Flux Towers - Mandan ND

The Department of Agriculture Agricultural Research Service seeks quotations for two flux towers for deployment in Mandan, North Dakota, with quotes due September 24, 2026 at 09:00 ET. This is an unrestricted commercial item procurement under FAR Part 12, using lowest-price technically acceptable evaluation.

Place of performance is Mandan, ND. The procurement requires two units of a Carbon and Water Flux System or equivalent capable of measuring CO2 (0–1500 μmol mol⁻¹) and H2O (0–60 mmol mol⁻¹) concentrations, latent and sensible heat, momentum, and biometeorological parameters including Photosynthetic Flux Density (0–3000 μmol m⁻² s⁻¹), air temperature (–40 to 60°C), relative humidity (0–100%), and barometric pressure. The system must perform flux processing on the sensor itself with an integrated gas analyzer and ultrasonic anemometer measuring vertical and horizontal wind speed components. Raw data at 10 Hz and processed data must be retrievable via serial, SDI-12, and USB micro connections. The system includes a minimum one-year subscription to processed data, an accessory node link supporting up to 50 environmental sensors in a wireless mesh network, a 4–5 meter mounting tower with base, and a solar panel and battery system for continuous operation. Contract type is Firm Fixed Price with delivery within 30 days after award, FOB Destination. NAICS 334516, PSC 6640. Quotations are evaluated by price, technical acceptability, and past performance; only the lowest-priced quote is evaluated for technical acceptability initially. Pricing must remain firm for 60 calendar days from the quote due date. Buy American and Place of Manufacture certifications are required. Questions are due 24 hours before the offer deadline. Amendment 0001, effective September 17, issued revised specifications eliminating the environmental sensor package requirement; quoters must acknowledge receipt of the amendment.