Keys to choosing your media preparator

The 12 questions to ask before purchasing a media preparator.
Keys to choosing your media preparator

The 12 questions to ask before purchasing a media preparator.

A culture media preparator is a professional equipment specially designed to produce small or large quantities of culture media in microbiology and plant tissue culture laboratories. Its purpose, as the name implies, the preparation of high quality sterile culture media to which samples will be cultured for microbiological analysis, in the case of microbiology laboratories, or grow explants in the case of labs dedicated to plant tissue culture.

When considering purchasing a media preparator for your laboratory, it is crucial to assess its capabilities and to determine the level of after-sales service provided by the manufacturer, both prior to and following the acquisition.

In the following article, we will detail the key aspects to take into account when purchasing a media preparator for your laboratory. As one can imagine, here at RAYPA, we are eager to highlight the benefits of our AE-MP Series media preparators. This is because, in addition to our belief in their quality, efficiency and profitability, we have a thorough understanding and knowledge of these culture media preparators. Shall we start?

Why should I purchase a media preparator?

Preparador de medios Serie AE-MP de RAYPA.

Purchasing a media preparator represents a major investment. And while the investment typically yields a return in a relatively short amount of time, it nonetheless represents a substantial financial commitment. Therefore, it is important to consider the following questions before acquiring one:

1. Why does my laboratory need a culture media preparator?

It is possible that in your laboratory you produce culture media in large quantities manually, using an autoclave, and you do this process multiple times a week. If you are familiar with the process of preparing culture media, you are aware of its demanding nature in terms of labor, time consumption, staffing needs, and inherent risks. With over 15 years of experience in the field, we at RAYPA understand the challenges associated with manual media preparation. Many laboratories, similar to yours, have sought our guidance in automating this process to improve efficiency, reduce time consumption, and minimize the risks involved. Our extensive knowledge and expertise in media preparators have allowed us to provide insightful advice to numerous laboratories. As a consequence, you will experience significant time and cost savings, enhance the quality of your processes, reduce the possibility of human error, and minimize the risks of workplace accidents.

For this reason, we believe that we must be very clear and concise. RAYPA’s AE-MP Series media preparators allow you to carry out, in a single equipment, the 4 main phases of culture media production (preparation, sterilization, cooling and dispensing). As a result, the operational workflow will be optimized, the risk of contamination will be reduced, the total process time will be shortened, and large volumes of sterile culture media will be obtained, thanks to its efficient heating system and rapid cooling phase at the end of the sterilization process.

2. What types of culture media can I prepare?

Tipos de medios de cultivo que se pueden elaborar al comprar el preparador de medios.

The media preparator allows the production of all sorts of liquid and solid culture media, and some of the most common applications include Agar, buffer solutions and lysogeny broth.

With our media preparator you can prepare any type of culture media with any composition. In addition, it can prepare recipes with thermolabile nutrients or antibiotics thanks to the dispensing port installed on the cover, allowing the dispensing of these components after finishing the sterilization phase, avoiding the exposure of these compounds to temperatures higher than 70ºC. Additionally, the ability to program different temperature segments during the preparation process is a noteworthy feature, as it enables the preparation of more complex media recipes, such as Chocolate Agar.

Among the principal applications utilized by our customers, we observe the preparation of culture media for plant tissue culture, the preparation of Agar for qualitative microbiological analysis, and the preparation of lysogeny broth and buffer solutions for quantitative microbiological analysis.

3. What is the achievable productivity? How long does a cycle take?

As you can imagine, it is difficult for us to give you a concrete answer to this question because the duration of a cycle and the level of productivity will depend on the model of media preparator in question. As a rough guide, we can tell you that a complete cycle can last anywhere between 70 and 125 minutes. If you are concerned about this aspect, we have overpowered models with up a heating capacity of up to 30kW of electrical power that significantly shorten the duration of the heating phase, so shorter cycles can be performed.

In terms of productivity, i.e. the liters of culture medium that can be prepared per cycle, it can range from 5 to 90L, depending on the model of media preparator chosen.

Media preparator model
Media preparation capacity* min. – max. L
AE-20-MP-10L
2 – 8
AE-20-MP
2 -18
AE-40-MP
5 – 36
AE-60-MP
10 – 54
AE-80-MP
20 – 72
AE-100-MP
20 – 90
*The minimum volume capacity mentioned is by working by F0. When working with chamber temperature, the minimum volumes will be larger. Consult our technical service for further details.

On the other hand, another key aspect is the dispensing speed at the end of a cycle, which in the case of the our media preparator ranges from 7ml/s to 94ml/s, depending on the chosen dispensing mode.

4. What size of media preparator does my laboratory need?

Dimensiones Media Preparators Icon Blue Keys to choosing your media preparator
Exterior dimensions L x D x H (mm)
Min Capacidad Media Preparators Icon Blue Keys to choosing your media preparator
Minimum culture media preparation capacity* {min. by F0} (L)
Max Capacidad Media Preparators Icon Blue Keys to choosing your media preparator
Maximum culture media preparation capacity (L)
Sobremesa Media Preparators Icon Blue Keys to choosing your media preparator
Type (benchtop)
Vertical de pie Media Preparators Icon Blue Keys to choosing your media preparator
Type (vertical floor-standing)

We offer a range of 6 models with varying capacities, ranging from a minimum capacity of 10 liters to a maximum chamber size of 100 liters. The most important factor when purchasing a media preparator and deciding on one model or another is your production needs. It is important that, in addition to your current needs, you also consider your future needs.

On the other hand, there are 3 other aspects to consider before choosing a model and configuration: electrical and water connection requirements, available space and the consumption of resources such as electricity and water.

5. What options are available for dispensing the culture medium?

To choose the appropriate dispensing mode you must first know what volume of medium you need to dispense per container. In the case of petri dishes, the laboratory operator can dispense the prepared and sterilized medium through an integrated peristaltic pump that is controlled by means of a foot pedal. Also, the execution of each filling can be programmed with a time delay.

In addition to this integrated peristaltic pump, all our models include a set of 2 dispensing lines of different diameters out of a total range of 5 (Ø3.2 4, 4.8, 6.4 and 8 mm). And, if you wish, you can add a second peristaltic pump to your unit in order to double the flow rate. Depending on the diameter of the chosen dispensing lines and the number of peristaltic pumps your media preparator has, the dispensing speed will range from 7 ml/s to 33 ml/s.

Additionally, for those laboratories that require the production of large quantities of culture media, our media preparators can equipped with pressure support and an external dosing station, enabling dispensing speeds ranging from 65ml/s to 94ml/s. When using this dispensing mode, the laboratory operator has the option to control the process through an optical sensor or a foot pedal.

And finally, it is important to emphasize that dispensing can be paused and restarted if necessary, without compromising the integrity of the process. Dispensing lines can be cleaned, disinfected and emptied with high-temperature steam pulses, which prevents clogging of the dispensing line due to gelling of the culture medium. This procedure is carried out without affecting the temperature of the culture medium still inside the media preparator, since it is maintained indefinitely at the predetermined temperature until the entire prepared volume is dispensed.

6. What is the purpose of the high-temperature steam pulses?

The high-temperature steam pulses represent a key differentiating factor of our media preparator compared to other equipment available on the market. Thanks to this innovative system, the dispensing lines can be automatically cleaned and disinfected with steam pulses at 100ºC. These pulses can be performed before, during or after the dispensing phase is completed. This feature greatly facilitates the cleaning of the dispensing lines.

To perform these steam pulses, just press the corresponding button on the screen and hold the tip of the dispensing line inside a laminar flow cabinet, pointing the tip into a container to avoid burns to the operators and then heat the tip with a Bunsen burner. With this you are set to start again.

