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4028 Series
4028 Series, Precision Power Sensors
4028 Series

4028 Series, 2% Accurate, RF Directional Thruline® Precision Power Sensors are a family of high accuracy sensors for use in high power LCD, TFT and Solar processing and other precision high power applications. Intended for use with the industry standard Bird Precision Laboratory Power Meter Model 4421, these products can provide a threefold improvement in long-term unit-to-unit accuracy.

  • Achieve tighter, more consistent RF power measurements for improved yield.
  • ±2% accuracy at specified calibration frequencies and power levels.
  • Direct, plug-in operation with the industry standard Bird Model 4421 RF Power Meter.
  • Multiple sensors provide for measurement of 1 kW to 25 kW over a 250 kHz to 30 MHz frequency range.
Model Freq. Range RF Power Cal. Freq. (Typical)
4028A250K 250-400 kHz 1.0-20 kW 250, 400 kHz
4028A400K 400-550 kHz 1.0-20 kW 400 kHz
4028A2M 1.5-2.5 MHz 1.0-25 kW 1.8, 2.0, 2.17 MHz
4028A3M 2.5-3.5 MHz 1.0-25 kW 2.5, 3.2, 3.5 MHz
4028A4M 3.5-4.5 MHz 1.0-25 kW 3.5, 4.0 MHz
4028A10M 10-15 MHz 1.0-25 kW 10.0, 13.56, 15.0 MHz
4028A25M 25-30 MHz 1.0-25 kW 25.76, 27.12, 28.48 MHz
4028B3M 2.5-4 MHz 1.0-25 kW 2.5, 3.2, 3.5 MHz
4028B10M 10-15 MHz 1.0-25 kW 10.0, 13.56, 15.0 MHz
4028C10M 10-15 MHz 500W - 50kW 10.0, 13.56, 15.0 MHz
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4028 Series, Precision Power Sensors
4028 Series
product specifications:
Item No
4028 Series
Item Name
2% Accurate, Precision Power Sensors
Frequency Range
See Chart
RF Power
See Chart
VSWR
1.05:1 max.
Insertion Loss
0.05 dB max. (with female 7-16 DIN connectors)
Directivity
28 dB (min.)
Connectors
A Series: Customer specified from QC connector, appropriate for frequency and power
B Series: 1 5/8” EIA Flanged
C Series: 3 1/8” EIA Flanged
Impedance Ω
50 (nominal)
Max Allowable Terminating VSWR
2.00:1
Calibration Power Level
1.7 kW, typical
Calibration Technique
Frequency-specified calibration factors stored in nonvolatile memory in each sensor.
Calibration Cycle
1 year
Accuracy
± 2.0% (2 ó)
Accuracy - Outside Cal Power and Frequency
± 3.0% (2 ó)
Accuracy - RFL
= Fwd accuracy + (Fwd Power/ 10^{directivity/10})
Accuracy - VSWR
Calculated from FWD and RFL power (VSWR = [1+Sqrt(Pr/PF)] / [1-Sqrt(Pr/Pf) / [1-Sqrt (Pr/Pf)])
Sampling Rate
2 readings / second (nominal)
Operating Power
Supplied by power meter via sensor cable
Operating Temperature
0 to 50 °C (32 to 122 °F)
Storage Temperature
-20 to +70 °C (-4 to + 158 °F)
Humidity
95% non-condensing
Altitude
10,000 ft. (3,000 m) max.
Repeatability - Multiple Measurements-Single Sensor
±0.3% (95% c.l.) (with female 7-16 DIN connectors)
Dimensions
(L x W x H)
A Series: 4.7” x 3.2” x 3.8” (120 x 82 x 97 mm) -without connectors
B Series: 6.8” x 3.5” x 4.8” (171 x 89 x 121 mm)
C Series: 8.0” x 5.2” x 6.4” (203 x 131 x 162 mm)
Weight
A Series: 1.7 lbs (.8 kg)
B Series: 3.3 lbs (1.5 kg)
C Series: 7.3 lbs (3.3 kg)