Keithley 2182A Digital Nanovoltmeter & Low Voltage MeterMake low noise measurements at high speeds, typically just 15nV p-p noise at 1s response time, 40-50nV p-p noise at 60msDelta mode coordinates measurements with a reversing current source at up to 24Hz with 30nV p-p noise (typical) for one readingSynchronization to line provides 110dB NMRR and minimizes the effect of AC common-mode currents.Dual channels support measuring voltage, temperature, or the ratio of an unknown resistance to a reference resistor.Built-in thermocouple linearization and cold junction compensation.Averages multiple readings for greater noise reduction