The National Institute of Standards and Technology (NIST) is conducting market research to identify vendors capable of supplying four Multichannel time interval measurement systems. This is a sources sought notice, not a solicitation, and no contract will be awarded from this announcement. Responses must be submitted by the date and time specified in the notice, and no budget amount is provided. The location for performance is not specified, but respondents must indicate the country of manufacture. This notice will help determine if the acquisition will be set aside for small businesses under NAICS code 334516.