1.25 x 7 for sale, brand-new and used.

TED (The Energy Detective) 5000 Series Electricity Monitor allows you to view real-time electricity usage on both your computer and a handheld wireless display. Now you can perform your own household energy audits. The TED 5000 package includes one set of clamps with a measuring unit (MTU/CT set), one Gateway embedded with software, and one sleek display.

I googled the patent number and found the following info. The figures on the patent sketches looks slightly different than the piece. Patent number: US 3497806

45-55 Hz 220V Analog Panel Frequency Meter Hertz Indicator for System Monitoring

Digital DC Temperature Meter for K Type EGT Probe with Blue LED (12V / F)

The following description was found from internet sources believed to be reliable, however, seller makes no guaranty to its accuracy.

Features Size: 61mm X 31 mm For the LM3886, each channel needs one PCB board and also you may connect more board in parallel for DIY , not including the components DIY: Thie amplifier board can also be

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Mini DDS Function Generator A gentle note from seller: