--- title: "Parker icountPD Fluid & Fuel Quality | Aethair" description: "Parker icountPD inline laser particle detector in the Aethair sensor catalog: ISO 4406 codes for hydraulic, lube-oil, and fuel systems via Thiamis." url: https://aethair.io/sensors/parker-fluid-fuel-quality/ --- Sensors · Fluid & Fuel Quality # Parker icountPD Fluid & Fuel Quality Parker icountPD inline/online laser particle detector for hydraulic, lube-oil, and fuel systems; laser-diode optical particle counting reports fluid cleanliness as ISO 4406 codes (also NAS 1638 / AS4059) across four size channels >4/>6/>14/>30 µm(c), to ±1 ISO code, over RS-232. [Schedule a call](https://calendly.com/d/ctdd-mkr-v9v/aethair-demo-website) [Build a Configuration](https://aethair.io/build/?params=particle_count_fluid) At a glance **1** parameter **1** model [**Connects via Thiamis** RS-232 · ASCII](https://aethair.io/products/thiamis/) Measures ## What the Parker icountPD Measures 1 parameter, linked to its page on sensors, units, and standards. [Fluid Particle Count (ISO 4406) ISO 4406 code >4 µm(c), >6 µm(c), >14 µm(c), >30 µm(c)](https://aethair.io/parameters/particle_count_fluid/) [Connects via **Thiamis**](https://aethair.io/products/thiamis/) Wired interface [RS-232 ASCII](https://aethair.io/products/thiamis/#port-rs232) Models ## Parker icountPD Models 1 model, with what it measures and the ranges from its datasheet. | Model | Description | Measures & specs | | - | - | - | | **icountPD** | Permanently mounted online laser-diode particle detector for hydraulic and lube/fuel circuits. It reports ISO 4406 (and NAS 1638 / AS4059) cleanliness codes at >4/>6/>14/>30 µm(c) to ±1 ISO code. RS-232 serial plus 4–20 mA, 0–5 V, and CAN-bus (J1939) outputs; inline or remote-mount, with an optional moisture/temperature sensor on non-fuel versions. | [Fluid Particle Count (ISO 4406) >4 µm(c), >6 µm(c), >14 µm(c), >30 µm(c)](https://aethair.io/parameters/particle_count_fluid/) | Standards ## Standards for What It Measures Standards that set limits on the parameters it reports, plus any method standard the instrument is built to. Built to [ISO 4406: fluid cleanliness coding (SAE AS4059; NAS 1638 legacy)](https://aethair.io/standards/iso_4406/) [ISO 11171: calibration of automatic particle counters for liquids](https://aethair.io/standards/iso_11171/) Solutions ## Where the Parker icountPD Is Used Solutions whose recommended configuration uses this instrument or whose standards it is built to, followed by solutions whose core panel it partly measures. ### [Hydraulic & Fuel Cleanliness](https://aethair.io/solutions/industrial-fluids/) ISO 4406 oil cleanliness and aviation fuel On the platform ## What the Parker icountPD Gets From Aethair Connected through Thiamis, its readings arrive in the same Environet account as Aethair's own monitors. ### [Live data and alerts](https://aethair.io/platform/environet/) [Environet](https://aethair.io/platform/environet/) shows the instrument live and alerts the people you choose by email, SMS, and webhook, at the thresholds you set. [Noesis](https://aethair.io/platform/noesis/) sets up a dashboard, a report, or an alert from a plain-text request. ### [Compliance reports](https://aethair.io/platform/reports/) [Aethair Reports](https://aethair.io/platform/reports/) produces scheduled or on-demand reports from the instrument's readings, as a PDF or secure link. Templates cover Aethair Blue, WELL v2, cabin air (ISO 23875), and the CMS-2567 healthcare codebook (ASHRAE 170), or you can report against custom limits such as OSHA PELs, NAAQS, EPA guidance, or your own program limits. ### [Dashboards and the app](https://aethair.io/platform/dashboards/) Environet dashboards and the [Aethair App](https://aethair.io/platform/app/) show the instrument's readings just like any Aethair device. The occupant-facing [Aethair Dashboards](https://aethair.io/platform/dashboards/) status display is built around Aethair IAQ and Aethair PRO. Similar ## Other Fluid & Fuel Quality ### [Parker Velcon](https://aethair.io/sensors/parker-velcon-fluid-fuel-quality/) [Fluid & Fuel Quality](https://aethair.io/sensors/parker-velcon-fluid-fuel-quality/) [The Parker Velcon FDPM (Flow Differential Pressure Module) is used on aviation-fuel filter vessels.…](https://aethair.io/sensors/parker-velcon-fluid-fuel-quality/) Questions ## Parker icountPD FAQ How does the Parker icountPD report fluid cleanliness? It uses laser-diode optical detection of the particles in a live oil or fuel sample and expresses the result as ISO 4406 cleanliness codes, one code per size channel at >4, >6, >14, and >30 µm(c), with a stated performance of ±1 ISO code. The same measurement can also be reported as NAS 1638 or AS4059 classes. What do the four size channels mean? Each channel is a cumulative particle-size threshold calibrated to ISO 11171 (the '(c)' suffix): >4 µm(c), >6 µm(c), >14 µm(c), and >30 µm(c). The >4/>6/>14 codes are the standard three-part ISO 4406 code shown on the front display; the fourth channel, >30 µm(c), is a coarse-particle code Parker adds for fuel/aviation cleanliness and carries on the serial and CAN outputs. Thiamis reads all four; mineral-oil units report only the three standard channels. How does Thiamis connect to the icountPD? Over the icountPD's RS-232 serial output, reporting in ISO 4406. The icountPD also provides 4–20 mA, 0–5 V, and CAN-bus (J1939) outputs, but the Thiamis integration uses the RS-232 connection. Does the icountPD measure water or moisture content? Non-fuel versions can be fitted with an optional moisture (%RH) and temperature sensor, but the Thiamis integration ingests only the ISO 4406 particle-cleanliness codes, not moisture or temperature. Which fluids and operating conditions does it suit? Mineral and hydraulic oils, phosphate-ester (fire-resistant) fluids, and aviation/petroleum fuels, at 2–420 bar and fluid viscosity of 1–500 cSt, with a measurement cycle of roughly 30 seconds. Sources: [ph.parker.com](https://ph.parker.com/us/en/product-list/icountpd-online-particle-detector) · [www.parker.com](https://www.parker.com/content/dam/Parker-com/Literature/Hydraulic-Filter-Division-Europe/Websphere-Literature/BROCHURE-icountPD-Particle-Detector.pdf)