227a/227b | data sheet • 227b size 1: 0.3 microns; size 2: se-lectable - 0.5, 1, 3, or 5 • 227a size 1: 0.5 microns; size2: se-lectable - 0.7, 1, 3, or 5 • weight: 2.13 pounds (0.97 kg) • light source: laser diod • 0.3 or 0.5 micron sensitivity at 0.1 cfm • counts 2 sizes imultaneously • rs-232 to computer or外接印表机 • battery operation: 8 hours continuous, nimh • data storage: 200 records • 可外接温湿度计(需選購)。 • 通过ce及jis认证。一年保固期。 • 校正为nist traceable可追溯美国国家标准规范。适合用在无尘室环境、filter leaking test、filter efficiency test气体量测等，体积轻薄短小、重量轻携带及操作方便