For applications in which extremely high temperature operation is needed, Wilcoxon offers the HT series of accelerometers. Dryer sections of a paper machine regularly create conditions up to 150º C. Vibration monitoring sensors must be capable of operating continuously in hot environments without degradation. HT series sensors are built with extended range components that are manufactured to withstand high temperatures for long periods of time without failing.

The side-exit HT787A 100 mV/g broadband sensor operates at high temperatures for monitoring machine vibration on a wide range of rotating equipment such as motors, pumps, fans, compressors, turbines and generators. The captive screw permits orientation at any angle, facilitating mounting in close-fitting locations and minimizing cable strain. The 316L stainless steel case provides rugged durability for most extreme environments. The sensing element is housed in a case-isolated Faraday shield, providing maximum protection from ground loops and RF interference.

Features:

  • Mounts in any orientation
  • Hermetically sealed
  • ESD-protected
  • Reverse wiring protection
  • Manufactured in an approved ISO 9001 facility
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Agency Approvals

  • CE

Tests & Certificates

  • ISO 9001

Temperature Range

  • -50° to 150° C (-58° to 302° F)

Sensitivity

  • Base Strain Sensitivity, Maximum: 0.0002 g/μstrain
  • Electromagnetic Sensitivity, Equivalent g, Maximum: 70 µg/gauss
  • Sensitivity, ±5%, 25° C (77° F): 100 mV/g
  • Transverse Sensitivity Maximum: 5% of Axial

Non Linearity

  • Amplitude Nonlinearity: 1%

Vibration

  • Vibration Limit: 500g Peak

Shock

  • Shock Limit: 5,000g Peak

Range

  • Acceleration Range, Vdc >25 V: 80 g Peak

Power Requirement

  • 18-30 Vdc
  • Current Regulating Diode: 2-10 mA

Output Impedence

  • Maximum 100 Ohms

Frequency

  • Frequency Response (±10%): 1 to 5,000 Hz
  • Frequency Response (±3 dB): 0.7 to 10,000 Hz
  • Resonance Frequency, Nominal: 22 kHz

Electrical Connectors

  • Cable (J9F, J9T2A)
  • Mating Connector: 2-Pin, MIL-5015 Style

Voltage

  • Bias Output Voltage at 150° C (302° F): 12 Vdc
  • Bias Output Voltage at 25° C (77° F): 13 Vdc

Circuit Protection

  • ESD Protection
  • Reverse Wiring Protection

Mounting

  • 1/4-28 Captive Screw Mount

Mounting Position

  • Any Orientation

Enclosure/Body Material

  • 316L Stainless Steel

Element

  • Sensing Element Design: PZT, Shear

Seal Type

  • Hermetic

Noise

  • Electrical Noise, Equivalent g, Nominal (Spectral: 10 Hz) at 25° C (77° F): 10 µg/√Hz
  • Electrical Noise, Equivalent g, Nominal (Broadband: 2.5 Hz to 25 kHz) at 25° C (77° F): 700 µg
  • Electrical Noise, Equivalent g, Nominal (Spectral: 100, 1,000 Hz) at 25° C (77° F): 5 µg/√Hz
  • Electrical Noise, Equivalent g, Nominal (Spectral: 100, 1,000 Hz) at 150° C (302° F): 7 µg/√Hz
  • Electrical Noise, Equivalent g, Nominal (Broadband: 2.5 Hz to 25 kHz) at 150° C (302° F): 1,100 µg
  • Electrical Noise, Equivalent g, Nominal (Spectral: 10 Hz) at 150° C (302° F): 14 µg/√Hz