Cons No valve — warmer than valved siblings 4600N95/4800N95
The 7583P100L carries a magenta P100 marking alongside its gas-class marking
supporting both feet for all-day comfort
Foam vs DuraPlug: DuraPlug is NRR 32 (single-use foam)
Step up to the P100 D3091 when the substance or your workplace assessment calls for the highest efficiency — some regulated hazards specify P100
HOLDPEAK Ammonia Gas Meter Detector, NH3 Gas Monitor Sensor, 0-100 PPM Range OV/AG/P100 Cons No valve — warmerEDITORIAL REVIEW HOLDPEAK Ammonia Gas Meter Detector, NH3 Gas Monitor Sensor, 0 100 PPM Range Assessed on the standards the product is actually certified to and on how the format fits a working shift, by Steven Eaton, WC Safety editor. AMAZON CUSTOMER RATING: 4. 1 5 WC Safety research note on the HOLDPEAK Ammonia Gas Detector, a portable NH3 gas detector. Rating shown is the Amazon customer rating at the time of writing, not our own score.