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Ritmo®033 metering pumps

The robustness and intelligence of a dosing with flexible mounting options, large adjustment range
and intelligent pressure sensors

Ritmo®033 metering pumps

R033 are the most demanding and user-friendly dosing pumps with their high functionality, their optimized discharge process of degassing media and their diverse control options With integrated pressure monitoring and volume flow measurement, they offer the highest level of process safety, work safety and automation capability in difficult and complex process development and chemical industry applications.


Ritmo®033 metering pumps, like the R032 pumps, are stepper motor driven diaphragm metering pumps with robust connecting rod drive, optimized dead space pump head, integrated venting valve and double ball valve technology. With their integrated pressure monitoring and volume flow measurement, they are also the high-end version for the most demanding dosing projects and the highest safety requirements. With their extremely large adjustment range up to 1: 3000, they cover a performance range of 2.5 ml / h to 30 l / h with 4 models.

2,5 ml / h – 30 l / h
4 – 16 bar

Materials Equipment

Their wide material range with PP, PVC, PVDF, PTFE and stainless steel pump heads ensures maximum chemical resistance the most versatile possible applications.

Especially in their full PTFE version, the dosing pumps are suitable for almost all aggressive fluids, acids, alkalis or solvents, for high-purity processes and metal-free applications. All fluid wetted components, i.e. the pumphead, ball valves, full PTFE diaphragm and fluid fittings are made from virgin ultrapure PTFE to ensure ultimate chemical resistance, maximum product purity and zero metal down to the ppb range.

Drive technology

The membrane deflection takes place with an electronically controlled stepper motor and force fit drive. The duration of the ejection process varies depending on the set dosing, while the intake stroke is always implemented at a constant speed.

The adapted control of the membrane speed to the dosing cycle optimizes the properties of the dosing pump in unique way

  • The constant, maximum stroke ensures lowest dead volumes, reduces the risk of outgassing of the medium and improves dosing accuracy.
  • Smooth, constant fluid output reduces pressure spikes in the pump and lines and increases the life of consumables.
  • The low-pulsation ejection process improves mixing at an injection port, in a mixer or in a reaction vessel

Device use

The pumps of the Ritmo®033 series are characterized by simple handling by means of a rotary / push wheel, intuitive user guidance and direct entry and display of the dosing rate in μl / min or ml / min.
The application parameters, dosing status and error statuses are displayed on a large color LC display. Different colors signal operating or fault conditions and ensure optimal visual monitoring of the operation of the pump.
It is possible to react as quickly as possible to fault conditions, operational failures and dangerous moments.

White - dosing pump in standby
Green - dosing pump works
yellow - Warning, dosing pump continues to work
Red - alarm, dosing pump is stopped


R033 dosing pumps have a wide range of operating options with resulting dosing properties
• Manual mode
• Quantity-proportional dosage (pulse or analog signal)
• Batch dosage (pulse signal, time interval, weekly timer)
• Automatic dosing head venting
• Anti-cavitation mode (50%, 25%)
• Calibration function
• Service menu
• Scalable analog signal input
• Freely programmable output relays

Fluid connections

The fluid connections are selected depending on the pump head design.

Stainless steel pump heads are used e.g. equipped with ¼ "internal thread into which standard cutting ring screw connections can be screwed.

PTFE pump heads are equipped with PTFE fittings with clamping and sealing ring in full PTFE in continuation of highest chemical resistance.

Installation flexibility

Maximum installation flexibility thanks to a universal mounting plate with click function for quick installation or replacement of the dosing pump is available for all models. For maintenance work, the pump is simply removed from the mounting plate and later snapped back into the mounting plate.

A rotating operating cube allows different installation situations in production plants, dosing stations or pilot plants without installing additional wall brackets.


R033 metering pumps have the following inputs and outputs as standard:
• Ext.Start / Stop
• Pulse signal
• Scalable analogue signal 0/4 - 20 mA
• 2-level level monitoring

• 2 programmable output relays for alarm / warning / operation / lifting signal
• Scalable analog output signal for pressure or flow
• Connection possibility for Profibus

Profibus communication

In an extended (optional) version, the dosing pump can be equipped or retrofitted with a Profibus communication box for remote control of all setting parameters. At the same time, the remote monitoring of the set parameters, including the causes of the error detected by the dosing pump, can take place.

With this equipment, the dosing pump for network communications is upgraded.

The E-Box is installed in the simplest installation by Plug & Play between the dosing pump and the mounting plate.

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