This combined synopsis/solicitation under FAR Part 12 is an RFQ for a multi-parameter water quality probe capable of high-frequency measurements in laboratory or field settings for Upper Midwest agricultural landscapes. The required probe is peculiar to one manufacturer, with complete requirements provided in the Water Sensor Specifications. The acquisition is unrestricted and is not set aside for small business concerns. The applicable NAICS code is 334514, and all responsible sources may submit a quotation for consideration.