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Vacuum probe sampler removes micron-sized particles from sensitive surfaces, without damage to the surface. The probe has a critical orifice to ensure an optimum airflow rate that disturbs the boundary layer of air and raises bacteria from the surface into the probe with the moving air stream.
Operational capabilities, methods of deployment command and control, areas of lunar operation, and television viewability of Surveyor lunar surface sampler instrument
Advanced soil sampler technology
Design criteria for generating engineering prototypes of lunar and planetary soil samplers and mechanical sample processors
Design parameters and breadboard models for advanced soil samplers
Soil mechanics surface sampler and analysis of samples from Surveyor 7 Tycho landing site
Soil mechanics surface sampler of Surveyor 3 for testing lunar surface, describing modifications for installation and results and analyses
Design, construction, and flight testing of high altitude cryogenic sampler of sorption type
Lunar soil data from Surveyor surface sampler experiments
Planetary soil sampler prototypes for biological studies from unmanned space probes
Surveyor 7 lunar surface sampler, obtaining soil and rock data
Aerobee rocket-borne cryogenic air samplers heat exchanger design by mathematical model and computer solution
Design and fabrication of plastic vacuum probe surface sampler to determine microbial population
Development and characteristics of vacuum probe surface sampler for obtaining particulate contamination on surfaces
Aerobee 150 sounding rocket cryogenic air sampler, discussing design, operation and air constituents reaction to cooling
The sampler utilizes permanent magnets and soft metal pole pieces to connect the cone/filter assembly to the sampling head and vacuum supply. The cone/filter assembly is packaged in a plastic container and presterilized so that the need for any human contact during the sampling procedure is completely eliminated. Microbiological tests have demonstrated that the sampling efficiency is not affected by the magnetic coupling apparatus and that the probe appears to function as efficiently as the conventional plastic and Sandia vacuum probes.
A vacuum probe surface sampler is described for rapidly sampling relatively large surface areas which possess relatively light loading densities of micro-organism, drug particles or the like. A vacuum head with a hollow handle connected to a suitable vacuum source is frictionally attached to a cone assembly terminating in a flared tip adapted to be passed over the surface to be sampled. A fine mesh screen carried by the vacuum head provides support for a membrane filter which collects the microorganisms or other particles. The head assembly is easily removed from the cone assembly without contacting the cone assembly with human hands.
High volume air samplers (hi vols) are described which utilize a brush-type electric motor to power the fans used for pulling air through the filter. Anomalously high copper values were attributed to removal of copper from the commutator into the air stream due to arcing of the brushes and recirculation through the filter. Duplicate hi vols were set up under three operating conditions: (1) unmodified; (2) gasketed to prevent internal recirculation; and (3) gasketed and provided with a pipe to transport the motor exhaust some 20 feet away. The results of 5 days' operation demonstrate that hi vols can suddenly start emitting increased amounts of copper with no discernible operational indication, and that recirculation and capture on the filter can take place. Copper levels found with hi vols whose exhaust was discharged at a distance downwind were among the lowest found, and apparently provides a satisfactory solution to copper contamination.