Thomas Traceable Conductivity Calibration Standard, Individually Tested, 5 Millisiemens, NIST/17025 A2LA Certified

Traceable conductivity standards, a certified reference material, are 100 percent compatible with all makes of instruments and probes. Traceable conductivity standards are the most accurate available. Accuracy at 25 degree C is (+/-0.25 microsiemens for 1, 5, 10 microsiemen solution or +/-0.25 percent for other solutions) or the uncertainty shown on the certificate, whichever is greater. Each bottle is labeled for calibrating conductivity (microsiemens/micromhos), resistivity (ohms), and dissolved solids (parts per million). This certified reference material meets test requirements for Federal, State, and local agencies, CAP, ASTM, NCCLS, CLSI, ACS, CLIA, AOAC, EPA, APHA, AWWA, WEF, USGS, USP, and ISO. Traceable certified reference material complies with and is essential for use in these official methods: AOAC 973.40, EPA 120.1, Standard method 2510 (APHA, AWWA, WEF), ISO 7888, DIN 38404, ASTM D1125, USGS I-1780, USP 645, and for A2LA/NVLAP accreditations/ISO 9000 certifications. Material may be used to calibrate all conductivity meters and to determine all conductivity cell constants. To assure accuracy an individually serial-numbered Traceable certificate is supplied to indicate traceability to standards provided by NIST (National Institute of Standards and Technology) and/or a National Standards Laboratory. Double A2LA accredited certification provides the highest achievable level of quality assurance, documentation, and accuracy. Certified reference materials are produced in an A2LA accredited ISO 17025 calibration laboratory by an A2LA accredited ISO Guide 34 reference material producer. Additional accreditations include ISO 31 (certificate content) and ISO 35 (statistical analysis), plus ISO 9001. Each bottle is supplied with step-by-step calibration instructions, individual temperature compensation chart, traceability information, and Traceable Certificate. Supplied in a 16 ounce bottle. 5 Millisiemens. 0.2 Megohms. 3.3 TDS/PPM.