Hi Mudz,

I do not believe that a Clamp Wattmeter is available. One needs potential and current to derive wattage. While the clamp meter will give you current if calibrated for a particular system it can't determine voltage. You could of course measure the voltage and do your own calulations. Here is a used wattmeter that was listed on e-bay. As you can see the power source and the load are routed through the meter.

http://www.ebay.com/itm/Extech-Instruments-DW-6060-Watt-Meter-Tested-/162263612146?hash=item25c7aa3af2:g:gx8AAOSw5cNYGKXv

John

There are many "Clamp on Watt meters" but as John has already stated, clamping alone is not enough

The clamp will measure the current, then probes (Same as standard DMM) will be used to measure the voltage, the meter will then do the math for you to show the power.

for instance here is a fluke that can do the job (And alot more) Wattage Meter | Electric Power Meters | Fluke 345 Power Quality Clamp Meter

Dear Mudz

I think you need a specialty meter we use in HVAC field which to some extent will satisfy all your requirements and still being a clamp meter it has all bells and whistle you need. Its called

Amprobe  ACD-45PQACD-45PQ 600A Power Quality Clamp Meter with True-RMS and can be purchased through Amazon as well Here is the link https://www.amazon.com/Amprobe-ACD-45PQ-Power-Quality-True-RMS/dp/B005409S4K  and it costs around 181..$ which may fit your budget !

• Digital clamp meter measures alternating current (AC) to 600 amp, direct current (DC) voltage and AC voltage to 600 volts (V), resistance to 1,000 ohms, and frequency to 500 hertz (Hz)
• True RMS (root mean square) sensing meter provides accurate readings when measuring linear or non-linear loads, where the current or voltage has a sinusoidal or nonsinusoidal waveform
• Transformer clamp with 1" (26 mm) jaw opening measures current without touching or interrupting the circuit
• Measures real power, reactive power, apparent power, power factor, and kilowatt hour (kWHr) usage of single- or three-phase balanced or unbalanced power sources <--------
• Meets International Electrotechnical Commission (IEC) safety standard 61010 and is certified for category III installations up to 600V
• Measurements: AC/DC Voltage up to 600V, AC current up to 600A, resistance, frequency power
• 3 phase unbalanced load measurement - calculation of the discrete single phase measurements

• Auto VA - auto selection of AC volts, DC volts or AC amps
• Ultra slim jaws accommodate conductors up to 1.02 (26mm) in diameter
• Optional PC interface capability (RS-232 KIT2)