Resistance Transfer Standard

Solicitation / RFP / RFQ

This document is a Purchase Description (PD) for a Resistance Transfer Standard. It outlines the requirements for a system consisting of six boxes of precision resistors with nominal values ranging from 1 ohm to 100 kilo-ohms. The purpose is to procure a standard that offers metrology-grade repeatability, low hysteresis, and low impedance connections for accurate four-terminal measurements, replacing legacy models.

• Six (6) resistor boxes, each containing twelve (12) individual precision resistors in series.

• Nominal values: 1 Ω, 10 Ω, 100 Ω, 1 kΩ, 10 kΩ, and 100 kΩ.

• Nominal resistance tolerance: Matched to within 10 ppm initially, with specified tolerances for 6 months (≤20 ppm), 2 years (≤35 ppm), and 5 years (≤50 ppm).

• Calibration Uncertainty (k=2): ±(1 ppm + 1 μΩ) or ±(1 ppm + 0.1 μΩ) depending on configuration.

• Stability: 30-day, 180-day, and 12-month stability requirements specified (10 ppm for 30/180 days, 20 ppm for 12 months).

• Temperature Coefficient: Specified ppm/°C values for different resistance ranges.

• Power Coefficient: Specified ppm/mW values for different resistance ranges.

• Maximum Current and Voltage Capabilities: Detailed for single resistors, 10 resistors in parallel, and 10 resistors in series.

• Mechanical & Physical Requirements: Includes configuration, output connections (four-wire, binding posts), weight limits (6.8 kg per box, 40.82 kg total), and dimensions (152x152x381 mm per box).

• Oil Immersion: Resistors below 100 kΩ shall be oil-filled and hermetically sealed for thermal isolation and stability.

• Operating Environment: Specified temperature (22.8°C ± 3.3 °C) and humidity (20-50% RH) ranges.

• Quality: Resistors must be aged and manufactured from materials with excellent stability and low temperature/power coefficients.

• Marking: Labels must include nominal value, temperature range, max voltage/current, and temperature coefficient.

• Design: Minimize insulation leakage, resistance variations, and be suitable for shipping, storage, installation, and service.

• Terminals: Must guarantee successful oil containment for 20 years.

• Calibration: Units must be fully calibrated by comparison to external standards traceable to NIST or equivalent.

• Not explicitly stated in this document, but implies a procurement contract.

• Items must meet or exceed the specifications stated in the PD to be evaluated for acceptability.

• Calibration certificates traceable to NIST or equivalent are required.

• Testing will be performed to assure requirements are met.

• Not specified in this document.

• This document replaces legacy models including ESI SR1010, TEGAM SR1010, IET SR1010, SR1030, and SR1060.

• Data requirements include user/service manuals, calibration certificates, failure summary reports, and engineering design data.

• AFMETCAL has observed that active switches may introduce measurement errors, implying a preference for passive connectors.

Other / Unclassified

This document is a PDF portfolio wrapper, indicating that the actual content requires a specific PDF reader version (Acrobat X or Adobe Reader X, or later) for optimal viewing. It does not contain substantive information about the opportunity itself.

Bidders should be aware that the attached document requires a specific software version to access its content. They may need to update their PDF reader to view the full details of the opportunity.

Solicitation / RFP / RFQ

This document, Section L - Instructions to Offerors, provides detailed guidance for preparing and submitting proposals for Solicitation Number FA226326Q0006. It outlines the requirements for offerors to ensure their proposals are evaluated effectively and fairly.

• Proposals must include all data and information requested and comply with the Purchase Description (Section C).

• Offerors must assume the Government has no prior knowledge of their facilities or experience.

• Proposed units must be new, commercial items or commercially available off-the-shelf (COTS). Reconditioned, remanufactured, or used items are not acceptable.

• Proposals should be clear, concise, and provide convincing rationale for meeting requirements, not just restate them.

• Elaborate brochures or embellishments are unnecessary.

• The solicitation is for commercial products and commercial services.

• The contract will be a DO-A70 rated order, with A-70 as the program identifier symbol for Electronics and Communication Equipment.

• Proposal Submission Deadline: May 15, 2026, at 2:00 PM EDT.

• Submission Method: Electronic submission via DoD SAFE (https://safe.apps.mil/). Emailed proposals will not be accepted.

• File Format: Microsoft Word 2016 or earlier, MS Excel 2016 or earlier, MS PowerPoint 2016 or earlier, or Adobe PDF (text searchable).

• Timestamping: Uploaded files must be timestamped by the offer due date and time.

• Proposal Validity: Proposals must be valid until July 31, 2026.

• Unit Submission: Proposed units must be delivered to AFMETCAL by the proposal deadline.

• Evaluation: The Contracting Officer (CO) has determined a high probability of adequate price competition. However, offerors may be required to submit cost data if competition is deemed insufficient. The Government may take up to 45 days for initial evaluation and acceptance testing of proposed units.

• All responsible sources may submit an offer.

• Contact points for questions are Michael Hickey (CO) and Christine Patterson (Contract Specialist).

• All referenced documents are available on SAM.gov.

• The Government reserves the right to cancel the solicitation at any time.

• Proposals are organized into two volumes: Technical Volume and Proposal Documentation.

• Page limitations apply to the Technical Volume (40 pages, excluding technical manuals).

• Specific formatting requirements for page size, margins, and font size are detailed.

• Offerors must acknowledge receipt of any RFQ Amendments.

