This is a combined synopsis and solicitation for a total small business set-aside to supply four thermistor strings for a borehole project. The instruments must meet detailed specifications, including specific lengths and sensor spacing, ±0.1°C accuracy, a diameter no greater than 0.55 inches, operation down to -67°F, and compatibility with standard data loggers. Delivery is required FOB Destination to Fort Wainwright, AK 99703, with Net 30 payment terms. Award will be based on the lowest price technically acceptable offer, considering technical capability and total quoted price including shipping. Interested vendors must be actively registered in SAM with no active exclusions.