Terms of Sale

We try to be as flexible as we can while giving good support efficiently. That leads to a few policies, which this page explains: how to order and pay, shipping, our warranty, repairs, and returns.

Last updated: October 8, 2026.

Ordering online

You can buy our products online with a credit card, or request a quotation and order with a purchase order. Repairs, upgrades and smaller items should be paid by credit card through this web site. If you have any trouble ordering online, please let us know so we can help.

Purchase orders

We accept purchase orders for orders over $600.00, with payment terms of no more than 30 days. We don't produce quotations for most items under $600.00. Vendor supply forms should be five pages or fewer and take no more than 15 minutes to complete.

Additional charges may apply for new vendor registrations if they add onerous upfront paperwork.

Payment

For orders of $600.00 or less, please order online and pay by credit card. We accept all major credit cards. A few other items can only be bought by credit card; their pages say so. Card payments are made on our payment provider's secure page; we never see or store your card number. We do not take credit card details over the telephone.

For orders placed with a purchase order, we accept payment in US dollars by US bank check, bank transfer, or credit card. Payment terms are Net 30.

Shipping

Choose a shipping method in your cart; the price is shown there.

We change shipping carriers from time to time based on cost and efficiency.

For domestic shipping we are using Fedex at this time. For international shipping we use DHL. All taxes, duties and import fees are paid by the customer directly to theshipper.

Choosing express shipping does not guarantee that we can fill your order immediately. If you are under a time constraint, please contact us and we will do everything we can to expedite your order.

Custom or special items

Please email us at sales@curdes.com to discuss pricing, lead time, and the technical details of custom devices. To put together a complete system, see Build a system.

Warranty

Our products are under warranty against manufacturing defects for one year. During that year we will repair any such problem free of charge. Damage caused by unusually rough handling or negligence is not covered by the warranty and will be repaired at a reduced charge.

After one year we will repair malfunctioning equipment for a fixed charge. See Repairs, Upgrades & Services to order a repair.

Repairs and upgrades: age limit

We repair and upgrade products for up to 8 years from the date of purchase. This helps make sure our equipment stays a reliable part of your study. If you have products older than that, we recommend replacing them.

If you are unsure of an item's age, email us its serial number and we will tell you. The serial number gives a good estimate of when a device was made, which is usually close to when it was bought. Currently, a device with serial number 4114100 is about 8 years old; if yours is lower than that, it is probably more than 8 years old.

Returns

There is a 30-day trial period. If our equipment doesn't meet your research needs, please contact us and arrange for it to be sent back in its original condition. We don't want anyone to be unhappy with our equipment. The only condition is that no data acquired during the trial period may be used in a publication or presentation.

Please email sales@curdes.com before sending anything back.

You pay the cost of sending items to us for repair or exchange. During the warranty period we pay for shipping them back to you; after the warranty period, the cost of shipping them back is added to the repair charge.