Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
Ordering Policies
To obtain a quote for a Standard Reference Instrument (SRI), please contact Sales and Customer Service by phone at 301-975-2200 or email at srminfo [at] nist.gov (srminfo[at]nist[dot]gov).
Prices quoted for SRIs are in U.S. dollars ($). The prices shown therein are subject to change without notice. All billing terms are pre-payment required, unless an exception is authorized. Payment must be at NIST by the expiration date on the Proforma Invoice (PFI). Customer must provide a Federal Express account when the SRI is ready for shipment from NIST. Customers are responsible for all shipping fees, customs duties, import fees, and shipping insurance.