DeFelsko PosiTector 200
F.A.Q.
Do your instruments require any formal training for use? Do you offer ‘demo’ models?
No. Our instruments are designed for simple operation, feature easy-to-use menus, both full and quick instruction manuals, and helpful videos. In lieu of demonstration models, we provide unlimited technical support via telephone and/or email, and a limited 30-day money back guarantee.
Is the DeFelsko PosiTector 200 calibrated at the factory?
The DeFelsko PosiTector 200 arrives fully calibrated and ready to measure. A Long-Form Certificate of Calibration traceable to NIST or PTB is included, which documents actual readings taken by your instrument at our calibration laboratory on standards traceable to a national metrology institute. Beware of ‘Certificates’ or ‘Certificates of Conformance’ offered by competitors. These typically do not include actual instrument readings, and are often insufficient to meet common quality requirements
The DeFelsko PosiTector 200 is factory calibrated to measure most polymer coatings out of the box without calibration or adjustment. If required, a simple gage adjustment can be made to a coating sample of known thickness as close as possible in composition to the intended application. For best results, the thickness of the sample should be equal to or slightly greater than the maximum expected thickness of the coating to be measured.
Can the DeFelsko PosiTector 200 be used to measure coatings on metal substrates?
In many cases, yes! However, the following should be noted:
- Metal Substrate Thickness: Because sound travels through metals approximately three times faster than it travels through most protective coatings, substrate thickness will largely determine the suitability of a particular coating thickness application for the DeFelsko PosiTector 200.
- Gage Adjustment: Adjustment to the DeFelsko PosiTector 200 gage’s Hi Range to eliminate unwanted metal substrate back-wall echoes is typically required for improved measurement repeatability. This process of adjustment is simplified through the use of the DeFelsko PosiTector 200 Advanced gage’s Graphics Mode. Although a DeFelsko PosiTector 200 Standard gage model has the capability to accurately measure single coat applications and a total coating system thickness of multi-layer applications, we strongly recommend the use of a DeFelsko PosiTector 200 Advanced gage model for measurement on metal substrates.
- Single Coat Applications: A minimum coating thickness of 13µm (0.5 mil) on a flat metal substrate with a minimum thickness of 1.25mm (50 mils) is usually required.
- Multi-Layer Applications –
- Total thickness: In many circumstances, the total thickness of a multi-layer coating system over metal can be reliably measured. As in single coat applications, a minimum total coating system coating thickness of 13µm (0.5 mil) on a flat metal substrate with a minimum thickness of 1.25mm (50 mils) is usually required.
- Individual layers: The DeFelsko PosiTector 200 will measure the thickness of individual layers when each layer is thicker than 125µm (5 mils) and the metal substrate is thicker than 6mm (0.25”). A greater difference in the acoustic characteristics of each layer results in a greater likelihood of accurate individual layer measurement.
A PosiTector 6000 probe is generally recommended over a DeFelsko PosiTector 200 probe for measuring coating thickness on metal substrates because –
- Lower cost
- Larger selection of probes (none requiring the use of an ultrasonic couplant gel)
- Greater accuracy
- Unlike DeFelsko PosiTector 200 probes, adjustment is not required for most protective coating properties
- Fully conform to international standards for measuring coating thickness over metal
What is couplant?Do I need to use it every time I take a reading?
Couplant is required for every reading in order to propagate ultrasound into the coating. Water is a suitable couplant for smooth coatings. Use the supplied glycol gel for rougher coatings.
Can the DeFelsko PosiTector 200 measure coatings that contain particles or aggregate?
Broadcast epoxy, urethane mortar and other coating systems that contain aggregates or particulate inclusions (silica, quartz flake, concrete, etc.) will present a significant measurement challenge to our ultrasonic DeFelsko PosiTector 200 instrument. This is caused by the tendency of the solid particles to interfere with the ultrasonic impulse and typically results in unreliable thickness readings.
How do I ‘Zero’ the DeFelsko PosiTector 200?
Unlike a magnetic or eddy-current principle gage, an uncoated substrate is not required to Zero the DeFelsko PosiTector 200. Instead, the probe is held in the air away from the substrate when the Zero is performed.
How often should the DeFelsko PosiTector probe be recalibrated?