In fact, several of our customers have reported that, after cleaning and disinfecting the dispensing lines through this technique while also working under a laminar flow cabinet, they no longer need to sterilize the dispensing lines in an autoclave. Therefore, it is a standard procedure for our customers to initiate the dispensing process by passing high-temperature steam pulses through the entire tube and sterilizing the metallic tip using a Bunsen burner. This practice is carried out both before the start of the dispensing process and after its completion

7. Is it possible to obtain lot-by-lot traceability?

Claves para comprar el preparador de medios: trazabilidad por lotes.

With our media preparator you will be able to measure and control the different stages of the media production process in a simple and automatic way thanks to a specific software. Additionally, you will have the capability to document each batch independently and possess user administrative control. Furthermore, an embedded printer can be incorporated into the control panel to print tickets of each batch.

8. What connections are required to install the media preparator?

To install our media preparator in your laboratory you will only need:

1 electric connection

Please note that we offer multiple heating capacities ranging from 3kW in the smaller models to 30kW in the 80 and 100 liter models. These units with improved heating capacity are especially useful for plant tissue laboratories that prepare large volumes of culture media.

1 water inlet

A decalcified water network should be connected directly to the cooling water inlet that feeds the water cooling coils.

Regarding the water used for sterilization, it should be noted that you can either add the purified water manually by pouring it directly into the sterilization chamber or you can automate this task by connecting the equipment to a pressurized purified water network.

If you choose the second option, water should have a minimum pressure of >3.5 bar, a hardness of ≤0.02 mmol/l and a conductivity of 5<X≤15 μS/cm. Therefore, according to the type of installation, 1 or 2 water inlets will be required.

1 drain outlet

A drain outlet for draining both the water used for cooling and the sterilization chamber during cleaning.

9. What is the technical support and warranty like? Who offers it?

If there is one thing that sets us apart from the rest, in addition to the performance of our equipment, it is the technical support we offer to our customers, both before and after the acquisition of a media preparator. For RAYPA, it is of utmost importance that its personnel is actively engaged throughout the entire process of each media preparator, including the pre-sale stage, manufacture, installation, and post-sale. In addition, we also grant access and involve our team of engineers to better serve our customers. Such involvement is so important because we know that, although the use of our media preparators is quite simple and intuitive, doubts may arise regarding their installation, software and/or maintenance.

Additionally, our technical service is always available to assist with any questions or technical issues, whether through a video call or on-site as necessary.

Additionally, after purchasing a media preparator, you will benefit from a 12-month warranty. Our commitment is to minimize any potential downtime in your laboratory in case of a breakdown. We have a wide range of spare parts in stock and, depending on your location, we may even provide you with a replacement equipment to ensure continuous operation.

10. Is it possible to perform IQ/OQ/PQ validation of the equipment?

RAYPA’s media preparators are industrial laboratory machinery that must be calibrated and inspected from time to time to ensure proper operation and performance. Also, if your laboratory operates under GLP/GMP environments, we inform you that equipment qualification can be performed, including the following:

All three are intended to generate objective documentary evidence and provide proof of the suitability of installation, operation and performance of the equipment. We offer this service worldwide, either by ourselves or through our authorized partners.

We offer this service worldwide, either by ourselves or through our authorized partners. To perform them, in addition to reviewing the device documentation, we will perform tests on the microprocessor under normal operating conditions and also under operating limits to demonstrate its correct and constant performance. This documentation is available to any of our customers upon request.

Comprar un preparador de medios: preparador de medios Serie AE-MP de RAYPA.

11. Are there any training courses in order to get the most out of my equipment?

Yes, of course. After purchasing a media preparator, RAYPA offers a start-up service, as well as customized training sessions for customers that request it. These trainings can either be face-to-face or online. In addition, on our YouTube channel we offer you a video that explains the operation of our media preparators.

12. What is the equipment manufacturing and installation lead time? When can I start using it?

As a general rule at RAYPA, the manufacturing lead time for any of our media preparator models is usually 4 to 8 weeks. Although it can also be shorter if a product is already in stock.

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