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part cleanliness

Contact-free cleanliness inspection of parts’ surfaces

Inspection of parts’ cleanliness at the touch of one button within in few seconds.

Measuring result: lowest and averaged cleanliness per part.
Automatic calibration on a clean reference surface..

Robust sensor – reproducible measuring result – optimal for mobile and flexible use at the process and in the laboratory.


SITA CleanoSpector brochure


fluorescence measuring device SITA CleanoSpector

Product description

The SITA CleanoSpector inspects the cleanliness of parts' surfaces. This ensures a high parts quality for processes of surface coating and surface treatment. The fluorescence measuring principle allows a reliable detection of slightest traces of contamination such as oils, grease or cooling lubricants. Furthermore, the SITA CleanoSpector can also measure the layer thickness e.g. of oils, anticorrosive agents or bonding agents.

The SITA CleanoSpector can be operated by hand or with the help of a stand which comes with the device. A robust construction and clearly designed operating structure ensures an optimal use at the plant and in the laboratory.

Cleanliness inspection:

After choosing an according surface profile, the operator starts the measurement at the touch of one button. The measurement takes about 1 – 10 seconds depending on the pre-determined average of measuring values. The cleanliness inspection is carried out especially on critical points on the part. The measuring device and the optional windows guide the operator through the parts control.

The measuring result is displayed in percent and shows the lowest and averaged cleanliness of a part. 100 % cleanliness corresponds to an absolutely clean surface with regard to the used reference surface for calibration.

The device operator can store limit values for a sufficient cleanliness in the device. This function and the set up of parameter can be done in the administration mode of the measuring device.

Calibration of measuring device

The operator selects a new surface profile for a part or part group to be inspected. The calibration of the SITA CleanoSpector is carried out on an absolutely clean reference surface. The reference surface has be prepared and intensively cleaned in the laboratory. Here you can find further information. [..]

Measuring the layer thickness:

The optional windows software SITA CleanoLog allows storing a reference curve for measuring the layer thickness of oils, waxes, corrosion protection agent and bonding agents. Thus, an easy and quick layer thickness measurement is possible. The device operator is allowed to pre-determine limit values for an acceptable coating thickness. The device sends out a signal if limit values are exceeded.

- High product quality through to controlled cleaning
- Easy evaluation of the cleaning results by comparing the cleanliness of parts’ surfaces with a reference surface
- Detection of contamination on parts with diverse shapes and surfaces
- Output of the cleanliness results in percent (%)
- Easy and automatic calibration on a clean surface of a reference surface
- Variable parameter settings e. g. quantity of measuring points for an optimal adoption on the inspection task
- Up to 255 parts’ profiles available

Measuring principle

The SITA CleanoSpector detects contamination due to their fluorescence which is excited by a light emitting diode (LED) with light in an ultraviolet range. The fluorescence intensity depends on the amount of contamination at the measuring point. A photodiode in the sensor head of the SITA CleanoSpector measures the intensity of the fluorescence.

The SITA CleanoSpector is based on the confocal measuring principle. This measuring principle guarantees a high sensitivity towards slight traces of contamination comparable with huge laboratory systems. The sensor head can be easily positioned. With non-contact measurement, ambient light is automatically detected and compensated.

Here you can find further information [..]


The main application field of the SITA CleanoSpector is controlling the cleanliness of parts. The objective is to ensure a high cleaning quality. Subsequent manufacturing processes such as coating, bonding, welding and mounting require sufficient parts cleanliness in order to obtain a high product quality.

The picture show an evaluation model as it can be used for the cleanliness control. Contamination-free parts have a cleanliness of 100 % and correspond to the clean surface of the reference part used for calibration. The limit values for a sufficient cleanliness are determined by clean and poorly cleaned parts out off the manufacturing process. Heavy contaminated parts refer to a cleanliness value of 0 %.

Application examples SITA CleanoSpector for cleanliness inspection:

- Shafts of automobile piston after cleaning - slightest residual contamination of oils, greases or surfactants decrease the adhesive strength before printing the protection layer
- Pistons for hydraulic pumps before hardening - residual contamination have an influence on the steel quality in the hardening furnace
- Stainless steel pipes before coating (vehicle construction)
- Gear case parts before coating or bonding
- Fluxing agent residues on bond pads made of gold on ceramic substrates
- Medical instruments and implants before delivering to the user
- Cleanliness of parts before vacuum or powder coating

Another application is controlling the layer thickness of anticorrosive agents, oils, waxes or bonding agents.

For your security

Our application engineers advise you, if you can use the SITA CleanoSpector for application and how to. We measure your samples and develop an appropriate controlling procedure together with you.

Result: The SITA CleanoSpector optimally supports you for your application.

Here you can find further application examples [..]

    Technical data

    Cleanliness / Fluorescence Intensity
    Measuring range (0...100) % / (0...2,000) RFU*
    Max. measuring deviation 0.5 % of measuring range
    Current Supply
    Mains adapter 5 V/500 mA (USB)
    Battery (Lion, integrated) 3.6 V/1,950 mAh
    Max. power consumption 2.5 W
    Excitation diode 365 nm, max. 150 mW
    Interface, Display, Memory
    USB interface Data transfer, power supply & charging of battery
    Display LCD, 128 x 64 Pixel,

    permanent: measuring parameter / data
    255 profiles, 8191 readings per profile

    Ambient conditions
    Acceptable ambient temperature (storage / operation) (-20...60) °C / (10...40) °C
    acceptable ambient conditions rel. humidity < 70 %,
    air pressure (300...1,060) hPa
    Housing, Dimensios, Weight
    Housing Aluminium, IP 51
    Dimensions (WxHxD)
    Basic Unit
    Sensor head

    129x82x48 in mm
    100x50x30 in mm
    Weight of instrument 530 g

    * RFU - Relative Fluorescence Unit of SITA-Fluorescence standard


    The Windows-Software SITA-ProcessLog allows an easy control of all functions of the SITA CleanoSpector with the PC as well as a comfortable management of the saved measuring data.


    Management and graphical analysis of saved measuring data
    Documentation and evaluation of the process and products‘ characteristics
    Simple and easy preparation of measuring reports
    Controlling the measurement via PC in the laboratory
    Simple generation of concentration curves based on defined samples

    Your Notepad

    • Defining and monitoring quality-relevant variables - Process-oriented approach to assuring cleanliness of partsdelete

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    Literature recommendation

    • Optimized Fluorescence Measuring Technology - Cleanliness inspection directly at the processAdd to my notepad

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    A business unit of SITA Messtechnik GmbH.