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Model: 649A03

$825.00 USD
(Pricing valid in US only)


Bearing Fault Detector PLUS Transmitter (BFD+), Loop Powered 4-20 mA Output with USB Programming Interface

Provides early warning of Rolling Element Bearing (REB) faults, works on constant & variable speed drives, normalizes output using compensated peak value

  • Output: 4-20 mA
  • Excitation Voltage: 15 to 30 VDC

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Output (Loop power)4-20 mA4-20 mA 
Sampling Time1 sec1 sec 
Measurement Range (HPF 250 Hz)0-2 to 0-50 g pk0-2 to 0-50 g pk[1][2] 
Measurement Range (HPF 2500 Hz)0-2 to 0-50 RMS0-2 to 0-50 RMS[1][2] 
Compensated Peak (HPF 250 Hz)1 to 16 1 to 16  
Crest Factor (HPF 250 Hz)1 to 16 1 to 16 [2] 
Crest Factor Plus (HPF 250 Hz)1 to 16 1 to 16 [2] 
Bearing Diameter1.57 to 19.69 in40 to 500 mm 
Bearing Rotation Speed600 to 4800 RPM10 to 80 Hz 
Linearity (Loop powered)10 %10 % 
Temperature Range-40 to 212 °F-40 to 100 °C 
Storage Temperature Range-40 to 257 °F-40 to 125 °C 
Excitation Voltage15 to 30 VDC15 to 30 VDC 
Load Resistance50(Vs-15) Ohm50(Vs-15) Ohm 
Electrical Isolation>10^8 Ohm>10^8 Ohm 
Size - Height2.60 in66 mm 
Size - Hex1.25 in32 mm 
Weight5.7 oz162 gm[3] 
Mounting Thread1/4 - 28 UNF1/4 - 28 UNF 
Mounting Torque3 to 5 ft-lb4 to 7 Nm 
Sensing ElementPiezoelectric AccelerometerPiezoelectric Accelerometer 
Housing MaterialStainless SteelStainless Steel 
SealingWelded HermeticWelded Hermetic 
Electrical Connector2-Pin MIL-C-50152-Pin MIL-C-5015 
Electrical Connection PositionTopTop 
Electrical Connections (Pin A)4-20 mA Pos (+)4-20 mA Pos (+) 
Electrical Connections (Pin B)4-20 mA Neg (-)4-20 mA Neg (-) 
Overload Limit (Shock)5000 g pk49050 m/s² pk 

All specifications are at room temperature unless otherwise specified.


Product Notes
[1] With 0.1g Step
[2] Customer programmable parameters
[3] Typical.
[4] See PCB Declaration of Conformance PS124 for details.
081A41Mounting stud 1/4-28 socket head set screw brass tip stainless steel 5/8" long(1)
Optional Versions:
(M) Metric Mount
    M081A61Mounting Stud(1)
Product Documents
Additional Downloads
- NEW Programming Software for Use with 070A103 Dongle (EE225)
 For use with 070A103 dongle to program 649-Series devices. For users that are still using the old 070A82 dongle and software, please contact the factory for a no charge upgrade.