The Monitor,thermal Environment, cataloged under National Stock Number 6685-01-534-2644, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. 4 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6685-01-534-2644 |
| Item Name | Monitor,thermal Environment |
| FSC / FSG | 6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Reference | Meaning |
|---|---|
| 6685NCM051658 | 5/1 Secondary reference Defense Medical Standardization Board |
| 05-1788 | 5/1 Secondary reference U.S. Government activity |
| QT-36 | 3/9 Design control — primary reference U.S. Government activity |
| QUESTEMP 36 | 5/9 Secondary reference U.S. Government activity |
NSN 6685-01-534-2644 is a Monitor,thermal Environment, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
Key specifications for 6685-01-534-2644: Special Features: FURTHER SIMPLIFIES HEAT STRESS MANAGMENT EFFORTS BY PROVIDING USERS WITH REALTIME GUIDANCE ON STAY TIMES AND WORK/REST REGIMENTS; GUIDANCE IS BASED ON SCREENING CRITERIA FOR HEAT STRESS AS DEFINED IN THE ACGIH TLV HANDBOOK, US NAVY PHEL CHARTS AND EPRI ACTION LIMITS; CAN BE USED AS AN INDOOR THERMAL COMFORT MONITOR USING THE AIR VELOCITY PROBE, TEMPERATURE AND RH SENSOR READINGS SIMULTANEOUSLY; MEASUREMENT RANGES: TEMPERATURE -5 TO 100 DEGREE C, RELATIVE HUMIDITY 0 TO 100%, AIR VELOCITY 0 TO 20 M/S; Part Name Assigned by Controlling Agency: MONITOR THERMAL ENVIRONMENT QUESTEMP 36. 0 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.