What is the difference between Huayang's HCC-25, HCC-24, HCC-18 and HCC-18A coating Thickness Gauges? Except for HCC-25 which adopts the principle of eddy current measurement, the other three models are all magnetic induction. HCC-25 and HCC-24 are 1200μm range, the accuracy is ±3%, the other two are 2000μm range, the accuracy is ±5%. For other specifications, please refer to the comparison table organized by NBCHAO for you: 
| HCC-25 | HCC-24 | HCC-18 | HCC-18A | ||
|---|---|---|---|---|---|
| Measuring principle | Eddy current | magnetic induction | magnetic induction | magnetic induction | |
| Measuring range | 0~1200μm | 0~1200μm | 0~2000μm | 0~2000μm | |
| tolerance scope | ±3% | ±3% | ±5% | ±5% | |
| resolution | 1μm | 1μm | |||
| Minimum measuring surface | Φ10mm | Φ10mm 30*30mm | Φ10mm | Φ10mm | |
| minimum curvature | 15mm | ||||
| Thinnest substrate | |||||
| probe | Split N probe | Split F probe | Split F probe | ||
| Statistical function | Measured average value, maximum value, minimum value, standard deviation and measurement times, while indicating the working status of the instrument and the usage of the battery | ||||
| Icon function | none | ||||
| power supply | One 6F22 9V battery | ||||
| fulfill the standard | ISO 2360, GB/T 4957 | ||||
| Metrology certificate | none | ||||
| system language | Chinese | ||||
| display screen | 4-digit LCD display | Pointer | |||
| Data interface | |||||
| supporting software | none | none | none | ||
| Total Weight | about 250g | about 250g | 370g | 370g | |
| Overall size | 160*80*30mm | 160*80*30mm | 172*85*49mm | 172*85*49mm | |
| use environment | Temperature: 0~40℃; Humidity: ≤90%RH | Temperature: 0~40℃ | |||
