Howell Laboratories Inc.

(A2LA Cert. No. 4823.02) Revised 01/08/2026 Page 1 of 1 SCOPE OF ACCREDITATION TO ISO/IEC 17025:2017 HOWELL LABORATORIES INC. 188 Harrison Road Bridgton, ME 04009 Chris Steckino Phone: 207 647 3327 csteckino@howelllabs.com CALIBRATION Valid To: November 30, 2026 Certificate Number: 4823.02 In recognition of the successful completion of the A2LA evaluation process (including an assessment of the organization’s compliance with A2LA’s Calibration Program Requirements), accreditation is granted to this laboratory to perform the following calibrations1, 3: I. Thermodynamics Parameter/Equipment Range CMC2 (±) Comments Humidity – Dew Point Sensors -100 °C4 -90 °C -80 °C (-60 to 20) °C 1.2 °C 1.2 °C 0.74 °C 0.40 °C Chilled mirror dew point meter __________________________ 1 This laboratory offers commercial calibration service. 2 Calibration and Measurement Capability Uncertainty (CMC) is the smallest uncertainty of measurement that a laboratory can achieve within its scope of accreditation when performing more or less routine calibrations of nearly ideal measurement standards or nearly ideal measuring equipment. CMCs represent expanded uncertainties expressed at approximately the 95 % level of confidence, usually using a coverage factor of k = 2. The actual measurement uncertainty of a specific calibration performed by the laboratory may be greater than the CMC due to the behavior of the customer’s device and to influences from the circumstances of the specific calibration. 3 This scope meets A2LA’s P112 Flexible Scope Policy. 4 This temperature is not directly traceable; it is considered consensus traceability.