在高于海平面的压力下(如25 – 100 psi)对气体进行采样，对于粒子计数器来说是一个挑战。将压缩空气或气体连接到粒子计数器上，可能会破坏流量计系统，并可能损坏仪表。
高压扩散器(HPDs)的开发着眼于解决压缩气体中的粒子计数问题。HPDs通过将部分空气/气体向系统外扩散，将气体压力降至标准大气压，这样Lasair III颗粒计数器的流量计量系统即可正常工作。
特点
No moving parts to wear
Connects vis male 4-VCR fitting
Exhaust filer prevents possible room contamination
Mounting clamps supplied
Stainless steel construction
优点
Measures gases from 25 to 100 psi (60 to 100 psi for 100LPM)
No external flow meters needed
Low contamination, < 5% of ISO Class I or II cleanliness
Economical monitoring of pressurized gases with atmospheric pressure particle counters
Can be used with Clean Dry Air, Argton, Nitrogen, or other non-toxic inert gases
Four different versions for 0.1 CFM, 1.0 CFM, 50 LPM, and 100 LPM flow rates
应用
Compressed Gas
