Purchase the Mastech / Sinometer MS8218 here:
http://astore.amazon.com/m0711-20/det…

Product Description

The newly released MS8218 is an auto-range 50,000 count true RMS digital multimeter with high accuracy and resolution. With its 24-bit A/D converter and single-chip micro-processer, it can measure AC/DC current and voltage up to 1000 volts and 10 amps and give you true RMS readings even if it’s a mixed AC/DC signal. You can also use it to measure large resistor (upto 50MOhms) and capacitors (upto 5 mF). This meter comes with a RS232C port and compatible software, so you can easily hook it up with a computer to display, record and plot your measurement on your computer. Its graphic software has a unique dynamic scale so even a tiny variation will be reflected on the computer.

AC/DC V/A + Resistance + Capacitance + Frequency (linear & logic)
True RMA reading on AC & AC+DC
All-range fuse protected
Software & necessary accessories are include

Specifications:

Ranging automatic/manual
Counts 50000
DC voltage 50/500mV/5/50/500/1000V ±0.03%
DC + AC voltage 50/500mV/5/50/500/100V ±0.5%
DC current 500/5000µA/50/500mA/5/10A ±0.15%
AC current 500/5000µA/50/500mA/5A ±0.75%, 10A ±1.5%
Resistance 500Ω/5/50/500kΩ/5MΩ ±0.1%, 50MΩ ±0.5%
Capacitance 50/500nF/5/50µF ±1%, 500/5000µF ±2%
Inductancy 2 mH / 20 mH / 200 mH / 2 H 20 H ± 3.0%
Conductivity wire identification yes
Diode, transistor test yes
Automatic power-off yes
Data Hold yes
Overload protection yes
Charge battery indication yes
Measurement mode of relative quantity yes
Off-duty factor 5Hz – 500kHz
max/min value measurement yes
rms value yes
Power source 6 1.5V (AAA)
Dimensions, mm 200 × 100 × 40 mm
PC interface connection yes