{"product_id":"sentry-air-model-300-pre-filter-pads-12-pack","title":"Sentry Air Model 300 MERV 8 Pre-Filter Pads (12 Pack)","description":"\u003ch1\u003e\n\u003cspan\u003eKeep your air filtration system operating at peak performance with Sentry Air Systems \u003c\/span\u003e\u003cspan\u003eMERV 8 \u003c\/span\u003e\u003cspan\u003eModel 300 Pre-Filter Pads. \u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cp\u003e\u003cstrong\u003eDesigned specifically for Sentry Air Systems 300 Series fume extractors and portable air cleaners, these disposable pre-filters capture larger airborne particulates before they reach the primary HEPA or carbon filter. \u003c\/strong\u003e\u003cspan\u003eBy trapping dust, smoke particles and debris early in the filtration process, Model 300 Pre-Filter Pads help extend the life of expensive main filters while maintaining proper airflow and filtration efficiency. \u003c\/span\u003e\u003cspan\u003eThese replacement pads are ideal for welding fume extraction, solder smoke removal, laboratory applications, powder handling and general industrial air filtration environments.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDesigned for Sentry Air Systems Model 300 Series including: \u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\u003ca href=\"..\/products\/30-portable-floor-sentry-fume-extractor\"\u003e\u003cstrong\u003ePortable Fume Extractors\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\u003ca href=\"..\/products\/wall-mounted-fume-extractor\"\u003e\u003cstrong\u003eWall Mounted Fume Extractors\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\u003ca href=\"https:\/\/sperdirect.com\/products\/40-ductless-fume-containment-hood-copy\"\u003e\u003cstrong\u003eBenchtop Fume Extractors\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\u003ca href=\"..\/products\/ductless-fume-containment-hood\"\u003e\u003cstrong\u003eDuctless Fume Hoods\u003c\/strong\u003e\u003c\/a\u003e\u003c\/li\u003e\n\u003cli style=\"font-weight: bold;\"\u003e\u003cstrong\u003e\u003ca href=\"..\/products\/portable-clean-room\"\u003ePortable Clean Rooms\u003c\/a\u003e\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong style=\"font-size: 0.875rem;\"\u003eKey Features\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMERV 8 rated filter captures larger particulates and airborne debris\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003e70-80% efficiency on particles from 3-10 microns\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eHelps extend HEPA and carbon filter life\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSupports improved airflow and system efficiency\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eQuick and easy filter replacement\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDisposable design for simple maintenance\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eAvailable in standard particulate and carbon versions\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSold in packs of twelve (12)\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eApplications\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eWelding fume extraction\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSoldering smoke removal\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eChemical fume control\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLaboratory filtration\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eDust collection\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003ePowder handling operations\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLight grinding and polishing applications\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan\u003e\u003cb\u003eAvailable Filter Types\u003c\/b\u003e\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003cb\u003eStandard Particulate Pre-Filter Pads\u003cbr\u003e\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003eDesigned to capture dust, smoke and larger airborne particulates before they enter the primary filtration stage.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003cb\u003eCarbon Pre-Filter Pads\u003cbr\u003e\u003c\/b\u003e\u003c\/span\u003e\u003cspan\u003eActivated carbon impregnated pads that assist with light odor control and VOC reduction while also capturing particulates.\u003c\/span\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eWhy Replace Pre-Filters Regularly?\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eReplacing pre-filter pads on a routine basis helps:\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eMaintain proper airflow\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eImprove overall filtration performance\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eReduce strain on the motor\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eExtend the service life of HEPA and carbon filters\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eLower long-term maintenance costs\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eCompatible With\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003cspan\u003eSentry Air Systems Model 300 Portable Fume Extractors\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eSentry Air Systems 300 Series Air Cleaners\u003c\/span\u003e\u003c\/li\u003e\n\u003cli\u003e\u003cspan\u003eVarious welding, soldering and laboratory filtration systems using Model 300 filter configurations\u003c\/span\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong\u003ePackage Includes (12) Model 300 Replacement Pre-Filter Pads\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eOrdering Notes\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eChoose between standard particulate pre-filters or activated carbon pre-filter pads depending on your application requirements and contaminant type.