As-Found / As-Left With Temperature Compensation Calibration Services
For the Torque Data Your Program Cannot Afford to Question
When a transducer feeds a flight test or a defense qualification, the measurement behind that decision carries real consequences. A sensor that drifts under heat or high rotation can void a test campaign or allow a flawed reading into a system where people depend on the result. Our mission-critical calibration services exist for the programs where that outcome is not an option.
Senior metrology and R&D leaders in aerospace, defense, and automotive programs work under the strictest quality systems and need the highest level of documentation available. We built our laboratory and our service tiers around that standard.
Accreditation That Removes the Doubt
S. Himmelstein and Company operates an NVLAP-accredited laboratory (Lab Code 200487-0) under ISO/IEC 17025:2017, with NIST-traceable certificates for every calibration. We maintain nine accredited stands spanning 10 ozf-in to 4,000,000 lbf-in (0.07 Nm to 452 kNm), the widest range of commercially available accredited torque calibration. Our 4,000,000 lbf-in stand is one of only three worldwide accredited above 1,000,000 lbf-in, and it holds the lowest uncertainty of any. Nine stands also mean your work moves through the lab without queuing behind a single fixture.
Mission-Critical Calibration Services
Our As-Found / As-Left With Temperature Compensation calibration services are used for programs where no single source of error can be left unaccounted for. The process runs in four stages:
- As-found calibration: We calibrate the transducer exactly as it arrives, before any adjustment, producing the as-found record your quality system needs to prove the instrument’s condition at the moment it came out of service.
- Temperature characterization: We cycle the unit through elevated temperatures, +75°F to +175°F, to characterize how the strain gage bridge behaves under heat, and where the results call for it we apply compensation to bring performance back within specification.
- Speed validation: We run the transducer at its maximum rated speed for 30 minutes to confirm that nothing shifts under rotation.
- As-left calibration: A final 10-point calibration documents the corrected, verified state of the unit.
What you hold at the end is a full account of the instrument’s behavior across the conditions it will actually face, traceable to NIST and accredited under ISO/IEC 17025:2017. For senior metrology and R&D teams answering to the strictest quality systems, As-Found / As-Left With Temperature Compensation is the level of assurance that leaves nothing to interpretation.
The OEM Advantage for Harsh-Environment Programs
Because we manufacture the transducers we calibrate, our factory service corrects temperature-related effects at the component level, a step no third-party lab can reproduce.
We also calibrate units from other manufacturers, including HBM, Honeywell, Futek, Magtrol, Interface, Kistler, and PCB, so a single accredited source can support your entire inventory. Programs that depend on aerospace transducer calibration to demanding documentation standards gain a single point of accountability for every sensor in the test cell.
This is what comprehensive calibration services should mean for a mission-critical asset: traceable data backed by defensible records, validated under the conditions where the measurement actually matters.
Scope Your Calibration With Our Engineers
Our engineers review your application before any work begins. Tell us about your transducer and its operating environment, and we will scope the right tier for your documentation requirements. Call 1-800-632-7873 or submit a quote request to start a technical conversation with our calibration team.
Frequently Asked Questions About Mission-Critical Calibration Services
How do I send a transducer in for calibration?
Contact us for a Return Material Authorization (RMA) number before shipping anything to the laboratory. The RMA number lets us track your unit and route it to the correct stand as soon as it arrives. You can request one by phone or through the RMA form on our support page.
Can you calibrate rotational speed as well as torque?
Yes. We provide accredited speed (rpm) calibrations from 900 rpm to 10,000 rpm, which supports transducers used in high-speed dynamometer and driveline testing where rotational accuracy matters as much as the torque reading.
Is there a faster option than the 10-point calibration?
For applications that do not require the full 10-point profile, we offer a 3-point calibration (three ascending points and one descending point). It is a lighter-weight check, though critical assets under a formal quality system generally warrant the 10-point service.
How often should a critical transducer be recalibrated?
Most quality systems set a fixed interval, commonly once per year, though the right cadence depends on how heavily the unit is used and the conditions it sees. Heavy use or exposure to extreme temperatures can justify more frequent calibration. Our engineers can help you set an interval that meets your auditors’ requirements.