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The RA33 Batch Controller provides precise sensing and dispensing of liquids into a container or process vessel in food, chemical, pharmaceutical, oil and gas, and other process industry applications.

It monitors flow, temperature and density; controls valves and pumps; and dispenses the exact amount requested by the programmed recipe.

The controller can work with a single valve and pump in automatic or manual mode, or with two valves for two-stage batching.

Two RA33 controllers can work together for batch mixing of two ingredients.

The RA33 calculates the exact volume to be dispensed based on an analogue or pulse signal from a flow sensor and its built-in temperature/density compensation functions.

For example, mineral oils can be corrected according to the ASTM D1250-04 standard.

The volumes of other media can be corrected using expansion coefficients, or the volume can be converted to mass by measuring the density.

The RA33 makes an automatic after-run correction for constant and extremely accurate results, and advanced error diagnostics detect leakage, fill deviation and “no flow” conditions.

It has a compact housing for wall, panel or DIN rail mounting, making the device usable in all environments.

The RA33 works in ambient temperatures of -4 to 140F, has an IP65-rated front panel and the housing meets IP66 and NEMA 4X requirements.

The RA33 accepts inputs from flow, temperature, pressure and density sensors.

Outputs can control two valves and two pumps, and it has up to four digital outputs for one- or two-stage valve control or for the control of other devices such as signal lamps.

The RA33 also has optional USB, RS485, Ethernet, and Modbus TCP and RTU interfaces for communications with an external control system or PC.

The RA33 Batch Controller has a multi-line, backlit LCD with selectable operating languages.

A simple and quick configuration can be carried out on site via buttons, or with the help of a USB interface and Endress and Hauser Fieldcare software.

Its functions include recipes and safety settings, such limiting the preset counter entry to a maximum allowable value.

The RA33 Batch Controller is also available pre-programmed.

Predefined universal inputs support simple and quick commissioning, and are suitable for connecting to and powering all commonly used flow sensors, pressure transducers, temperature sensors and density sensors.

The RA33 Batch Controller has a logbook for batch reports and an event logbook, and it maintains statistics regarding the number of fillings and filled quantities for day, month and year.

For direct documentation, a printer can be connected to the serial interface of the RA33 and a printout of the batch report can then be automatically initiated at the end of each filling process.

Using Endress and Hauser Field Data Manager Software, the stored batch reports, events and the device configuration can be read out automatically and stored tamper-proof in an SQL database.

If the RA33 is connected using Ethernet, customers can use the built-in web server to read out measurement data, calculated values and device data using a standard web browser.

Because the web server is built-in and because access is via a browser, there’s no additional software to be installed on a PC or other device used for data monitoring.


Endress+Hauser is a global leader in measurement instrumentation, services and solutions for industrial process engineering. With over 8,000 employees worldwide, the Group generates annual net sales of more than Euro1.1 billion.

The Endress+Hauser Group

Endress+Hauser is a global leader in measurement instrumentation, services and solutions for industrial process engineering. The Group employs 13,000 personnel across the globe, generating net sales of more than 2.1 billion euros in 2015.
With dedicated sales centres and a strong network of partners, Endress+Hauser guarantees competent worldwide support. Production centers in 11 countries meet customers’ needs and requirements quickly and effectively. The Group is managed and coordinated by a holding company in Reinach, Switzerland, with UK headquarters in Manchester. As a successful family-owned business, Endress+Hauser is set for continued independence and self-reliance.
Endress+Hauser provides sensors, instruments, systems and services for level, flow, pressure and temperature measurement as well as analytics and data acquisition. The company supports customers with automation engineering, logistics and IT services and solutions. Our products set standards in quality and technology.
We work closely with the chemical, petrochemical, food & beverage, oil & gas, water & wastewater, power & energy, life science, primaries & metal, renewable energies, pulp & paper and shipbuilding industries. Endress+Hauser supports its customers in optimising their processes in terms of reliability, safety, economic efficiency and environmental impact.
Founded in 1953 by Georg H Endress and Ludwig Hauser, Endress+Hauser has been solely owned by the Endress family since 1975. The Group has developed from a specialist in level measurement to a provider of complete solutions for industrial measuring technology and automation, with constant expansion into new territories and markets.

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