This item has been shown 26 times.
One was Recently activated with 24 months left. The manufacture activate date is 12/2019. Has certificate of calibration from 04/2019. Turned on 4/5/2021. Not used technically. Will most likely need recalibrated. One is just open box and has not been activated and one is still sealed in box! They all will possibly need recalibrated upon activation. MSA Altair Hydrogen Sulfate Gas Monitor H2S Please Read!!!. Condition is "Used". Shipped with USPS Priority Mail.