Please send me a printed or scanned certificate of the documents: calibrated to NIST-traceable Cannon Viscosity Standards; Cannon standards are made to ISO 90002 because I buy these products in March but don't see any certified ones. This is very urgent!
TDS water quality tester - TDS water hardness meter (portable digital salt meter for water analysis)
9 Review
Portable digital multimeter with sound continuity and thermocouple (electric tester) LTX DT-838
7 Review
80 Pieces Water Test Litmus Strips Litmus ph Paper Soil Acidity Meter Liquid pH Tester 1-14
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18 Review
π§ UEi Test Instruments DAFM3B Digital Multimeter
6 Review
π₯ Advanced Testo Wireless Hot Wire Anemometer Technology
4 Review
π¬οΈ Advanced 3-in-1 Indoor Air Quality Monitor with CO2/RH/Temp Data Logging and Audible Alarm - NDIR Sensor Technology
8 Review
π Dioxide Controller for Digital Gas Monitoring
5 Review