Home · FSC 6630 Chemical Analysis Instruments · NSN 6630-01-641-1591
NSN 6630-01-641-1591 — Water Quality Analysis Set
NIIN 01-641-1591 · unit of issue EA · AAC L (not stocked, local purchase) · source of supply SMS
Buying rhythm
from 7 government buys since 2025
The government has bought this item about every 2 months (regular, gaps vary ±60%). Last buy Jul 31, 2026. If the rhythm holds, the next one falls between Sep 15, 2026 and Dec 16, 2026: a buy is due about now.
How well this works: for regular items, "next buy about one typical gap after the last, give or take 121 days" caught the actual next buy 42% of the time across 15,953 past buys, against 22% for a fixed "one year later" guess. A rhythm, not a schedule: DLA buys when stock and demand say so. Every item due for a buy now.
NSN 6630-01-641-1591 is the national stock number for a water quality analysis set in federal supply class 6630 (Chemical Analysis Instruments). It cross-references to 3 manufacturer part numbers from 3 CAGE codes, including Hach Company, Defense Logistics Agency Directorate Of Medical Materiel Defense Supply Center Philadelphia, Defense Medical Standardization Board; the primary is 1482535. The unit of issue is EA and the FLIS list price is $7,314.35.
The U.S. government has bought this item 19 times on record, 19 of them in the last 24 months, most recently on July 31, 2026 at $5,159.00 each from Szy Holdings, LLC. The median unit price paid over 36 months is $5,104.00. No seller has confirmed stock of it here in the last 60 days; watching the number is free and the first listing triggers an alert.
3
part numbers from 3 CAGEs
0
open solicitations, all agencies
19
government buys in 24 months · median $5,104.00
0
sellers with confirmed stock
Cross-references
Part numbers filed against this stock number, with the manufacturer (CAGE) and the FLIS reference codes.
| Part number | CAGE | Manufacturer | Reference | Variation |
|---|---|---|---|---|
| 2569600 | 91224 | Hach Company | 3 · Design control (vendor) | 2 · Fully interchangeable |
| 1482535 | 89875 | Defense Logistics Agency Directorate Of Medical Materiel Defense Supply Center Philadelphia | 5 · Secondary reference | 1 · Not fully interchangeable |
| 6630NCM173691 | 64616 | Defense Medical Standardization Board | 5 · Secondary reference | 1 · Not fully interchangeable |
Government demand
Nothing open right now. Last government buy Jul 31, 2026. Watch this NSN and we will email you when it is solicited.
What the government paid
| Date | Vendor | Qty | Unit cost | Amount | Buyer | Reference |
|---|---|---|---|---|---|---|
| Jul 31, 2026 | Szy Holdings, LLC 0AG09 | 2 | $5,159.00 | Dla | SPE2DH26P1099 | |
| Apr 30, 2026 | Midland Scientific Inc 6P701 | 1 | $5,160.00 | Dla | SPE2DH26P0732 | |
| Mar 13, 2026 | Midland Scientific Inc 6P701 | 1 | $5,160.00 | Dla | SPE2DH26V1162 | |
| Feb 3, 2026 | Szy Holdings, LLC 0AG09 | 2 | $5,163.00 | Dla | SPE2DH26P0414 | |
| Jan 14, 2026 | Szy Holdings, LLC 0AG09 | 3 | $5,169.00 | Dla | SPE2DH26P0357 | |
| Aug 28, 2025 | Szy Holdings, LLC 0AG09 | 1 | $5,170.99 | Dla | SPE2DH25V4280 | |
| Aug 26, 2025 | Szy Holdings, LLC 0AG09 | 1 | $5,170.99 | Dla | SPE2DH25V4243 | |
| Aug 6, 2025 | Midland Scientific Inc 6P701 | 1 | $5,174.00 | Dla | SPE2DH25V3919 | |
| Jul 22, 2025 | Szy Holdings, LLC 0AG09 | 1 | $5,175.00 | Dla | SPE2DH25V3726 | |
| Jul 7, 2025 | Midland Scientific Inc 6P701 | 1 | $5,086.00 | Dla | SPE2DH25V3472 | |
| Jun 18, 2025 | Midland Scientific Inc 6P701 | 3 | $5,086.00 | Dla | SPE2DH25V3213 | |
| Apr 18, 2025 | Szy Holdings, LLC 0AG09 | 1 | $5,087.00 | Dla | SPE2DH25P0820 | |
| Apr 16, 2025 | Szy Holdings, LLC 0AG09 | 1 | $5,087.00 | Dla | SPE2DH25V2457 | |
| Mar 11, 2025 | Szy Holdings, LLC 0AG09 | 1 | $5,087.00 | Dla | SPE2DH25V1995 | |
| Mar 6, 2025 | Szy Holdings, LLC 0AG09 | 1 | $5,087.48 | Dla | SPE2DH25V1928 | |
| Feb 19, 2025 | Szy Holdings, LLC 0AG09 | 1 | $5,090.00 | Dla | SPE2DH25V1684 | |
| Feb 7, 2025 | Midland Scientific Inc 6P701 | 1 | $5,093.60 | Dla | SPE2DH25V1508 | |
| Feb 5, 2025 | Midland Scientific Inc 6P701 | 1 | $5,093.60 | Dla | SPE2DH25P0487 | |
| Jan 27, 2025 | Szy Holdings, LLC 0AG09 | 1 | $5,104.00 | Dla | SPE2DH25V1229 |
Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices. 19 buys on record in total.
Sellers with confirmed stock
No seller has confirmed stock on this NSN in the last 60 days. Watch it and we will email you when one does, or request a quote on 1482535.
Listings appear here only while the seller has confirmed them within 60 days. Sellers: list this part free.
DLA management data
- FLIS unit price
- $7,314.35
- Unit of issue
- EA
- Acquisition advice
- L — Not stocked, local purchase
- Source of supply
- SMS
- Shelf life code
- H
- Effective
- Oct 1, 2025
Item characteristics
- Unit Package Quantity
- 1
- Usage Design
- MONITOR KEY WATER QUALITY PARAMETERS
- Part Name Assigned By Controlling Agency
- PORTABLE WATER QUALITY ANALYSIS SET
- Special Features
- ECONOMICAL PORTABLE LAB MONITORS KEY WATER QUALITY PARAMETERS SUCH AS CHLORINE (0-3.4 MG/L) AND NITRATE (0-40 MG/L) PLUS TOTAL COLIFORMS AND E. COLI (PRESENCE-ABSENCE METHOD). INCLUDES ALL REAGENTS FO
About this page
An NSN is 13 digits: the 4-digit Federal Supply Class and the 9-digit NIIN. Cross-references come from the federal logistics record; demand from DLA DIBBS, SAM.gov and FPDS; ADs from the Federal Register. Refreshed nightly. Market Pulse shows the whole market.
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