200355-12-00-00 Bently Nevada 200350 Accelerometer

Bently Nevada 200355-12-00-00 Accelerometer – Dynamic Vibration Measurement for Industrial Machinery

The Bently Nevada 200355-12-00-00 is a piezoelectric accelerometer from the 200350 Series, designed to measure machinery vibration across a broad frequency range. Its ceramic sensing element uses a shear-mode measurement geometry to convert mechanical acceleration into an electrical output for condition monitoring and vibration analysis systems.

With a nominal sensitivity of 100 mV/g ±20%, a measurement range of ±50 g, and a frequency response of 0.5 Hz to 10 kHz (±3 dB), this sensor supports vibration measurement on industrial rotating equipment. Its stainless steel housing, welded hermetic sealing, and IP68 enclosure rating support installation in demanding industrial environments.

Model Configuration Breakdown

The model number identifies the sensor family, mounting configuration, sensitivity tolerance, and approval option.

Code Segment	Configuration	Description
200355	Product model	Bently Nevada 200350 Series accelerometer
12	Mounting option	M8 × 1.25 adhesive stud mount
00	Sensitivity tolerance	100 mV/g ±20%
00	Agency approval	No agency approvals

Configuration note: The supplied specification also lists a 1/4-28 female mounting thread. Confirm the required mounting stud or adapter arrangement against the sensor drawing and installed mounting hardware before ordering a replacement.

Measurement Performance and Signal Characteristics

Parameter	Specification
Sensor type	Piezoelectric accelerometer
Sensing element	Ceramic
Sensing geometry	Shear
Sensitivity	100 mV/g ±20% (10.2 mV/m/s² ±20%)
Frequency range	30–600,000 cpm (0.5–10,000 Hz), ±3 dB
Measurement range	±50 g
Transverse sensitivity	≤7%
Amplitude linearity	±1%
Mounted resonant frequency	1,500 kcpm (25 kHz)
Broadband electrical noise	350 μg (3,434 μm/s²), 1–10 kHz
Output bias voltage	8–12 VDC
Output impedance	<150 Ω
Discharge time constant	≥0.3 sec
Settling time	2.0 sec to within 1% of bias

Power Requirements and Electrical Integration

The accelerometer uses constant-current excitation and provides a voltage output proportional to the measured acceleration. The receiving instrument must supply compatible sensor excitation and support the accelerometer's output bias and impedance characteristics.

• Excitation voltage: 18–28 VDC
• Constant-current excitation: 2–20 mA
• Output bias voltage: 8–12 VDC
• Output impedance: Less than 150 ohms
• Electrical isolation at case: Greater than 10⁸ ohms
• Electrical connector: 2-pin MIL-C-5015
• Connector position: Top

When integrating the sensor with a vibration monitor or data acquisition system, check the input's constant-current supply, voltage compliance, signal conditioning, and connector pin assignment. A mismatch in excitation or input configuration can produce an incorrect bias level, unstable readings, or loss of the vibration signal.

Mechanical Design and Environmental Protection

Mechanical / Environmental Parameter	Specification
Housing material	Stainless steel
Sealing	Welded hermetic
Enclosure rating	IP68
Mounting thread	1/4-28 female
Mounting stud option	M8 × 1.25 adhesive stud mount
Maximum mounting torque	2–5 ft-lb (2.7–6.8 N·m)
Hex size	11/16 in (approximately 1.8 cm)
Height	1.65 in (4.24 cm), as specified
Weight	0.051 kg
Operating temperature	−65°F to +250°F (−54°C to +121°C)
Shock survivability	5,000 g peak
Relative humidity	100%, condensing, non-submerged
Manufacturing origin	Made in U.S.A., as specified

Installation Considerations for Reliable Vibration Data

Accelerometer mounting quality directly affects the usable frequency response and repeatability of vibration measurements. Before installation, inspect the mounting surface for contamination, paint, corrosion, and uneven contact. Prepare the mounting location according to the applicable installation procedure and confirm that the selected stud or adhesive arrangement matches the machine surface and sensor interface.

