Cryogenic Radiometer Electronic Control System Tender - 138501946

Procurement Summary

Country: USA

Summary: Cryogenic Radiometer Electronic Control System Combined Sources Soughtnotice of Intent to Sole Source

Deadline: 08 Apr 2026

Posting Date: 26 Mar 2026

Other Information

Notice Type: Tender

TOT Ref.No.: 138501946

Document Ref. No.: NIST-SS26-94

Competition: ICB

Financier: Self Financed

Purchaser Ownership: Public

Tender Value: Refer Document

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Tender Details

***THIS IS A COMBINED SOURCES SOUGHT NOTICE AND NOTICE OF INTENT TO SOLE SOURCE***
The National Institute of Standards and Technology (NIST), The NIST critical mission includes establishing and disseminating the SI units through physical measurement standards. For optical power measurements, the NIST Primary Optical Watt Radiometer (POWR) serves as the Nation-s standard. POWR performs low-noise optical power calibrations using an instrument called an absolute cryogenic radiometer (ACR), a type of primary optical standard detector which allows optical power measurements to be traced directly to calibrated electrical power. The control electronics for these devices are rather specialized, requiring two low-noise temperature control circuits monitored by alternating current (AC) resistance bridges.
The purpose of this acquisition is to procure a modern, commercial-off-the-shelf control electronics system to replace an outdated system for the POWR absolute cryogenic radiometer (ACR). The new system must provide high-precision temperature control and accurate electrical substitution power measurements to prevent system failure and improve data collection efficiency through modern interfaces and control algorithms.
NIST is seeking information from sources that may be capable of providing a solution that will achieve the objectives described above, in addition to the following essential requirements:
General requirements of all components:
Should include two independent, low-noise 4-wire AC resistance bridges with automatic phase compensation for the POWR ACR receiver and heat sink:
usable with resistive sensors (Germanium Resistance Thermometers) from 10 Ω to 100 kΩ
sensor excitation frequency should be in the range from 100 Hz to 500 Hz
excitation currents from 200 nA to 1 mA
Two independent electrical substation heater outputs (one for the heat sink and one for the receiver):
for temperature adjustment, control, and measuremen...
Notice ID: nist-ss26-94

Department/Ind. Agency: commerce, department of

Sub-tier: national institute of standards and technology

Office: dept of commerce nist

Product Service Code: 6640 - laboratory equipment and supplies

NAICS Code: 334513 - Instruments and Related Products Manufacturing for Measuring, Displaying, and Controlling Industrial Process Variables

Inactive Dates: apr 23, 2026

Inactive Policy: 15 days after response date

Documents

 Tender Notice