LS221 Coating Thickness Gauge

Measuring range: 0.0-2000μm
Fast measurement, 0.5s measuring interval
Ferrous/Non ferrous thickness gauge
Seperate thickness meter used in narrow space

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LS221 coating thickness gauge is also called coating thickness meter and paint thickness meter. It is a professional instrument for measuring the thickness of metal surface coatings. The host and the probe adopt a separate design, which is convenient for viewing data while testing under complex test conditions. It can be used in the laboratory and engineering field.

  • There are only four types of ferromagnetic metal elements at room temperature: iron, cobalt, nickel, and gadolinium.

  • Common non-ferromagnetic metals: copper, aluminum, magnesium, zinc, chromium, etc.

  • Hall effect: can be used for the measurement of non-ferromagnetic coatings on ferromagnetic metal substrates.

  • Eddy current: can be used for the measurement of non-conductive coatings on non-magnetic metal substrates.

Substrate Coating Examples Yes/No
Magnetic Ferromagnetic materials:
Iron, cobalt,
nickel, gadolinium
Non-ferromagnetic metal 1. Galvanized iron
2. Iron copper plating
Non-metal materials 1. Iron spray paint
2. Iron spray powder coating
Ferromagnetic material:
Iron, cobalt, nickel and gadolinium
Iron nickel plating ×
Eddy current Non-ferromagnetic metal:
Copper, aluminum,
magnesium,zinc, etc.
Non-conductive material 1. Anodized aluminum surface
2. Copper spray paint


LS221 coating thickness gauge is widely used in metal processing industry, coating industry, hardware industry, shipbuilding industry, aerospace industry and other fields. The following pictures are a few examples of the practical application of the LS221 digital paint thickness gauge. (the following measurements are for reference only, not all)

LS221 digital paint thickness gauge test different materials
LS221 digital paint thickness gauge test different materials


Parameter LS221 Coating Thickness Gauge
Probe tip Ruby fixed
Measuring principle Fe:Hall Effect / NFe: Eddy current
Probe type External cable probe
Measuring rang 0.0-2000μm
Resolution 0.1μm:(0μm -99.9μm)
Accuracy ≤±(3% reading+2μm)
Unit μm / mil
Measuring interval 0.5s
Minimum measuring area Ø = 25mm
Minimum curvature Convex:5mm / Concave:25mm
Minimum substrate thickness Fe:0.2mm / NFe:0.05mm
Display 128×48 dot matrix LCD
Power supply 2pcs of 1.5V AAA alkaline battery
Range of operation temperature 0℃-50℃
Storage temperature range -20℃-60℃
Host size 101*62*28 mm
Probe size 71*26*22 mm
Weight (with battery) 114 g
LS221 paint thickness gauge
LS221 paint thickness gauge

LS221 Coating Thickness Gauge Characteristics

1. The LS221 coating thickness gauge adopt two measurement principles and can identify the substrate automatically. Measurement can be completed in 0.5 seconds.

Two measurement modes of LS221 paint thickness gauge
Two measurement modes of LS221 paint thickness gauge

2. Advanced digital probe technology can keep the zero position stable without drift and frequent zero adjustment.

3. Small size for carrying around.

4. Advanced technology solves the linearity problem of the LS221 coating thickness gauge. No calibration is required just simple zero adjustment to ensure the measurement accuracy.

LS221 coating thickness gauge accuracy test

5. The LS221 digital paint thickness gauge has high sensitivity probe, the test response speed is very high and the data can be measured in 0.5 seconds.

6. With temperature compensation function and digitalizing analog signal function, these sensors are unsusceptible to interference.

7. Wear-proof ruby probe tip for long-term use with strong corrosion and abrasion resistance.

8. The LS221 coating thickness gauge has negative number display function to ensure the accuracy of the zero adjustment and improve the test accuracy.

9. Low power design, the current is less than 0.01uA in standby.

10. The LS221 coating thickness gauge has three measurement modes:Fe mode, NFe mode and Fe/NFe mode. 

Three measurement modes and language switch
Three measurement modes and language switch

Qualification and Standards

1. LS221 coating thickness gauge conforms to the following standards:

  • GB/T 4956-2003 Non-magnetic Coatings on Magnetic Substrates-Measurement of Coating Thickness-Magnetic Method

  • GB/T 4957-2003 Non-conductive Coatings on Non-magnetic Basis Metals-Measurement of Coating Thickness-Eddy Current

  • DIN EN ISO 2808 Paints and Varnishes-Determination of Film Thickness

  • JJG-818-2005 Verification Regulation of Magnetic and Eddy Current Measuring Instrument for Coating Thickness 

Operation Video

Packaging Details

No. Item Quantity Unit
1 LS221 coating thickness gauge 1 Set
2 Fe plate of zero adjustment 1 Pcs
3 NFe plate of zero adjustment 1 Pcs
4 User manual 1 Pcs
5 Standard film 1 Pcs
6 Certificate/Warranty card 1 Pcs
7 1.5V AAA alkaline battery 2 Pcs

After-sales Service

  1. The meter has one-year warranty. If the gauge works abnormally, please send the whole gauge to our company for maintenance

  2. Provide users with spare parts and lifelong maintenance services

  3. Provide the users with the meter inspection service

  4. Free technical support for long term

Manufacturer: Shenzhen Linshang Technology Co.,Ltd. Website:

Service hotline: 0755-86263411 Email:


  1. 1. The difference between LS220H and LS221

    The functions and parameters of LS220H and LS221 are exactly the same, but the LS220H coating thickness gauge adopts an integrated design and can be operated with one hand; while the LS221 adopts a split design, the probe size is smaller, which is suitable for measuring narrow spaces and some special positions.

    If you want to know more about the Linshang coating thickness gauge, Please click Coating Thickness Gauge Selection and FAQ”.

Recommended Products

● No calibration, one button, easy to carry and operate
● Measure coating thickness on ferromagnetic and non-ferromagnetic metal substrates
● Measurement range: 0.0-2000μm
● Accuracy: ≤±(3% reading+2μm)
● Suitable for measuring thick anticorrosive, fireproof coating, etc
● Measure coating thickness on ferromagnetic and non-ferromagnetic metal substrates
● Fe:0.0-5000μm NFe:0.0-3000μm
● Accuracy: ≤±(3% reading+2μm)
● Suitable for ultra-thin coating and small workpiece
● Measure plating thickness on ferromagnetic metal substrates
● Measurement range: 0-500μm
● Accuracy: ≤±(2%+0.3μm) after calibration of 1-5 points
● Test fixture is optional to eliminate the measurement errors