General Characteristics Item Description: THE HEAT STRESS MONITOR IS A COMPACT, PORTABLE AREA HEAT STRESS MONITOR WHICH COMPUTES THE WET BULB GLOBE TEMPERATURE (WBGT) INDEX. THE WBGT INDEX IS AN ACCEPTED METHOD FOR DETERMINING THE HEAT STRESS LEVEL IMPOSED ON AN INDIVIAL IN A GIVEN ENVIRONMENT. THE HEAT STRESS MONITOR MEASURES THREE PARAMETERS: AMBIENT OR DRY BULB TEMPERATURE, NATURAL WET BULB TEMPERATURE, AND GLOBE TEMPERATURE. IT'S POWER SOURCE CAN PROVIDE UP TO 100 HOURS OF CONTINUOUS OPERATION. DIMENSIONS INCLUDE LENGTH 10 INCHES, WIDTH 6.5 INCHES, AND HEIGHT 2 INCHES. IN
Identification
NSN: 6685-01-455-2204
NIIN: 014552204
FSC: 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
FSG: 66 — Instruments and Laboratory Equipment
General Description
The Heat Stress Monitor, cataloged under National Stock Number 6685-01-455-2204, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. Government technical data includes 1 specification, cited from the U.S. Government catalog. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
6685-01-455-2204
Item Name
Heat Stress Monitor
FSC / FSG
6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
Status
ACTIVE
General Characteristics Item Description
THE HEAT STRESS MONITOR IS A COMPACT, PORTABLE AREA HEAT STRESS MONITOR WHICH COMPUTES THE WET BULB GLOBE TEMPERATURE (WBGT) INDEX. THE WBGT INDEX IS AN ACCEPTED METHOD FOR DETERMINING THE HEAT STRESS LEVEL IMPOSED ON AN INDIVIAL IN A GIVEN ENVIRONMENT. THE HEAT STRESS MONITOR MEASURES THREE PARAMETERS: AMBIENT OR DRY BULB TEMPERATURE, NATURAL WET BULB TEMPERATURE, AND GLOBE TEMPERATURE. IT'S POWER SOURCE CAN PROVIDE UP TO 100 HOURS OF CONTINUOUS OPERATION. DIMENSIONS INCLUDE LENGTH 10 INCHES, WIDTH 6.5 INCHES, AND HEIGHT 2 INCHES. IN
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
Criticality Code
X
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
66-410D
3/9Design control — primary reference
U.S. Government activity
No interchangeability data on file.
Other items in FSC 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
Items in the same Federal Supply class. No interchangeability or substitution relationship is implied.
6685-00-001-1475
6685-00-001-1475 · Item name not on file
6685-00-001-1503
CONTROL,TOTALIZER
6685-00-001-1643
6685-00-001-1643 · Item name not on file
6685-00-001-1711
GAGE,PRESSURE,DIAL INDICATING
6685-00-001-2099
GAGE,VACUUM,INDICATING
6685-00-001-2100
6685-00-001-2100 · Item name not on file
6685-00-001-2101
6685-00-001-2101 · Item name not on file
6685-00-001-2102
6685-00-001-2102 · Item name not on file
Related Parts in Instruments and Laboratory Equipment
6685-00-001-1475
6685-00-001-1475 · Item name not on file
6685-00-001-1503
CONTROL,TOTALIZER
6685-00-001-1643
6685-00-001-1643 · Item name not on file
6685-00-001-1711
GAGE,PRESSURE,DIAL INDICATING
460R-K MONEL
6685-00-001-2099
GAGE,VACUUM,INDICATING
6685-00-001-2100
6685-00-001-2100 · Item name not on file
6685-00-001-2101
6685-00-001-2101 · Item name not on file
6685-00-001-2102
6685-00-001-2102 · Item name not on file
Frequently Asked Questions
What is NSN 6685-01-455-2204?
NSN 6685-01-455-2204 is a Heat Stress Monitor, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
What are the specifications of 6685-01-455-2204?
Key specifications for 6685-01-455-2204: General Characteristics Item Description: THE HEAT STRESS MONITOR IS A COMPACT, PORTABLE AREA HEAT STRESS MONITOR WHICH COMPUTES THE WET BULB GLOBE TEMPERATURE (WBGT) INDEX. THE WBGT INDEX IS AN ACCEPTED METHOD FOR DETERMINING THE HEAT STRESS LEVEL IMPOSED ON AN INDIVIAL IN A GIVEN ENVIRONMENT. THE HEAT STRESS MONITOR MEASURES THREE PARAMETERS: AMBIENT OR DRY BULB TEMPERATURE, NATURAL WET BULB TEMPERATURE, AND GLOBE TEMPERATURE. IT'S POWER SOURCE CAN PROVIDE UP TO 100 HOURS OF CONTINUOUS OPERATION. DIMENSIONS INCLUDE LENGTH 10 INCHES, WIDTH 6.5 INCHES, AND HEIGHT 2 INCHES. IN. 1 specification is documented in the U.S. Government catalog.
Is NSN 6685-01-455-2204 hazardous material?
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.