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<div>A saturated solution of NaCl in distilled water imposes a relative humidity of about 75%. It works best for a small contained airspace. If you don't have reagent grade materials, it's ok, it just won't be exactly as predicted. But it will be the same for
both instruments.</div>
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<div dir="auto">I'll post the reprint when I'm back at my computer. That will give other solutions and the RH% they impose.</div>
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<div dir="auto">Cheers,</div>
<div dir="auto">Chris Tacker</div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>From:</b> Nhcoll-l <nhcoll-l-bounces@mailman.yale.edu> on behalf of Lennart Lennuk <Lennart.Lennuk@loodusmuuseum.ee><br>
<b>Sent:</b> Wednesday, October 13, 2021 3:47:35 AM<br>
<b>To:</b> nhcoll-l@mailman.yale.edu <nhcoll-l@mailman.yale.edu><br>
<b>Subject:</b> [External] [Nhcoll-l] easy way to calibrate temperature humidity sensors</font>
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<p class="x_MsoNormal"><span style="color:black">Hi!</span></p>
<p class="x_MsoNormal"><span style="color:black"> </span></p>
<p class="x_MsoNormal"><span style="color:black">In our herbaarium we have one quite old and one new temperature humidity sensor.</span></p>
<p class="x_MsoNormal"><span style="color:black">The data is quite diferent though these sensors are placed in the same spot.</span></p>
<p class="x_MsoNormal"><span style="color:black"> </span></p>
<p class="x_MsoNormal"><span style="color:black">Do you know any good and cheap ways to calibrate those senors?</span></p>
<p class="x_MsoNormal"><span style="color:black"> </span></p>
<p class="x_MsoNormal"><span style="color:black">Best regards!</span></p>
<p class="x_MsoNormal"><span style="color:black">Lennart Lennuk</span></p>
<p class="x_MsoNormal"><span style="color:black">Head of collections</span></p>
<p class="x_MsoNormal"><span style="color:black">Estonian Museum of Natural History</span></p>
<p class="x_MsoNormal"><span style="color:black">+372 6603404, 56569916</span></p>
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