industrial vibration sensor, 4 to 20 ma output, 0 to 1 in/sec rms, 10 to 1k hz, top exit, 10-ft integral armor cable

4-20 mA Output Velocity Sensor

Model 641B61

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Industrial vibration sensor, 4 to 20 mA output, 0 to 1 in/sec RMS, 10 to 1k Hz, top exit, 10-ft integral armor cable

  • Measurement Range: 0.0 to 1 in/sec rms (0.0 to 25.4 mm/s rms)
  • Output: 4-20 mA
  • Frequency Range: (±10%)600 to 60000 cpm (10 to 1 kHz)
  • Sensing Element: Ceramic
  • Weight: 4.7 oz (131 gm)

Additional configurations:

Specification Notes

[1] 1Hz = 60 cpm (cycles per minute).
[2] Current will fluctuate at frequencies below 5 Hz.
[3] Conversion Factor 1 in/sec = 0.0254 m/sec.
[4] Typical.
[5] Stainless steel armor jacket over twisted shielded pair.
[6] See PCB Declaration of Conformance PS039 or PS053 for details.

English: SI:
Performance
Measurement Range 0.0 to 1 in/sec rms 0.0 to 25.4 mm/s rms [3]
Output 4-20 mA 4-20 mA
Frequency Range (±10 %) 600 to 60000 cpm 10 to 1 kHz [1] [2]
Broadband Resolution 0.005 in/sec pk 0.13 mm/s pk [4]
Non-Linearity ±1 % ±1 %
Environmental
Temperature Range -40 to 185 °F -40 to 85 °C
Electrical
Excitation Voltage 12 to 30 VDC 12 to 30 VDC
Settling Time (within 2% of value) <15 sec <15 sec
Electrical Isolation (Case) >100000000 >100000000
Physical
Size - Hex 1.0 in 25.4 mm
Size - Height 4.2 in 107 mm
Weight (without cable) 4.7 oz 131 gm
Mounting Thread 1/4-28 UNF No Metric Equivalent
Mounting Torque 3 to 5 ft-lb 4 to 7 Nm
Sensing Element Ceramic Ceramic
Sensing Geometry Shear Shear
Housing Material Stainless Steel Stainless Steel
Sealing Welded Hermetic Welded Hermetic
Electrical Connector Integral Armored Cable Integral Armored Cable
Electrical Connection Position Top Top
Electrical Connections (Red) 4-20 mA Pos (+) 4-20 mA Pos (+)
Electrical Connections (Blue) 4-20 mA Neg (-) 4-20 mA Neg (-)
Cable Length 10 ft 3.0 m
Cable Type Polyurethane Polyurethane [5]

* All specifications are at room temperature unless otherwise specified.

Accessories
Supplied
081A40 Mounting stud, 1/4-28 x 0.438" long stainless steel screw with hex socket and brass tip 1
ICS-4 NIST-traceable single axis amplitude response cal from 0 to +10% freq. (for 4 to 20 mA sensors) 1

Optional Versions

(EX) Hazardous Area Approval- contact factory for specific approvals

English SI
Hazardous Area Approval EEx nL IIC T4, -40 ° C ≤ Ta ≤ 80 ° C, II 3 G
Hazardous Area Approval DIV I, CL I, II, III, GRPS A-G, Exia, AExia, IIC T4
Hazardous Area Approval DIV II, CL I, GRPS A-D, ExnL, AExnA, IIC T4
Hazardous Area Approval EEx ia IIC T4, -40 ° C ≤ Ta ≤ 80 ° C, II 1 G
(M) Metric Mount
Accessories:
Supplied M081A61 Mounting Stud 1

(RV) Buffered Analog Signal Output - 100 mV/g (±20%)

English SI
Electrical Connector Integral Armored Cable
Electrical Connections 4-20 mA Pos (+)
Electrical Connections 4-20 mA Neg (-)
Electrical Connections Signal Output Pos
Electrical Connections Signal Output Neg