Type VEG Calorimetric flow monitors Separate design with separate switching transmitter 0.1...1707 l/min (water) 0.4...3414 l/min (oil) / DN 15...150

Calorimetric flow monitor – Separate design with external switching transmitter

Type VEG

• Wear-free flow monitoring: No moving parts in the medium

• High sensitivity: Switching point can be set even at very low flow rates

• Robust construction: High pressure resistance for industrial applications

• Flexible integration: Suitable for pipes with different nominal diameters

Description

The VEG calorimetric flow monitor is used for reliable monitoring of volume flows in liquids. Thanks to its robust design and precise measuring method, the sensor is particularly suitable for applications in industrial plants, cooling circuits, and technical process systems.

Typical areas of application include, for example:

• Dry-running protection for pump systems

• Monitoring of lubrication circuits

• Inspection of cooling and heating systems

• Leakage monitoring in pipelines

The flow sensor is screwed directly into the process line and can therefore be easily integrated into existing systems. Different probe lengths enable use in pipes with different nominal diameters and wall thicknesses.

In contrast to the compact design, the VEG type has the evaluation electronics in a separate switch transmitter, which is installed separately from the sensor. This makes this variant particularly suitable for applications with elevated temperatures, measuring points that are difficult to access, or special installation requirements.

Measuring principle

The sensor operates according to the calorimetric measurement method, which uses a temperature difference to determine the flow velocity. The measuring probe contains two temperature sensors with optimal thermal contact to the medium.

One sensor is constantly heated, while the second sensor measures the current temperature of the medium. When the medium is at rest, a stable temperature difference between the two sensors is established.

As soon as fluid flows through the pipe, the heated sensor is cooled by the medium. The resulting change in temperature difference depends on the flow velocity and serves as the basis for monitoring the set minimum flow rate.

signal processing

The recorded measurements are transmitted to the external switching transmitter and evaluated there. If the flow rate falls below the set limit value, the system generates a corresponding output signal for further processing in control or monitoring systems.

Thanks to its wear-free measuring method without moving components, the flow monitor is characterized by high operational reliability, minimal maintenance, and a long service life.