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Model HT780A High Temperature Compact Accelerometer

Brand: Wilcoxon Sensing Technologies
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 top-exit HT780A 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. Its compact size allows the sensor to be mounted in tight areas not accessible by full sized sensors. 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
  • Lightweight for walkaround programs
  • Prevents ground loops in permanent mount applications with proper cabling
  • Hermetically sealed
  • ESD-protected
  • Reverse wiring protection
  • Manufactured in an approved ISO 9001 facility
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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 top-exit HT780A 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. Its compact size allows the sensor to be mounted in tight areas not accessible by full sized sensors. 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
  • Lightweight for walkaround programs
  • Prevents ground loops in permanent mount applications with proper cabling
  • Hermetically sealed
  • ESD-protected
  • Reverse wiring protection
  • Manufactured in an approved ISO 9001 facility

Specifications

Approvals & Certifications

  • ISO 9001

Approvals & Certifications

  • CE

Circuit Protection

  • ESD Protection
  • Reverse Wiring Protection

Electrical Connectors

  • Mating Connector: 2-Pin, MIL-5015 Style

Element

  • Sensing Element Design: PZT, Shear

Enclosure, Body Material

  • 316L Stainless Steel

Frequency

  • Frequency Response (± 10%): 1 to 9,000 Hz
  • Frequency Response (± 3 dB): 0.5 to 14,000 Hz
  • Frequency Response (± 5%): 3 to 5,000 Hz
  • Resonance Frequency, Nominal: 30 kHz

Mounting

  • 1/4-28 UNF Tapped Hole

Noise

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

Non-Linearity

  • Amplitude Non-Linearity: 1%

Output Impedence

  • Maximum 100 Ω

Power Requirement

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

Range

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

Seal Type

  • Hermetic

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

Shock

  • Shock Limit: 5,000 G Peak

Temperature Range

  • -50° to 150° C (-58° to 302° F)

Vibration

  • Vibration Limit: 500 G Peak

Voltage

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