Specialty Calibration Gas Mixture Supply

Nashville Electric Service is soliciting bids for the supply of a reusable 116L PORTAGREEN cylinder pre-filled with a certified 4-gas calibration mixture at 200 bar pressure, containing precisely 50% LEL methane, 10 ppm hydrogen sulfide, 50 ppm carbon monoxide, and 18% oxygen balanced in nitrogen. The cylinder must be fully compliant with calibration standards, accompanied by full certification and traceable documentation ensuring the accuracy and integrity of the gas mixture composition. The contract is structured as a subcontract under NAICS code 325998, with a response deadline of July 29, 2026, and performance expected in Nashville. The cylinder is designated for reuse, requiring the supplier to deliver it in a condition suitable for refilling and return cycles while maintaining all regulatory and safety requirements. All deliveries must include documentation that supports chain-of-custody and analytical validation, ensuring suitability for use in industrial gas detection and safety calibration applications.