Coating Thickness Gauge for Factory QC Incoming, In-Process & Final Inspection Malaysia

For a manufacturing company, coating inspection should not begin only when a customer complains about the finished product. A coating thickness gauge can be incorporated into different stages of factory quality control, including incoming inspection, production checks and final inspection. For Malaysian manufacturers working with painted, powder-coated, galvanized, steel or aluminium components, portable Fe/NFe instruments such as the TASI TA521A and TA522A Coating Thickness Gauges provide a practical non-destructive method of checking suitable coating thicknesses. The TASI TA522A offers a general measuring range of 02000 μm, Fe/NFe measurement capability, automatic substrate recognition and manual measurement mode selection, making it particularly relevant for repetitive factory QC applications. Why Should a Factory Measure Coating Thickness? A coating can affect: Corrosion protection Appearance Surface durability Weather resistance Product quality Customer acceptance Manufacturing consistency Visual inspection can identify obvious problems such as poor colour, surface defects or incomplete coverage. But visual inspection cannot accurately tell you the coating thickness. A component may look acceptable while its coating thickness differs from the required specification. This is where actual measurement becomes useful. Three Stages of Factory Coating Inspection A coating thickness gauge can potentially be used at three important QC stages: Incoming Inspection → In-Process Inspection → Final Inspection Each stage serves a different purpose. 1. Incoming Inspection Factories often purchase coated components from external suppliers. Examples can include: Powder-coated steel parts Painted fabricated components Galvanized steel Coated aluminium components Finished metal enclosures Outsourced surface finishing When these parts arrive, QC personnel can perform incoming inspection before accepting the batch. A basic process can be: Supplier Delivery ↓ Incoming QC ↓ Coating Thickness Measurement ↓ Compare With Purchase Specification ↓ Accept / Investigate This gives the factory objective information about the supplied coating. Why Incoming Coating Inspection Matters If a coating problem is discovered only after assembly, additional costs may already have been incurred. Potential consequences include: Production delays Rework Disassembly Supplier disputes Rejection Customer delivery delays Checking selected components before they enter production can help identify potential issues earlier. 2. In-Process Inspection For factories performing painting or powder coating internally, coating thickness measurement can become part of production process control. Instead of waiting until the entire batch is completed, QC personnel canperiodically check finished components during production. A simplified workflow can be: Coating Process → Sample Measurement → Review Result → Continue / Adjust Process This provides faster feedback to production. If measurements begin to move outside the expected range, the team can investigate the process before completing a large quantity of products. Using Thickness Data for Process Control Suppose a powder coating line produces the same steel cabinet every day. QC can define consistent measurement locations, for example: Front panel Side panel Top Rear panel Selected edge area By checking the same locations on selected units, the factory can build a more consistent QC routine. Over time, the readings may help identify process variation. This is more useful than measuring random locations only when a problem occurs. 3. Final Inspection Before finished products leave the factory, coating thickness can also be included in final QC. A typical final inspection may already include: Dimensions Appearance Assembly Function Labelling Packaging Surface finish Where coating thickness is important, DFT measurement can be added to this checklist. The process becomes: Production Complete → Final QC → DFT Check → Release for Delivery For customer-specific products, results can be compared against the applicable customer specification. TASI TA522A for Factory QC The TASI TA522A provides: General measurement range: 02000 μm Stated accuracy: ±(3% + 1 μm) Fe magnetic induction measurement NFe eddy current measurement Automatic substrate recognition Manual measurement mode selection Fe+Zn measurement capability Zero calibration μm / mm / mil selectable units 2 readings per second 180° screen rotation This combination allows one portable instrument to cover many suitable coating inspection applications in a manufacturing environment. Factory QC for Steel Components For suitable coatings over ferrous steel, the TA522A uses the magnetic induction measurement principle. Examples include: Paint → Steel Powder Coating → Steel Protective Coating → Steel Potential products include: Machinery frames Steel cabinets Electrical enclosures Racking Fabricated components Steel furniture Equipment housings Structural components Steel coating measurement is therefore a strong application for manufacturing QC. Factory QC for Aluminium Components For suitable non-conductive coatings over compatible conductive non-ferrous substrates such as aluminium, the instrument uses the eddy current principle. Applications can include: Aluminium panels Equipment enclosures Fabricated aluminium parts Automotive components Architectural products Powder-coated aluminium Factories producing both steel and aluminium products can therefore benefit from a dual Fe/NFe instrument. Factory QC for Galvanized Steel Galvanized steel requires additional consideration because the product includes a zinc layer over steel. The TASI TA521A and TA522A include Fe+Zn measurement capability, with a specified Fe+Zn range of 3500 μm. This can make the series relevant to factories receiving or manufacturing galvanized components. However, always define the actual measurement