\u003c\/span\u003e\u003cspan\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003ch4\u003e\u003cspan\u003e\u003cb\u003eSpecifications\u003c\/b\u003e\u003c\/span\u003e\u003c\/h4\u003e\n\u003ctable cellpadding=\"0\" cellspacing=\"0\" height=\"160\" style=\"width: 66.131907%;\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" style=\"width: 35.599284%;\"\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eSpecification\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"middle\" style=\"width: 64.400716%;\"\u003e\n\u003cp\u003e\u003cspan\u003e\u003cb\u003eDetails\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" style=\"width: 35.599284%;\"\u003e\n\u003cp\u003e\u003cspan\u003eProduct Type\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"middle\" style=\"width: 64.400716%;\"\u003e\n\u003cp\u003e\u003cspan\u003eReplacement Pre-Filter Pads\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" style=\"width: 35.599284%;\"\u003e\n\u003cp\u003e\u003cspan\u003eCompatible Systems\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"middle\" style=\"width: 64.400716%;\"\u003e\n\u003cp\u003e\u003cspan\u003eSentry Air Systems Model 300 Series\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" style=\"width: 35.599284%;\"\u003e\n\u003cp\u003e\u003cspan\u003eFilter Style\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"middle\" style=\"width: 64.400716%;\"\u003e\n\u003cp\u003e\u003cspan\u003eDisposable Pad\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" style=\"width: 35.599284%;\"\u003e\n\u003cp\u003e\u003cspan\u003eFiltration Stage\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"middle\" style=\"width: 64.400716%;\"\u003e\n\u003cp\u003e\u003cspan\u003ePre-Filter\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" style=\"width: 35.599284%;\"\u003e\n\u003cp\u003e\u003cspan\u003ePack Quantity\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"middle\" style=\"width: 64.400716%;\"\u003e\n\u003cp\u003e\u003cspan\u003e12 Pads\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" style=\"width: 35.599284%;\"\u003e\n\u003cp\u003e\u003cspan\u003eAvailable Types\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"middle\" style=\"width: 64.400716%;\"\u003e\n\u003cp\u003e\u003cspan\u003eStandard Particulate \/ Carbon\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd valign=\"middle\" style=\"width: 35.599284%;\"\u003e\n\u003cp\u003e\u003cspan\u003eInstallation\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd valign=\"middle\" style=\"width: 64.400716%;\"\u003e\n\u003cp\u003e\u003cspan\u003eTool-Free Replacement\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eFilter Efficiency\u003c\/h4\u003e\n\u003ch3\u003eCalculating Filter Efficiency\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eEfficiency of a filter is calculated by measuring the particle count downstream and upstream from the filter. \u003c\/strong\u003eThe downstream count is divided by the upstream count then this number is subtracted from one then multiplied by 100 to create an efficiency percentage with this formula:\u003c\/p\u003e\n\u003cp\u003e\u003cimg style=\"float: none;\" alt=\"Filter Efficiency Equation\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0356\/8248\/4360\/files\/filter-efficiency_480x480.png\"\u003e\u003c\/p\u003e\n\u003ch3\u003eFilter Efficiency Comparison Chart\u003c\/h3\u003e\n\u003ctable style=\"width: 57.932264%;\" border=\".5\" cellpadding=\".5\" cellspacing=\".5\" height=\"259\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 52.86783%;\" align=\"center\" height=\"50\" valign=\"center\" width=\"300\"\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eFilter\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 45.63591%;\" align=\"center\" height=\"50\" valign=\"center\" width=\"300\"\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eEfficiency and Particle Size\u003c\/strong\u003e\u003c\/p\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 52.86783%;\" align=\"center\" height=\"50\" valign=\"center\" width=\"300\"\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eASHRAE\u003c\/strong\u003e\u003cbr\u003eHigh Efficiency\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 45.63591%; text-align: left;\" align=\"center\" height=\"50\" valign=\"center\" width=\"300\"\u003eUp to 95% on particles as small as 0.5 microns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 52.86783%;\" align=\"center\" height=\"50\" valign=\"center\" width=\"300\"\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eHEPA\u003c\/strong\u003e\u003cbr\u003eHigher Efficiency | Industry Standard\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 45.63591%; text-align: left;\" align=\"center\" height=\"50\" valign=\"center\" width=\"300\"\u003eUp to 99.97% on particles as small as 0.3 microns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"width: 52.86783%;\" align=\"center\" height=\"50\" valign=\"center\" width=\"300\"\u003e\n\u003cp style=\"text-align: left;\"\u003e\u003cstrong\u003eULPA\u003c\/strong\u003e\u003cbr\u003eHighest Efficiency\u003c\/p\u003e\n\u003c\/td\u003e\n\u003ctd style=\"width: 45.63591%; text-align: left;\" align=\"center\" height=\"50\" valign=\"center\" width=\"300\"\u003eUp to 99.9995% on particles as small as 0.12 microns\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eParticle Sizes\u003c\/h3\u003e\n\u003cp\u003eTo illustrate the miniscule size of particles that these filters capture, one micron is equal to one millionth of a meter. The human eye cannot see particles smaller than 10 microns. Sizes of common particles are as follows:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHuman hair: 100-150 microns in diameter\u003c\/li\u003e\n\u003cli\u003eEmissions 1 – 150 microns\u003c\/li\u003e\n\u003cli\u003eDust: 100 microns\u003c\/li\u003e\n\u003cli\u003ePollen: 10 - 100 microns\u003c\/li\u003e\n\u003cli\u003eSpores: 3 - 40 microns\u003c\/li\u003e\n\u003cli\u003eMold 3 - 12 microns\u003c\/li\u003e\n\u003cli\u003eBacteria: 0.3 - 60 microns\u003c\/li\u003e\n\u003cli\u003ePure oxygen 0.005 microns\u003csup\u003e4\u003c\/sup\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv style=\"text-align: left;\" align=\"center\"\u003e\u003cimg alt=\"\" src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0356\/8248\/4360\/files\/ParticleSize-chart.jpg\"\u003e\u003c\/div\u003e\n\u003cdiv style=\"text-align: left;\" align=\"center\"\u003e\u003cbr\u003e\u003c\/div\u003e","brand":"Sentry Air Systems","offers":[{"title":"Default Title","offer_id":53489848615096,"sku":"SS-300-CFP","price":174.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0532\/3735\/0584\/files\/pre-filter-pad-1.jpg?v=1779301392","url":"https:\/\/sperscientific.com\/products\/sentry-air-model-300-pre-filter-pads-12-pack","provider":"Sper Scientific Instruments","version":"1.0","type":"link"}