Solicitation / RFP / RFQ

This solicitation is for a five (5) year Indefinite Delivery Indefinite Quantity (IDIQ) contract for Resistance Transfer Standards. Funds will be obligated/cited upon contract award and each subsequent Delivery Order (DO). The Government is not obligated to order more than the stated minimum quantity but reserves the right to order up to the maximum.

• Proposal Evaluation Unit: One (1) unit required for testing and evaluation, to be delivered to AFMETCAL, Heath, OH, by the proposal due date.

• Production Units: Minimum of two (2) and maximum of ten (10) units per month, delivered directly to PMELs. Specific delivery instructions will be provided with each DO.

• Data Requirements: IAW DD Form 1423 Exhibit A and Data Item Descriptions (DID), including COTS Manual, Calibration Certificate, and Commercial Engineering Design Data.

• Unique Item Identification: Required for items with a Government unit acquisition cost of $5,000 or more, and potentially for items below that threshold as identified in the Schedule.

• Contract Type: Indefinite Delivery Indefinite Quantity (IDIQ)

• Period of Performance: Award through September 30, 2030.

• Estimated Quantity: 77 units (including proposal evaluation unit).

• Minimum Quantity: 1 unit.

• Pricing Arrangement: Firm Fixed Price.

• Delivery Schedule: Production units are due 90 days after contract award or 30 days after completion of the previous DO, whichever is later. Deliveries continue at a rate of 2-10 units every 30 days.

• Offer Due Date: May 15, 2026, 02:00 PM.

• Evaluation Factors: Technical Acceptability and Price.

• Invoicing: Via Wide Area WorkFlow (WAWF).

• This acquisition is UNRESTRICTED.

• Attachments include: PD Resistance Transfer Standard, Data Requirements, Anticipated Delivery Locations, Section L (Instructions to Offerors), Section M (Evaluation), and Total Evaluated Price Worksheet.

• FAR Clauses 52.212-1, 52.212-3, and 52.212-4 are attached. FAR 52.212-5 is incorporated by reference.

Form / Attachment / Pricing Sheet

This document lists anticipated delivery locations for units that are direct ship to the PMEL (Precision Measurement Equipment Laboratory). This list is provided to assist offerors in determining the cost of FOB Destination shipments.

• A comprehensive list of Air Force bases and Air National Guard (ANG) bases across the United States.
• Each location is presented with its associated state.

Offerors should use this list to estimate transportation costs and logistics associated with delivering goods to various potential destinations. The list is subject to change and will be removed at the time of award. Specific addresses will be provided with each Delivery Order, if ordered.

Solicitation / RFP / RFQ

This document outlines the evaluation factors and basis for contract award for Solicitation Number FA226326Q0006. The Government intends to award a firm-fixed-price contract for commercial products and services under Simplified Acquisition Procedures (SAP).

• Proposals must meet all solicitation requirements, including terms and conditions, representations, certifications, and technical requirements.

• The Purchase Description (PD) contains essential characteristics for contract execution.

• The Government intends to award one (1) contract.

• The Government reserves the right to not award a contract.

• Evaluation Factors:

  • Factor 1: Technical (Significantly more important than Price)
    • Subfactor 1: Purchase Description Technical Requirements (Must be rated Acceptable; failure results in proposal unacceptability).
    • Subfactor 2: Enhanced Capabilities (Rated Outstanding, Good, or Neutral).
  • Factor 2: Price (Evaluated for completeness, reasonableness, unbalanced pricing, and Total Evaluated Price).

• Award Basis: Best value to the Government, considering both technical factors and price. The Government may award to a higher-rated, higher-priced offeror if the superior technical performance outweighs the price difference.

• Discussions: The Contracting Officer (CO) reserves the right to award without discussions. Initial offers should represent the best terms.

• Deficient Proposals: Proposals may be excluded if found to be grossly deficient or if they fail to meet essential requirements.

• Correction Potential: The Government will consider the "correction potential" of any deficiency.

• Not explicitly stated in this document, but the award will be made to a responsible offeror.

• This document is Attachment 5, Section M - Evaluation.

• Offerors must clearly identify any exceptions to solicitation terms and conditions with supporting rationale.

Form / Attachment / Pricing Sheet

This document is a Total Evaluated Price (TEP) Worksheet for Solicitation Number FA226326Q0006, "Resistance Transfer Standard." It is for evaluation purposes only and is used to determine the Total Evaluated Price as described in FAR 52.212-2. Bidders are required to complete and return this worksheet with their proposal package.

• Solicitation Number: FA226326Q0006
• For: Resistance Transfer Standard
• Contract Type: Five (5) year Indefinite Delivery Indefinite Quantity (IDIQ) solicitation.
• Best Estimated Quantity (BEQ): 77 units for the IDIQ.
• Minimum Order Quantity: 1 unit.
• CLINs:
  • 0001 Resistance Transfer Standard (1 unit)
  • 0002 Data - Proposal Evaluation Unit (1 unit)
  • 0003 Production Units (quantities vary by fiscal year from FY26 to FY30)
  • 0004 DATA - Production Units (quantities vary by fiscal year from FY26 to FY30)
• Pricing: Requires firm-fixed-priced contract line items (CLINs). If not separately pricing a CLIN, identify with NSP.
• Total Evaluated Price: To be calculated by the bidder, with a note indicating "77 units/data."

This worksheet is crucial for bidders to understand the pricing structure and estimated quantities for the solicitation. Completing it accurately is a requirement for proposal submission and will be used by the government for evaluation purposes.