requirement. For example: Steel → Zinc is different from: Steel → Zinc → Paint If several layers are present, determine which thickness needs to be measured before interpreting the result. Why TA522A's Manual Mode Is Useful in Production Automatic Fe/NFe recognition is useful when a QC department handles many different products. But some factories manufacture the same component repeatedly. For example: Product: Powder-coated steel enclosure Substrate: Steel Production: Hundreds of units The operator already knows the substrate. The TA522A provides manual measurement mode selection, which gives professional users additional control during repetitive measurements. This is one reason we prefer the TA522A over the TA521A for regular factory QC. Should Every Product Be Measured? Not necessarily. The required inspection frequency depends on factors such as: Product specification Production volume Customer requirements Internal QC procedure Process stability Applicable standards Risk level Some factories may use sampling plans. Others may require more frequent checks. The coating thickness gauge provides the measurement capability, while the company's QC system determines when and how often measurements should be taken. Why Measurement Locations Should Be Standardized If operators measure random locations every time, comparing results becomes more difficult. For repetitive products, consider defining standard measurement points. For example: Point A Front Point B Left side Point C Right side Point D Top Point E Rear This makes readings more comparable between: Different batches Different shifts Different operators Different suppliers A simple handheld gauge can therefore become part of a structured QC process. Recording Coating Thickness Results Depending on the company's requirements, recorded information may include: Product model Batch number Supplier Component identification Measurement location Coating thickness Date Operator Instrument identification Acceptance criteria Pass/fail status Remarks This can help with traceability if a coating issue appears later. Supplier Quality Control A coating thickness gauge can also strengthen discussions with suppliers. Instead of reporting: “Your coating looks too thin.” QC can report: Component → Measurement location → Recorded thickness → Required specification Objective measurement data can make supplier corrective-action discussions more effective. It can also help determine whether a problem is isolated or consistent across a batch. TA521A vs TA522A for Factory QC Both models provide: 02000 μm general measuring range ±(3% + 1 μm) stated accuracy Fe measurement NFe measurement Automatic substrate recognition Fe+Zn capability Zero calibration For smaller companies requiring straightforward general measurements, the TA521A can be considered. For repetitive production inspection and professional QA/QC, we generally recommend the TA522A because of its additional manual measurement mode control. The TA522A is not specified as more accurate than TA521A. The advantage is operating flexibility. Who Should Consider a Coating Thickness Gauge? Potential factory users include: QA departments QC departments Production supervisors Incoming QC Supplier quality teams Engineering departments Maintenance departments Powder coating lines Metal finishing companies Fabrication factories Machinery manufacturers Electrical equipment manufacturers Automotive component manufacturers Common Factory QC Mistakes Checking Only After a Customer Complaint Coating measurement is more useful when incorporated into routine QC. Measuring Random Locations Every Time Standard measurement points improve comparability. Ignoring Supplier Coating Quality Incoming inspection can identify problems before components enter production. Looking Only at One Reading Multiple measurements usually provide better information about coating consistency. Not Recording Results Without records, identifying trends or recurring supplier issues becomes more difficult. Assuming the Gauge Defines Acceptance The instrument measures thickness. The applicablespecification determines whether the reading is acceptable. FAQ Can a coating thickness gauge be used for incoming QC? Yes. Factories can use suitable coating thickness gauges to check coated components received from suppliers. Can it be used during production? Yes. Periodic measurements can provide feedback about coating process consistency. Can it be used for final inspection? Yes. DFT measurement can be included in final QC when coating thickness is part of the product requirement. Can TASI TA522A measure powder coating on steel? Yes, for suitable powder coatings over compatible ferrous substrates within the instrument's specifications. Can TA522A measure coatings on aluminium? Yes, for suitable coatings over compatible conductive non-ferrous substrates using eddy current measurement. Can it measure galvanized steel? The TA522A includes Fe+Zn measurement capability. For multilayer galvanized and painted products, confirm exactly which thickness needs to be measured. Which TASI model is better for regular factory QC? For repetitive professional measurement, we generally recommend the TA522A because of its additional manual measurement mode control. Looking for a Coating Thickness Gauge for Factory QC in Malaysia? If your factory handles painted, powder-coated or galvanized metal products, tell MTM Precision: What product are you inspecting? What is the substrate? What coating is applied? What thickness range do you expect? Is it incoming, production or final QC? We can help you evaluate a suitable coating thickness gauge for your manufacturing process. The TASI TA521A and TA522A are available for consideration for general industrial Fe/NFe coating measurement applications. Contact MTM Precision MTM Precision Sdn Bhd No. 29-1 & 29-2, Jalan Bandar 18 Pusat Bandar Puchong 47160 Puchong, Selangor, Malaysia Website: www.mtmpre.com.my WhatsApp: +6016-660 7346 Email: mtmpre@yahoo.com