1. Confirm the mounting interface: Check the M8 × 1.25 adhesive stud option and the listed 1/4-28 female thread against the installation drawing.
2. Prepare the contact surface: Use a clean, flat mounting location to reduce measurement errors caused by poor mechanical coupling.
3. Control mounting torque: Follow the applicable mounting instructions and do not exceed the specified torque limit.
4. Verify electrical compatibility: Confirm constant-current excitation, voltage range, connector wiring, and input impedance before energizing the measurement circuit.
5. Check the output after installation: Allow the specified settling time and verify the bias voltage before evaluating vibration amplitude or frequency data.

Typical Industrial Applications

The broad frequency response and acceleration measurement range make the 200355-12-00-00 suitable for vibration monitoring tasks where machinery condition must be evaluated through acceleration signals.

• Vibration monitoring of pumps, motors, and compressors
• Condition assessment of rotating machinery and mechanical assemblies
• High-frequency vibration measurement for bearing and gear-related analysis
• Industrial equipment vibration trending and diagnostic data acquisition
• Machinery maintenance programs requiring repeatable acceleration measurements

Replacement Selection and Technical Verification

When replacing an installed accelerometer, do not select a sensor by sensitivity alone. Confirm the mounting configuration, frequency response, measurement range, excitation requirements, connector type, and approval status. The 200355-12-00-00 specification lists no agency approvals, so it should not be treated as an approved sensor for a hazardous-area installation unless the complete installation design provides the required protection through other applicable measures.

For retrofit work, compare the existing sensor's mounting arrangement and signal-conditioning requirements with the replacement specification. Also verify whether the receiving monitor expects an acceleration signal with a 100 mV/g nominal sensitivity and whether its input supports the specified bias voltage and constant-current excitation.

Warranty and Shipping

• Warranty: 12 months
• Shipping methods: FedEx, UPS, and DHL
• Product support: Model and configuration verification can help reduce ordering errors during replacement and maintenance planning.

Frequently Asked Questions

1. What should be checked if the accelerometer output has a normal bias voltage but shows unusually low vibration amplitude?

First inspect the mechanical coupling between the sensor and machine surface. A loose stud, contaminated mounting face, or unsuitable mounting adapter can reduce high-frequency response. Then verify the monitor's sensitivity setting and signal scaling. A nominal 100 mV/g sensor configured with an incorrect sensitivity value can produce misleading engineering-unit readings even when the electrical signal is present.

2. Can this accelerometer be installed in a hazardous area?

The supplied configuration specifies agency approval option 00, meaning no agency approvals. Do not assume that the IP68 enclosure rating provides hazardous-area certification. Review the site classification, applicable electrical installation requirements, and equipment approval documentation before selecting this model for a classified location.

3. How does mounting stiffness affect the measurement result?

Mounting stiffness influences the mechanical transfer of vibration from the machine to the sensing element. A rigid, clean, correctly installed mounting interface generally provides better high-frequency response than a loose or flexible arrangement. For bearing and gear diagnostics, mounting location and attachment method should remain consistent when comparing vibration trends over time.

4. What is the practical significance of the 25 kHz mounted resonant frequency?

The mounted resonant frequency identifies a mechanical resonance characteristic of the sensor under its specified mounting condition. It is not the recommended upper measurement frequency. For this model, the stated measurement frequency range is 0.5 Hz to 10 kHz at ±3 dB. Engineers should use that range when evaluating the suitability of the sensor for a measurement task.

5. What information should be provided when requesting a replacement quotation?

Provide the complete model number, 200355-12-00-00, together with the existing sensor's mounting arrangement, connector details, monitor input type, and installation environment. If the application requires hazardous-area approval, state the required certification separately. These details help verify mechanical and electrical compatibility before procurement.

Product Summary

The Bently Nevada 200355-12-00-00 is a 200350 Series ceramic shear-mode accelerometer with 100 mV/g nominal sensitivity, a ±50 g measurement range, and a 0.5 Hz to 10 kHz frequency response. Its stainless steel hermetically sealed housing and IP68 rating support demanding machinery monitoring environments. Verify the mounting interface and electrical requirements against the installed system before selecting it as a replacement.

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