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Calibration salts by Sper Scientific, blue and black, show temperature and humidity readings on the label.
Air quality calibration salt by Sper Scientific, with a labeled jar and a white top.
Blue calibration salt container by Sper Scientific with a white label showing temperature and humidity data.
Sper Scientific

HR-33

Calibration Salts

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Description

Calibration Salt Solutions for Pen Style Thermo-Hygrometer

Calibration Solutions for Sper Scientific Pen Style Thermo-Hygrometer #800127.

  • HR33 - MgCl Humidity Calibration Standard: 33% RH
  • HR75 - NaCl Humidity Calibration Standard: 75% RH

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