complies with ansi, csa, ul, iec, en, ce, and vde requirements. each of these devices is high-precision manufactured. unit comes with iso 17025 compliant nist-traceable certificate of calibration.
rheostats are adjustable power resistors. perfect for low voltage applications (i.e. 5v, 12v, 24v). the low cost option for loading. another benefit is that they can be adjusted under load.
for checking the protection against water to prove the degrees of protection with the second number x1. "protection against vertical dripping of water" and x2.