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Electronic flow and temperature measurement
Avoid longer cycle times and moulded part errors
Flow measurement

Flow measurement

Higher process reliability, better component quality and economic success in injection moulding through parameter monitoring of the temperature control.

Dirt, lime and rust

The causes can be in the form as well as on the periphery
Flow rate and temperature have a great influence on the production process and the component quality
During the course of the mould life cycle, dirt, lime or rust can clog the temperature control channels
This means that the temperature control effects determined in the mould design can no longer be achieved
Ultimately, this leads to longer cycle times and moulded part defects that cause avoidable costs
This makes it all the more important to check the process and the required parameters regularly in a target/actual comparison
Contaminated temperature control channels

Electronic measuring device

Enables precise measurement of flow rate and medium temperature
Use either in stand-alone operation or with data transmission to the machine via standardized M12 signal output
Usually, measurements are taken on the return flow of the mould in order to be able to draw conclusions about the causes in the event of deviations
Either the temperature control of the complete mould is monitored or only individual critical circuits
With the cleaning device PropNew temperature control channels can be cleaned
Flow meter

Automatic monitoring

Warning via built-in LED and transmission to machine
Besides the pure display of measured values, the device can also be used for the automatic monitoring of flow rate and temperature
By programming limit values, a warning can be issued when the value is exceeded or undercut
In stand-alone operation, an optical signal is indicated by the built-in LED
When connected to the injection moulding machine, all signals and actions common to the machine can be controlled
Display measured value flow rate litres per minute

Technical specifications

Suitable for toolmaking, maintenance and plastics processing
Medium: water and tempering oil
Pressure resistance: 40 bar
Flow rate:
Measuring unit: l/min and m³/h
Measuring range: 0.5 l/min to 25 l/min
Measuring steps: 0.1 l/min
Measuring unit: °C
Measuring range: -10°C to +100°
Measuring steps: 1°C
Digital display and M12 connection for machine communication
Flow measurement

scope of delivery

Extensive accessories for flexible application. Article No.: FL46502
1x sensor for measuring flow rate & temperature
Quick couplings NW = 9mm mounted at the inlet & outlet
2x double nipples nominal diameter = 9mm
2x adapter quick coupling for reducing to nominal diameter = 6mm
2x double nipples nominal diameter = 6mm
1x power supply unit
1x instruction manual
Practical plastic case
Other profiles and nominal diameters on request
Supplied in a practical plastic case with accessories


The FAQ’s for flow measurement

Which temperature control channel should be monitored?

Either the temperature control of the complete mould is monitored or only individual circuits are monitored if, for example, a critical channel (small cross-sections, many riser holes, channel length, etc.) is known.

Is the measuring instrument used on the flow or return line?

Usually, measurements are taken on the return flow of the mould in order to be able to draw conclusions about the causes in case of deviations. Changes inside the mould become visible. The measurement of the flow is usually covered by the temperature control unit, but if necessary the measuring device can also be used at the flow.

What can I do if the measured actual parameters do not correspond to the target values?

The determination of changed flow and temperature values is only the first step. It is crucial to react to them, analyse the causes and optimise them to ensure an ideal process again.
In order to make injection moulds with reduced flow values fit for production again, NONNENMANN offers with the cleaning devices of the series PropNew simple helpers for cleaning the temperature control channels.
NONNENMANN’s program also includes the leakage tester, with which tools can be checked for leakage in advance.

What can be the reasons for lower flow rates?

The causes can be found in the form as well as in the periphery. In the course of production and the mould life cycle, the temperature control channels can become clogged with dirt, lime or rust, depending on the water quality. This reduces the cross section and thus also the required flow of the temperature control system. As a result, the temperature control effects determined in the mould design are no longer achieved. Leaks in the hoses are also a possible source of error. Over the course of time, this leads to negative effects on the overall process, with longer cycle times and moulded part defects causing higher costs.

How is the measurement by the sensor performed?

The piston resting in the valve seat of the housing is lifted against the spring force by the flowing medium. The piston position is scanned by a magnetic field sensor and is output as an analogue signal. The spring force causes a safe return of the piston to the initial position when the flow decreases.

How is the measuring accuracy?

For flow monitoring, the accuracy is ± (4% of measured value + 1% of full scale).
For temperature monitoring, the accuracy is 3 K.

Which materials were used in the sensor?

Durch die Werkstoffauswahl, Edelstahl 1.4404 und FKM-Dichtungen, erfüllt das Messgerät die Anforderungen im Werkzeugbau, in der Instandhaltung und in der Kunststoffverarbeitung.


Ensure a stable production process in your injection moulding shop.

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Jochen Schwegler

Jochen Schwegler

Consultant Plastic Injection Molding/Mold Making/Project Planning

+49(0)152/09 01 11 63