The contact resistance of conductive polymer bumps, 50 [[micro]meter] high on gold, has been measured repeatedly in the 15 to 25 milliohm
Two DC resistance meters accurately measure resistance in the milliohm
Features include: CAL-ALERT[R], Automatic Calibration Alert System; VERI-CHEK[R], Built-in Self Verification System; 10 Memories with 3 Steps per Memory; Enhanced PLC Remote Control; and 4-Wire Measurement and Milliohm
IMHO, with advances in MOSFETS, they have become tiny, low-cost, fast, with high voltage capabilities, and with milliohm
on-resistance, so one has much less need for things like fuses or NTC resistors to protect against over-voltages or surge currents.
The silver inlay contacts have an initial resistance of [less than or equal to] 10 milliohm
at 125 VAC, at 1 A at 2 ~ 4 VDC.
The units include a digital port with external triggering and remote-inhibit functionality, a built in 5 1/2-digit voltmeter, a milliohm
meter supporting four-wire measurements, memory for storing 50 parameters, and fan-speed control to minimize audio noise.
A high-volume manufacturer of batteries for a cell phone company originally used a test system designed with Agilent Technologies' instruments including the 3499A Switch/Control Mainframe, the 34401A DMM, 6652A and 6624A DC Power Supplies, a 6060B Electronic Load, and a 4338B Milliohm
Hoyt Electrical Instrument Works has announced its SEW Digital Milliohm
Testers, 4136m[ohm] and 4137m[ohm].
* 4-wire milliohm
meter--providing a Kelvin connection for highly accurate low resistance measurements.