4028 Series, Precision Power Sensors
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4028 Series, Precision Power Sensors
Bird Technologies - The RF Experts

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 kHz
4028A3M
2.5-3.5 MHz
1.0-25 kW
2.5, 3.2, 3.5 kHz
4028A4M
3.5-4.5 MHz
1.0-25 kW
3.5, 4.0 kHz
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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product specifications:

Item No4028 Series
Item Name2% Accurate, Precision Power Sensors
Frequency RangeSee Chart
RF PowerSee Chart
VSWR1.05:1 max.
Insertion Loss0.05 dB max. (with female 7-16 DIN connectors)
Directivity28 dB (min.)
ConnectorsA 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 Ω50 (nominal)
Max Allowable Terminating VSWR2.00:1
Calibration Power Level3.5 kW, typical
Calibration TechniqueFrequency-specified calibration factors stored in nonvolatile memory in each sensor.
Calibration Cycle1 year (nominal)
Accuracy± 2.0% (2 ó)
Accuracy - Outside Cal Power and Frequency± 4.0% (2 ó)
Accuracy - RFL= Fwd accuracy + (Fwd Power/ 10^{directivity/10})
Accuracy - VSWRCalculated from FWD and RFL power (VSWR = [1+Sqrt(Pr/PF)] / [1-Sqrt(Pr/Pf) / [1-Sqrt (Pr/Pf)])
Sampling Rate2 readings / second (nominal)
Operating PowerSupplied by power meter via sensor cable
Operating Temperature0 to 50 °C (32 to 122 °F) (derate accuracy outside 25 ± 10 °C)
Storage Temperature-20 to +70 °C (-4 to + 158 °F)
Humidity95% non-condensing
Altitude10,000 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)
WeightA Series: 1.7 lbs (.8 kg)
B Series: 3.3 lbs (1.5 kg)
C Series: 7.3 lbs (3.3 kg)

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