Do you have a question regarding Rhizon samplers or accessories? Please have a look at the frequently asked questions below.
Is your question not listed? Please send an email to firstname.lastname@example.org and we will get back to you.
Questions on rhizon samplers
I am not sure which type of Rhizon I need, can you help me?
Of course! Please send us an email and explain about your research goal and setup (including a drawing helps a lot!), and we are happy to give advice on which Rhizon to use.
What is the difference between Rhizon MOM and Rhizon CSS?
Rhizon MOM samplers have a tip with a bulb (2.8 mm), which exceeds the diameter of the porous membrane (2.5 mm). Therefore, inserting Rhizon MOM samplers cause a little disturbance of the soil, and you will need to wait for the soil to set around the sampler before you can begin sampling.
Rhizon CSS samplers have a flat tip (2.5 mm), which does not exceed the diameter of the porous membrane. Inserting Rhizon CSS samplers causes minimal disturbance, which allows for direct sampling.
What is the difference between a male luer and female luer?
A male luer can be used in combination with needles and vacuum vials to create a vacuum and extract a sample. The advantage is that the collected sample doesn’t make contact with the air. We sell needles and vacuum vials of 9 ml.
A female luer can be used in combination with syringes and retainers to create a vacuum and extract a sample. The advantage is that you can easily recreate the vacuum by pulling out the plunger again. We sell syringes and retainers in different sizes
Which accessories do I need for sampling?
This depends on the type of Rhizon model.
If you have Rhizon samplers with a male luer connection, you will need needles and vacuum tubes to apply a vacuum.
If you have Rhizon samplers with a female luer connection, you will need syringes to apply a vacuum.
See all Rhizon related accessories
I cannot extract moisture, what should I do?
You may have forgotten to take off the (blue or red) protection cap off the Rhizon. Please check and try again.
Is the protection cap already off? You may need to wait a little longer. The membrane of the Rhizon samplers needs to be complety wet before you can apply a vacuum.
Can I order Rhizons with other dimensions?
Yes, customization is possible. Please send us an email with your inquiry, and we will provide you with a quote.
What is the yield of Rhizon samplers?
This depends on the soil characteristics, moisture content and the applied vacuum. As all soils are different, there is no straight answer to this question.
Please note that the sampling solution is already filtered by the membrane of the Rhizon.
Questions on Ordering
Where can I find the prices of Rhizon samplers and accessories?
Please send us an email with your inquire and we are happy to provide a quote.
How can I order products from Rhizosphere Research Products?
Please send us an email with the products and the quantity you wish to order. Make sure the following information is mentioned:
- Delivery Address
- Name of the recipient
- Telephone number of the recipient
- Invoice Address
- VAT number
What is the delivery time of my order?
Most orders are shipped within three business days. This could take longer for larger orders or orders with customized products. Send us an email for inquiries about specific orders.