For the in-house oil-analysis program that wants lab-grade ASTM D7647 results on the benchtop — turnaround in hours instead of days, control of the methodology, and same-instrument calibration the operator’s own technicians can perform.
An in-house particle counter is an oil-analysis instrument installed at the equipment owner’s own site — not at a third-party commercial laboratory. The owner runs samples on their own instrument, sees results within hours, and operates the program with their own technicians using their own SOPs. The category exists because the alternative — sending every sample to a commercial oil-analysis service — has limits that some operators outgrow.
The economics tip in-house at moderate volume. If your operation runs more than ~150 oil samples per month through a commercial service at typical North American per-sample pricing, a benchtop ASTM D7647 instrument typically pays for itself within 18–24 months. Beyond the dollar break-even, the operational benefits compound:
The decision to bring particle counting in-house is not the same as switching to portable counters. Portable counters give you indicative ISO codes on undiluted samples; they cannot run ASTM D7647 with auto-dilution, and they routinely produce inflated readings on used hydraulic and gear oils. An in-house program that wants reliable, lab-equivalent ISO 4406 results needs an automated benchtop unit — not a portable one.
Three options. They solve different problems.
| Send-out (commercial lab) | Portable on-equipment | In-house benchtop (CS-APC-22M) | |
|---|---|---|---|
| Result turnaround | 5–10 business days | Minutes | Hours (same day) |
| Method | ASTM D7647 (if lab uses it) | Single-sample optical, no dilution | Full ASTM D7647-10 with auto-dilution |
| Soft-particle handling | Yes (with dilution) | No — inflated counts on water/varnish/additive-laden oils | Yes — 75/25 toluene/IPA dilution |
| ISO 11171:2022 calibration | Yes (lab’s instrument) | Often not traceable | Yes, on-site annual calibration |
| Cost-per-sample at scale | $$ (per-sample fees) | $ (capital only) | $ (capital + minimal consumables) |
| Owner control of method | No | Limited | Full |
| Best for | Low-volume programs, occasional sampling | Field spot-checks on equipment | Reliability programs with 50+ samples/month |
The three options are not mutually exclusive. A common pattern in mature reliability programs: portable counters in the field for go/no-go decisions, an in-house benchtop for the regular ISO 4406 trend program, and send-out only for tests the benchtop doesn’t cover (ICP-AES elemental, FT-IR oxidation, KF water).
The CS-APC-22M is the in-house unit in the CINRG line. It runs the identical methodology, identical KLOTZ LDS 45/50 sensor, identical 4–70µm measuring range, and identical ASTM D7647-10 auto-dilution as our production-floor CS-APC-3 — in a 16½″ × 20½″ × 24″ benchtop footprint with a 24-position sample tray (22 sample + 1 cleaning + 1 verification).
What makes it work for an in-house program specifically:
Gearbox lubricant sampling on dozens to thousands of turbines, with turnaround pressure on bearing-failure indications.
Hydraulic and engine-oil monitoring across trucking, mining, and rail fleets with hundreds of sumps to track.
Compressor, turbine, and large-bearing reservoir monitoring under reliability-centred maintenance programs.
Haul-truck and shovel hydraulic-system trending, where on-site labs are common and downtime cost is extreme.
QC on new lubricant batches and finished-machine sumps — checking cleanliness against ISO 4406 spec before shipment.
Turbine, transformer, and bearing-oil cleanliness monitoring across multi-station fleets.
An in-house particle counter is an oil-analysis instrument installed at the equipment owner’s site — a wind-farm operator, fleet maintenance shop, refinery, mining operation, or industrial-plant reliability program — rather than at a third-party commercial laboratory. It lets the owner run their own ISO 4406 cleanliness counts on a same-day timeline without sending samples to an outside lab.
Three reasons: turnaround time (hours instead of 5–10 business days), per-sample cost at scale (a benchtop instrument pays for itself within 12–24 months above ~150 samples/month), and control (you set the methodology, validate the calibration, and own the data). The break-even point depends on outside-lab pricing in your region and your sample volume.
Portable counters (Beckman PODS, Hiac Royco, MP Filtri LPA) test undiluted samples in the field — they’re answering "is the equipment running clean?" on the spot. Benchtop in-house counters (CINRG CS-APC-22M) run the full ASTM D7647-10 workflow with auto-dilution: water, varnish precursors, and additive interference get masked before counting. The benchtop unit produces lab-grade ISO codes equivalent to a commercial oil-analysis service.
For the CINRG CS-APC-22M: 16½ inches wide × 20½ inches high × 24 inches deep (42 × 53 × 61 cm), 68 lb (31 kg). Fits a standard laboratory bench. Power 100–230 VAC selectable from a single outlet. Solvent handling follows your site’s standard organic-solvent protocol (toluene/IPA storage and venting).
CINRG instruments are the only laser particle counters that support full on-site calibration by the customer. CINRG provides the CINSTAN Calibration Kit (CS-CINSTAN-CFK), a low-cost calibration hardware kit, a detailed step-by-step SOP, and an automated Excel template. A trained technician performs the annual sizing-calibration without shipping the instrument anywhere. Pre-calibration sensor-noise verification confirms signal-to-noise ratio is acceptable before calibration begins.
The CINRG CS-APC-22M processes 3.5 minutes per sample with default parameters. A 22-sample tray completes in about 1¼ hours unattended. 130–140 samples per 8-hour shift across multiple trays. For an in-house program processing 50–200 samples per month, throughput is rarely the bottleneck.
Routine operation is pour-and-click: pour homogenized oil into cups, place cups in the tray, import a CSV batch file (or build one in the CINRG software), click Run. The deeper parameter settings (cleaning thresholds, IVL bounds, dilution ratios) are exposed only in Admin Mode and are configured once at installation. CINRG includes operator training and the calibration SOP with every system.
Tell us about your sample volume, fluid types, and program structure. A CINRG engineer will help you scope the right configuration and the right pace for the rollout.
Tell us about your throughput, your test methods, and your facility. A CINRG engineer will help you scope the right configuration — and put you in touch with your nearest dealer.