NSN 6685-01-673-1244 · NIIN 016731244 · Part number RH520A
Extech Instruments · FSC 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments · FSG 66 — Instruments and Laboratory Equipment · CAGE 0LTF4
Government record, cited
NSN 6685-01-673-1244 — this item is cataloged by the U.S. Government under National Stock Number 6685-01-673-1244. Manufacturer of record part number: RH520A.
Also searched as6685-01-673-1244 ·
6685016731244 ·
NIIN 016731244 ·
01-673-1244 ·
FSC 6685 Pressure, Temperature, and Humidity Measuring and Controlling Instruments · CAGE 0LTF4 · RH520A · EW-23029-81
FSC: 6685 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
FSG: 66 — Instruments and Laboratory Equipment
Primary part number: RH520A
Manufacturer: Extech Instruments
General Description
The Indicator,temperature-Humidity,e, cataloged under National Stock Number 6685-01-673-1244, is classified within Federal Supply Class 6685 (Pressure, Temperature, and Humidity Measuring and Controlling Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Extech Instruments. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
6685-01-673-1244
Primary Part Number
RH520A
Item Name
Indicator,temperature-Humidity,e
FSC / FSG
6685 / 66 — Pressure, Temperature, and Humidity Measuring and Controlling Instruments
Manufacturer
Extech Instruments
Status
ACTIVE
Presentation Type
DIGITAL DISPLAY
Display Type
LIQUID CRYSTAL
Material
PLASTIC CASE
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Possible hazard — SDS may be required (DLA HMIC P)
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
6685-00-001-2099 · Item name not on file
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 6685-01-673-1244?
NSN 6685-01-673-1244 is a Indicator,temperature-Humidity,e, manufactured by Extech Instruments, classified under FSC 6685, Pressure, Temperature, and Humidity Measuring and Controlling Instruments. Status: active.
What part numbers are listed for NSN 6685-01-673-1244?
NSN 6685-01-673-1244 has 2 manufacturer part numbers on file: RH520A (Extech Instruments), EW-23029-81 (Cole-Parmer Instrument Company, Llc).
What are the specifications of RH520A?
Key specifications for RH520A: Presentation Type: DIGITAL DISPLAY; Display Type: LIQUID CRYSTAL; Special Features: 5 X 7.7 X 0.9 INCHES IN; Part Name Assigned by Controlling Agency: HUMIDITY AND TEMPERATURE RECORDER. 3 specifications are documented in the U.S. Government catalog.
Is NSN 6685-01-673-1244 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.