The HPD II decreases the pressure of high purity, high-pressure gas to near atmospheric pressures, allowing for accurate sampling of aerosol particle size channels of 0.1 m and above by PMS particle counters with a volumetric sample flow rate of 1.0 CFM.
The HPD operates by diffusing some of the gas out of the system, allowing the particle counter’s flow-metering mechanism to function properly. The HPD II is compatible with PMS particle counters, including AirNet, IsoAir, Lasair Pro, and Lasair III.
The HPD II successfully reduces the pressure of a gas line from 150 psi to atmospheric pressure and is compatible with non-toxic, nonflammable gases such as Clean Dry Air (CDA), nitrogen (N2), argon (Ar), and carbon dioxide (CO2).
Two configurations of HPD II are offered:
- HPD II-100 for gas lines between 40 and 100 psi
- HPD II-150 for gas lines between 75 and 150 psi
Source: Particle Measuring Systems
| Particle Counter |
CDA |
N2 |
Ar |
CO2 |
O2/He/Ne/H2 |
| Airnet |
Y |
Y |
N |
N |
N |
| Lasair III 110 |
Y |
Y |
N |
N |
N |
| Lasair III 310 |
Y |
Y |
Y |
N |
N |
| IsoAir 310P |
Y |
Y |
Y |
N |
N |
| IsoAir Pro-E/Plus |
Y |
Y |
Y |
Y |
N |
| Lasair Pro |
Y |
Y |
Y |
Y |
N |
| HPGP 101-C |
Y |
Y |
Y |
Y |
Y |
Benefits
- Two types for reducing high-pressure gas from 40 to 100 psi or 75 to 150 psi to atmospheric pressure
- Able to measure particles as tiny as 0.1 µm in CDA, nitrogen, carbon dioxide, or argon when used in combination with a Lasair II-110 or Lasair III-110 particle counter
- Use with nitrogen (N2), carbon dioxide (CO2), argon (Ar), clean dry air (CDA), or other non-toxic inert gases (see table for compatible gases)
- No external flow meters are needed
- Using atmospheric pressure particle counters to monitor pressured gases economically
Features
- Developed specifically to work with the 1.0 CFM aerosol particle counter
- No moving parts to wear
- Specifically intended to be used with the 1.0 CFM aerosol particle counter
- The particle counter is not affected by interruptions in the gas supply
- Stainless steel construction
Applications
- AirNet: 310, 510
- IsoAir: 310P, Pro-E, Pro-Plus
- Lasair Pro 310
- Lasair III: 110, 310, 310P
Specifications
Source: Particle Measuring Systems
| . |
. |
| Pressure |
See additional table below |
| Applicable Sample Flow Rate |
1.0 CFM |
| Particle size range |
0.1 – 1.0 μm |
| Environment |
Temperature: 50 – 90 ºF (10 – 32 ºC). Humidity: Non-condensing. |
| Material |
Enclosure: 316 L stainless steel body, exhaust filter
Gaskets: 316 stainless steel, Buna-N O-rings |
| Inlet fitting |
Male 4-VCR fitting, #4 size, class 316 L stainless steel with Ruby orifice |
| Exhaust fitting |
3/8” ID with O-ring seal |
| Tubing length |
1 m (39.4 in) maximum |
| Dimensions (h, w, d) |
5.1 x 9.8 x 5.5 in (13 x 25 x 14 cm) |
| Weight |
5.8 lb (2.6 kg) |
| Compatible instruments |
See the Applications section on the previous page |
| |
Flow Rate |
CDA |
Nitrogen |
Argon |
CO2 |
| HPD II 100 |
1.0 CFM |
40-100 psi |
40-100 psi |
40-100 psi |
40-100 psi |
| HPD II 150 |
1.0 CFM |
75 - 150 psi |
75 - 150 psi |
75 - 150 psi |
75 - 150 psi |
System components included: mounting brackets and exhaust tubing to particle counter
Not included: particle counter, ISPs sample tubing, communications cables, PC, FacilityNet or Pharmaceutical Net software