Frequently asked questions


What do I need to calibrate or validate my particle sizing instrument?

I need to an ISO 17025 compliant standard to calibrate my instruments. Can you help?

We can help with our NanoStandard™ 17025 and MicroStandard™ 17025 Series. These products are traceable to reference materials calibrated by an ISO 17025 certified national standards laboratory.

How can I verify the accuracy of my particle counters?

We recommend Applied Microspheres Particle Size Standards and Count Controls.

Can you offer a multi-modal size standard for checking the resolution of my laser diffraction instrument?

We can offer MS Series, a mixture of monodisperse particle populations.

Do you have a standard for measuring zeta potential?

Yes, we have Zeta Potential Controls for monitoring the zeta potential value on your instrument.

I want to monitor the fluorescence intensity of my flow cytometer. Do you have a product for this?

We can offer Cyto-Cal Multifluor for monitoring the stability of your flow cytometer.

I can’t find the optimal standard for calibrating our instruments. Are you in a position to develop a dedicated instrument control for us?

Yes, we will be happy to discuss your specific requirements. Please click here!

I am interested in an intermediate particle count control to perform a regular monitoring of my liquid particle counter instrument, meeting the USP

PharmaCount™ will be the perfect candidate for this job.

Do you have a product for verifying the accuracy of my dry powder particle sizing instrument?

Please have a look at our Powder Size standards.

How many particles per mL/gram are in the product?

To calculate the quantity of particles per mL/gram, please feel free to make use of our calculating tool.


Where is your company located?

Applied Microspheres is located in Leusden, The Netherlands.

Where do your products come from?

Our products are made in our laboratory in Germany.

Does the company have recognitions of its quality system?

Applied Microspheres is ISO: 9001-2015 certified. Please download our certificate here.

How do I contact support?

Our sales team is available for support on Monday to Friday from 8:30 until 17:00 (CET). You can reach us by phone on +31 338003401, or by e-mail:


How can I request a quotation?

For quotation requests please send an e-mail to Aside from the products you would like to receive an offer for, please also include the following company details in your enquiry: Shipping- and billing address, phone number, and VAT number. Our sales team will get back to you as soon as possible.

How long will your offer be valid?

Our quotations are valid for a period of 30 days.


What payment methods are available?

We accept payment by bank transfer, or credit card via PayPal (7,5% fee).


Do you have a return policy?

If you want to return a product, please ask for support of our sales team, and we will handle your request. In all circumstances the product has to be unopened, and the request has to be within 1 month of delivery. Kindly note a 15% restocking fee is charged with every return.

How long does it take for a refund to be issued?

Please note we will not transfer money back into your account. Instead, the open balance will be subtracted from your next order.


How do I purchase your products?

If you would like to purchase our products, please send your order to To process your order we need a PDF with the following data: The items you wish to purchase, reference number, quotation number if relevant, shipping- and billing address, and all your company details including VAT number. If you want to use a Purchase Order template, please download it here.

Can I make changes to an order I already placed?

If you want to change your order, please reach out to us as soon as possible. Depending on the status of your order, we are able to make changes.

Can I cancel my order?

If you want to cancel your order, please reach out to us as soon as possible. When the order has recently been send in, or a product is unavailable, you are able to cancel the order.


What are the shipping options?

Our parcels are shipped with DHL. We also accept pick-up.

Do you ship internationally?

We ship worldwide. Kindly note that we are unable to deliver in the following countries: Ukraine, Russia, Cuba, Iran, Sudan, Syria and North Korea.

When will I receive my order?

Depending on the product, we ship prompt from stock, or within the time frame of approximately 2-3 weeks.

Can I track my package?

When your order has been picked up by our DHL courier, an automatic message will be send from DHL with a tracking link.

Why didn’t I receive my full order?

When a product has a longer lead time, it is possible that we send you the order in multiple shipments.

Please do not hesitate to contact us, if this hasn’t quite answered your question.