Bird - The RF Experts
4410A and 4412A Multipower RF Wattmeters

Multipower RF Wattmeter with ±5% Reading Accuracy

The Model 4412A RF Wattmeter uses the basic principles and “look and feel” of the Model 43 but transforms it into a highly accurate high dynamic range instrument. The meter has two scales, a 0 to 1 scale and a 0 to 3 scale.

Power is read as a multiple of the value indicated by the pointer, the decimal point location depending upon the range switch position and the factor printed on the plug-in element. Power ranges covered by individual elements are 300 mW to 1 KW and 2 W to 10 KW, full scale. For most elements, accuracy is +/-5% anywhere above 20% of full scale. The circuitry operates from a rechargeable battery.

  • Temperature-compensated accurate CW and FM power measurements from 200 kHz to 1 GHz and 300 mW to 10 KW
  • Uses special 4410-series wide-range elements
  • Wide-range accuracy over a 37 dB dynamic range
  • Quick Change (QC) connectors to minimize the need for adapters when making critical measurements
4410A and 4412A Multipower RF Wattmeters
product specifications:
Item No
Item Name
Multipower Wattmeter
Power Range
300 mW to 1 kW or 2 W to 10 kW full scale in one single Plug-in Element
Frequency Range
200 kHz to 1 GHz CW or FM
Insertion VSWR
with N Connectors 1.25 max. to 2300 MHz
±5% of reading for any reading above 20% of the Power Range selected for FM or CW signals without AM. This accuracy is maintained for a full 37 dB dynamic range with each 4410 Element (except No. 4410-1, 200 kHz to 535 kHz, which is accurate to ±10% of reading, and 4410-15, 1.0 to 1.8 GHz and 4410-16, 1.8 to 2.3 GHz, which are accurate to ±8% of reading.)
Usuable Over Range
To 120% of nominal full scale
(i.e. 12 W, 120 W, 1200 W, or 12,000 W). No damage or degradation to the unit will result, regardless of the Range Selector Switch position
QC Type (Female N normally supplied)
9V Rechargeable Battery
Operating Temperature
Ambient Temp Range
Elements 4410-1 through -8 and -10 through -16 are temperature compensated for rated accuracy from 0°C to 50°C (32°F to 122°F) and 4410-20 through -27 from 20°C to 30°C (68°F to 86°F)
Light Gray Powder Coat
(H x W x D)
6.88 in x 5.13 in x 3.63 in
175 mm x 130 mm x 92 mm
3.33 lbs. (1.5 kg)
compatible devices:
4410 Elements
4410 Series, Elements
Carrying Case - 4410A Portable Wattmeter, 100-ST Load, 4 Elements and Accessories
Carrying Case - 12 Plug-In Elements
9V, MiMH Rechargable Battery