Metal Cleanliness Testing – The CleanoSpector

The CleanoSpector is an easy-to-use handheld non-destructive cleanliness inspection instrument used for measuring organic contamination such as oil, grease and cleaning fluid on metal surfaces.  The instrument is widely used in Automotive and Aerospace industries and allows users to evaluate cleanliness directly at the cleaning process station, on the production line, during field work or in the laboratory.

The instrument has been specifically designed for monitoring cleanliness on manufactured metal parts during and after the cleaning process to ensure surfaces are free of contaminants before the next manufacturing process e.g. assembly, sealing, gluing, painting, printing, lacquering, laser welding etc.  The test results are measured in the degree of the cleanliness of  the metal parts in a percentage format or in RFU (relative fluorescence unit).

The measuring principle is simple – the CleanoSpector detects contamination due to its’ fluorescence which is excited by a UV light emitting diode (UV LED).  The fluorescence intensity depends on the amount of contamination found on the surface at the measuring point, i.e. the higher the fluorescence the more contamination found on the surface.

Advantages of Using the Fluorescence Method for Measuring Metal Cleanliness:

  • High product quality through controlled cleaning.
  • Easy evaluation of the cleaning results by comparing the cleanliness of part’s surfaces with a reference surface.
  • Detection of contamination on parts of various geometry.
  • Output of the cleanliness results in percentage (%) or RFU.
  • Easy and automatic calibration on a clean 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.
  • Administrator & Operator Settings available

The CleanoSpector can also be integrated  for automated inline inspection and robot mounted ideal for 3D part inspection.  Please contact our Sales team to discuss these options further.

 Application Examples for Metal Cleanliness Inspection: 
  • Cleanliness inspection of metal parts after machining
  • Inspection of functional surfaces after selective cleaning (laser cleaning, ultra-fine plasma cleaning, CO2 snow blasting, …)
  • Monitoring the cleanliness of metal parts before laser welding
  • Automotive crank shafts, pistons, cam shafts and con-rods after cleaning.
  • Pistons for hydraulic pumps before hardening – residual contamination has an influence on the steel quality in the hardening furnace
  • Stainless steel pipes before coating (vehicle construction)
  • Detecting residual agents and encapsulation material on bond pads before bonding
  • Surface inspection on electrical contacts after stripping of isolation material
  • Gear case parts before coating or bonding
  • Fluxing agent residues on gold bond pads on ceramic substrates
  • Medical device instruments and implants before delivering to the user
  • Cleanliness of parts before vacuum or powder coating
  • Controlling layer thickness of anti-corrosive agents, oils, waxes or bonding agents.
  • Cleanliness inspection of sealing groove in aluminium die cast housings for engine control units (ECU), automated driving control unit, power electronics for e-mobility, & pumps.

If you would like to discuss this product please contact one of our Sales Team and they will be happy to answer any questions you may have.


  • Mobile and robust measuring instrument for flexible use at the process and in the laboratory
  • Intuitive operation: simple & fast measurement
  • Automatic calibration on reference surface

Application Fields:

  • Contact-free cleanliness inspection of part surfaces at push of button
  • Quality assurance of industrial cleaning processes
  • Layer thickness measurement e.g. of corrosion protection


  • Highest product quality by monitoring limit values
  • Documentation of slightest contamination on various shaped surfaces
  • Efficiency by process optimisation.

Packing List:    CleanoSpector measuring instrument, carry case, stand, mains adapter, 2 spacers, USB-cable, calibration standard N0 (no fluorescence), operating instruction, calibration certificate

Cleanliness Power Supply
Measuring Range: 0 – 100% Mains Adapter/USB 100… 240V
Resolution: 0.1% Li-Ion battery 3.6V / 1,950mAh min 8h operating time
Power Consumption: 2.5W max.
Fluorescence intensity  
Measuring Range: 0 – 2,000 RFU (Relative Fluorescence Unit) Interface, Memory, Dimension & Weight
Max. Deviation: 0.5% of measuring range USB-interface: data transfer
Resolution: 0.1 RFU Display: LCD, illuminated
Excitation*: 365nm, max. 150mW Measuring Profiles: 254
Detection*: 460nm Memory: 8,000 measuring values/profile
Measuring Point*: D=1mm Dimensions (L x W x H)
Measuring Distance*: 4.7mm Hand-held Device: 129 x 82 x 48mm
* standard values Sensor Head: 95 x 50 x 30mm
Weight (device): 530g
Layer Thickness
Measuring range User-defined



Order Code Description
G80-000010 CleanoSpector Metal Cleanliness Measuring Instrument



Order Code Description
G02-000005 SITA-ProcessLog Software for Windows 10/11 (USB) licence per device
G01-000049 Calibration standard N1 for verification of CleanoSpector
G01-000048 Calibration standard N0 (no fluorescence) for verification of CleanoSpector
G01-000006 Set of Calibration Standards N0 & N1
G01-000039 Cleaning Kit
F21-000055 Magnetic holder for fine adjustment of CleanoSpector
F10-000439 Magnetic holder with adapter for measurement stands (thread M6/M8)
F10-000438 Shielding for contact-less measurements in high ambient light conditions on flat surfaces
F10-000437 Stainless steel block with V-sections to place parts with different shapes (particularly shafts, wires or similar)
F10-000017 Aluminium Spacer Type 1 – Standard Shape,  for positioning on flat surfaces
F10-000018 Tripod Spacer Type 2 –  for positioning on slightly curved surfaces
F10-000429 Bipod Spacer Type 3 – for perpendicular positioning in notches and grooves
F10-000430 Large Spacer Type 4 – for stable positioning on even surfaces (dia. 24mm)
F10-000431 Pipe Spacer Type 5 – for positioning on pipes with a diameter of 18mm
F10-000432 Pipe Spacer Type 6 – for positioning on pipes with a diameter of 21mm
F10-000433 Cone Spacer Type 7 – for setting the measuring distance
F10-000434 Open Cone Spacer Type 8 – for perpendicular positioning in wide openings or holes and on small parts
F10-000435 Standard Shape Plastic Spacer Type 9 – for positioning on sensitive, flat surfaces
F10-000436 Standard Shape Stainless Steel  Spacer Type 10  – a robust spacer for minimal wear with intensive use and for contact with corrosive media.