Is the SL-030B digital surface resistance tester an upgraded version?
The SL-030B digital surface resistance tester is available in two versions: the upgraded version and the old version. The main differences lie in the display and expanded functions:
1. Upgraded Version (Digital + LED Dual Display)
Functions: Directly reads resistance values using a digital display (LCD/LED). Some models include integrated temperature and humidity monitoring. The test range covers 10³-10¹² ohms and supports automatic 10V/100V voltage switching.
2. Old Version (LED Flashing Only)
Features: Flashing LED indicates resistance range, no digital display, and a lower price.
Key Differences Between the New and Old Versions of the SL-030B Weight-Type Surface Resistance Tester
Accuracy: The upgraded version features a higher digital display accuracy (±0.5%-5%), while the old version relies on visual inspection.
Expanded Functions: Some upgraded models support ambient temperature and humidity monitoring, complying with ASTM D-257. If high-precision measurements are required, it is recommended to choose an upgraded model clearly marked with "digital display" or "dual display".