Model 635A11 Product Type: Accelerometer, Vibration Sensor High frequency ring, industrial, ceramic shear ICP® accel, 100 mV/g, 0.4 to 18k Hz, 1/4-28 thru bolt, 10-ft integral cable

PERFORMANCE ENGLISH SI Sensitivity 100 mV/g 10.2 mV/(m/s²) [2] Measurement Range ± 50 g ± 490 m/s² Frequency Range  (± 10 %) 68 to 720,000 cpm 1.13 to 12,000 Hz [3] Frequency Range  (± 3 dB) 32 to 900,000 cpm 0.53 to 15,000 Hz Resonant Frequency 1800 kcpm 30 kHz [1] Broadband Resolution  (1 to 10,000 Hz) 240 µg 2354 µm/s² [1] Non-Linearity ± 1 % ± 1 % [4] Transverse Sensitivity ≤ 5 % ≤ 5 % ENVIRONMENTAL     Overload Limit  (Shock) 5000 g pk 49,050 m/s² pk Temperature Range -65 to +250 °F -54 to +121 °C ELECTRICAL     Settling Time  (within 1% of bias) ≤ 2 sec ≤ 2 sec Discharge Time Constant ≥ 0.3 sec ≥ 0.3 sec Excitation Voltage 18 to 28 VDC 18 to 28 VDC Constant Current Excitation 2 to 20 mA 2 to 20 mA Output Impedance <150 ohm <150 ohm Output Bias Voltage 8 to 12 VDC 8 to 12 VDC Spectral Noise  (10 Hz) 8 µg/√Hz 78.5 (µm/s²)/√Hz [1] Spectral Noise  (100 Hz) 2 µg/√Hz 19.6 (µm/s²)/√Hz [1] Spectral Noise  (1 kHz) 1 µg/√Hz 9.81 (µm/s²)/√Hz [1] Electrical Isolation >108 ohm >108 ohm PHYSICAL     Size (Diameter x Height) 1.13 in x .82 in 28.7 mm x 20.8 mm Weight 3 oz 86 gm Mounting Stud Stud Mounting Thread 1/4-28 Male Not Applicable [5] Mounting Torque 2 to 5 ft-lb 2.7 to 6.8 N-m Sensing Element Ceramic Ceramic Sensing Geometry Shear Shear Housing Material Stainless Steel Stainless Steel Sealing Welded Hermetic Welded Hermetic Electrical Connector Molded Integral Cable Molded Integral Cable [6] Electrical Connection Position Side Side Electrical Connections  (Red) Acceleration Output Acceleration Output Electrical Connections  (Blue) Ground Ground Cable Length 10 ft 3 m Cable Type Polyurethane Polyurethane SUPPLIED ACCESSORIES: Model 081A97 Captive mounting bolt, 1/4-28 x 1.00" long, hex head (1) Model 081A97 Thru bolt 1/4-28 (1) Model ICS-8 NIST-traceable single-axis amplitude response calibration from 600 cpm (10Hz) to upper 10% frequency. (1) OPTIONAL VERSIONS M - Metric Mount Supplied Accessory : Model M081A97 Captive mounting bolt, M6 x 1 x 25.4 mm long, hex head (1) replaces Model 081A97 All specifications are at room temperature unless otherwise specified. NOTES: [1] Typical. [2] Conversion Factor 1g = 9.81 m/s². [3] The high frequency tolerance is accurate within ±10% of the specified frequency. [4] Zero-based, least-squares, straight line method. [5] 1/4-28 has no equivalent in S.I. units. [6] Twisted shielded pair. [7] See PCB Declaration of Conformance PS023 for details. [7]

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