine maintenance required
  • 8 – 25mm (1/4” to 1 ½”) connections available
  • Unrivalled flow and pressure drop performance
  • Bi-directional flow
  • Operates over a wide flow range 

APPLICATIONS:

The Flow-mon Spinner Indicator is a cost effective and robust flow indicator that is simple to install and will outperform other spinner instruments by a considerable margin.

This spinner design can be mounted both horizontally and vertically, offering bi-directional flow indication with low pressure losses.

With a tough construction, this product offers excellent structural integrity and compatibility for a wide range of applications. 

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