"Stay Conductive"...

Conductive = Hard to let the programmable Black Goo to operate/take over.

Non Conductive = Easier to control the programmable Black Goo.

Conductive (Minimum -20 Milli Volt Cell Charge)
= Staying Human

Non Conductive (Under -20 Milli Volt cell Charge)
= Becoming Dalek

So this little gadget/device could from now on be nicknamed the "Dalek'o'Meter"

http://www.tennantbiomodulator.ca/about/biomodulator-technology

Didn't find the exact description, but the device can basically read each of your 7 energy centers/chakra level of Milli Voltage. If it is under -20 it will bio-feedback respond and pulse in some -70 to -50 Volts to achieve a state of healing cell Voltage.