DeFelsko PosiTector probes include a Certificate of Calibration with no expiry or end date. They have no shelf life, therefore the length of time in the field is not a good indicator for recalibration intervals. Many organizations with quality programs and recertification programs require annual recalibrations, and this is a good starting point for most users. DeFelsko recommends that customers establish calibration intervals based upon their own experience and work environment. Based on our product knowledge, data and customer feedback, a one year calibration interval from the date the instrument was placed in service is a good starting point.
DeFelsko 200B1 Positector 200 B1 Standard Ultrasonic Coating Thickness Gage
- The DeFelsko PosiTector 200B1 non-destructively measures a wide variety of applications using proven ultrasound technology. The PosiTector 200B1 model measures polymer coating on wood, plastic, etc
- Measuring Range: 0.5 - 40 mils (13 - 1000 µm)
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DeFelsko 200C1 Positector 200 C1 Standard Ultrasonic Coating Thickness Gage
- The DeFelsko PosiTector 200C1 non-destructively measures a wide variety of applications using proven ultrasound technology. The PosiTector 200C1 model measures coating thickness on concrete, fiberglass, etc
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Measuring Range: 2 - 150 mils (50 - 3800 µm)
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DeFelsko 200D1 Positector 200 D1 Standard Ultrasonic Coating Thickness Gage
- The DeFelsko PosiTector 200D1 non-destructively measures a wide variety of applications using proven ultrasound technology. The PosiTector 200D1 measures thick, soft coatings like polyurea, asphaltic neoprene, very thick polymers.
Measuring Range: 2 - 300 mils (50 - 7600 µm)
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DeFelsko 200B3 Positector 200 B3 Advanced Ultrasonic Coating Thickness Gage
- The DeFelsko PosiTector 200B3 non-destructively measures a wide variety of applications using proven ultrasound technology. The PosiTector 200B3 model measures polymer coating on wood, plastic, etc. Advanced models of the PosiTector 200 measure up to 3 layers with graphics.
Measuring Range: 0.5 - 40 mils (13 - 1000 µm)
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DeFelsko 200C3 Positector 200 C3 Advanced Ultrasonic Coating Thickness Gage
- The DeFelsko PosiTector 200C1 non-destructively measures a wide variety of applications using proven ultrasound technology. The PosiTector 200C1 model measures coating thickness on concrete, fiberglass, etc. Advanced models measure up to 3 layers with graphics.
Measuring Range: 2 - 150 mils (50 - 3800 µm)
- Separate Probe
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DeFelsko 200D3 Positector 200 D3 Advanced Ultrasonic Coating Thickness Gage
- The DeFelsko PosiTector 200D3 non-destructively measures a wide variety of applications using proven ultrasound technology. The PosiTector 200D3 measures thick, soft coatings like polyurea, asphaltic neoprene, very thick polymers. Advanced models of the PosiTector 200 measure up to 3 layers with graphics.
Measuring Range: 2 - 300 mils (50 - 7600 µm)
- Separate Probe
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DeFelsko PRB200B Positector 200 B Probe Only Ultrasonic Coating Thickness Gage
- The DeFelsko PRB200B Positector 200 B Probe non-destructively measures a wide variety of applications using proven ultrasound technology. The PosiTector PRB200B probe measures polymer coating on wood, plastic, etc.
Measuring Range: 0.5 - 40 mils (13 - 1000 µm)
- Probe Only
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DeFelsko PRB200C Positector 200 C Probe Only Ultrasonic Coating Thickness Gage
- The DeFelsko PosiTector PR200C probe non-destructively measures a wide variety of applications using proven ultrasound technology. The PosiTector PRB200C model measures coating thickness on concrete, fiberglass, etc.
Measuring Range: 2 - 150 mils (50 - 3800 µm)
- Separate Probe
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DeFelsko PRB200D Positector 200 D Probe Only Ultrasonic Coating Thickness Gage
- The DeFelsko PosiTector PRB200D non-destructively measures a wide variety of applications using proven ultrasound technology. The PosiTector PRB200D measures thick, soft coatings like polyurea, asphaltic neoprene, very thick polymers.
Measuring Range: 2 to 300 mils (50 to 7600 um)
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