UnitedRS
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Hydraulic oil analysis — San Diego

Find the failure in the oil, before it reaches the deckplate.

United RS is a San Diego lab for hydraulic and rotating-equipment fluids. ISO 4406 particle counts, Karl Fischer water, and wear-metal analysis to NAS, ASTM, SAE, ISO and MIL-SPEC, with results back fast and shipping covered both ways.

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✓ We email a prepaid shipping label and cover shipping both ways.

ISO 4406 cleanliness report
As found
22/20/17
Target
16/14/11
≥4µm
≥6µm
≥14µm

Every report is a cleanliness code you can act on, not a wall of raw counts.

NASASTMSAEISOMIL-SPEC [XX]+ yrs [24–48 hr] turnaround Minutes from Naval Base San Diego

Why oil analysis

Contamination is the number-one killer of hydraulic systems.

Most hydraulic and bearing failures start in the fluid: particles scoring surfaces, water breaking down additives, wear metals climbing long before anything sounds wrong. A scheduled analysis catches it while it’s still a line on a report, not a rebuild on the deckplate.

01 / particles

Particle contamination

Abrasive debris that scores pumps, valves and servo clearances. Measured as an ISO 4406 / NAS 1638 cleanliness code.

02 / water

Water ingress

Even trace water corrodes surfaces and strips additives. Caught at ppm by Karl Fischer titration.

03 / wear

Component wear

Rising wear metals point to the exact component failing, weeks before it seizes. Read by elemental analysis.

The analysis

Six tests. One picture of your fluid’s health.

Order the full panel or just the checks you need. Each result comes back against the governing standard, in plain pass / marginal / critical language.

Particle count analysis

ISO 4406 · NAS 1638

Automatic particle counting that grades contamination as a cleanliness code, protecting pumps, valves and hydraulic systems.

Water contamination

Karl Fischer

Detects water down to ppm to head off corrosion and additive breakdown before it spreads through the system.

Oil condition & wear

Elemental

Identifies metal particles in the oil to monitor system wear and flag a failing component early.

Viscosity & density

ASTM D445

Confirms the fluid still carries the load and lubricates the way the system was designed to run.

Flashpoint

ASTM D92/D93

Pinpoints the ignition temperature to expose fuel dilution, cross-contamination and safety risk.

TAN / TBN analysis

Acid / base

Tracks acidity and reserve alkalinity so you change oil on condition, not on a guess.

How it works

From sample to answer in three steps.

  1. 01

    Request a quote

    Tell us your equipment and what you need tested. We scope it and email your prepaid shipping label, usually the same day.

  2. 02

    Pull and ship your sample

    Fill a clean, dry sample bottle (about 4 oz / 120 mL). Not sure what to use? Ask and we’ll spec it. Drop it in with the prepaid label — we cover shipping both ways.

  3. 03

    Get your report and next step

    Clear pass / marginal / critical results to NAS, ASTM, SAE, ISO and MIL-SPEC — plus what to do about it — in [24–48 hr].

Why United RS

Naval-grade standards, on a West-Coast clock.

MIL-SPEC & naval standards

Every analysis runs to NAS, ASTM, SAE, ISO and MIL-SPEC — the specs your naval and defense work already answers to.

Local, and fast

We’re in San Diego, minutes from the waterfront. No cross-country mail-in lag — samples in and results out on your schedule.

Shipping covered both ways

You never pay to ship samples in or back. Request a quote and the prepaid label lands in your inbox.

Request a quote

Tell us what you’re running.

Send your equipment and what you need tested. We’ll reply with pricing and a prepaid shipping label, usually the same day.

  • ✓ Shipping covered both ways
  • ✓ Results to NAS / ASTM / SAE / ISO / MIL-SPEC
  • ✓ [24–48 hr] typical turnaround

No cost to ship — we cover it both ways.

Questions

What sample container do I use?+

A new, clean, dry bottle around 4 oz / 120 mL works for most fluids. Not sure? Ask when you request your quote and we’ll spec the right bottle and volume for your equipment.

How fast are results?+

[Typically [24–48 hr] from sample receipt, with rush options available — confirm exact turnaround.]

Which standards do you test to?+

NAS, ASTM, SAE, ISO and MIL-SPEC, including ISO 4406 and NAS 1638 cleanliness codes.

Do you only serve San Diego?+

San Diego and Southern California are our fast-turn local zone. We also test mail-in samples from anywhere — and cover shipping both ways.

Request a quote