Every important claim should have a source, qualifier or verification action.

Historical product references

1. Manufacturing.net / Terra Universal archival product announcement — identifies the M2001 as an MSP Corporation ultrapure cleanroom fogger and describes LN₂/water operation, residue characteristics and approximately 45 minutes of output.
2. Norda M2001 archival product page — publishes dimensions, weight, liquid capacities, power, hose/wand and application information. This is treated as secondary archival evidence, not revision-specific service documentation.

Manufacturer product references

1. AP35 passive/dewar-style LN₂ cleanroom fogger
2. AP30 self-pressurized LN₂ cleanroom fogger
3. CRF6 ultrasonic cleanroom fogger
4. CRF3 ultrasonic cleanroom fogger

Recognized cryogenic and oxygen-deficiency references

1. National Academies / NCBI: Prudent Practices in the Laboratory — working with laboratory equipment
2. NIH: Oxygen Monitoring Devices
3. OSHA: Oxygen-deficient atmospheres

How conflicting information is resolved

1. Exact unit nameplate and revision-specific documentation.
2. Controlled manufacturer or service documentation tied to that revision.
3. Current manufacturer product pages for current models.
4. Original or near-original archival descriptions.
5. Reseller copies and search-indexed summaries.

Lower-level sources can identify questions, but they should not override the exact unit or a controlled document.