21000-28-10-20-095-03-02 | Bently Nevada 9.5 in Probe Housing Assembly

What Is the 21000-28-10-20-095-03-02?

When machinery protection demands precise vibration measurement, the 21000-28-10-20-095-03-02 from Bently Nevada provides a robust solution. This proximity probe housing assembly is part of the 21000 series, designed for externally mounted probes in hazardous areas. It combines an aluminum body with a 304 stainless steel sleeve, ensuring durability in industrial environments. With a 1.0 m (39 in) probe cable and a 9.5 in probe penetration, it offers flexibility for tight installations.

Key Features & Technical Specs

• Probe Type: 3300 XL 8 mm probe with selectable hazardous area approvals.
• Probe Cable Length: 1.0 m (39 in).
• Standoff Adapter Length: 2 in (Option C Dimension).
• Probe Penetration: 9.5 in (Option D Dimension).
• Fittings: One 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with grommets for cable sizes 1/8 to 3/16 in, 1/4 to 5/16 in, and 5/16 to 3/8 in.
• Mounting Thread: 3/4-14 NPT.
• Material: Aluminum body with 304 stainless steel sleeve.
• Weight: 1.1 kg (2.4 lb) typical, without fittings.

A distinctive spec is the 9.5 in probe penetration, which allows deep insertion into machine casings for accurate vibration data. This reduces side view effects and improves reliability.

Industry Applications & Use Cases

For example, in rotating machinery such as turbines and compressors, the 21000-28-10-20-095-03-02 monitors shaft vibration and position. Its CSA Type 4 enclosure and explosion-proof rating make it suitable for hazardous areas. Additionally, it complies with API 670 standard for externally mounted proximity probe housings. Consequently, engineers can trust it for critical asset protection.

Installation Guide & Setup

During installation, ensure the probe penetration length (C plus D) does not exceed 300 mm (12 in) to avoid resonance. If it does, add sleeve support near the probe. The adjustment range of probe penetration option D is 13 mm (± 0.5 in). For probe penetration lengths between 1.0 and 2.0 inches, counter bore the machine case to reduce side view or rear view effects. Use the provided fittings: a 3/4-14 NPT plug and a reducer to 1/2-14 NPT. Secure the cable seal grip with appropriate grommets.

Maintenance & Reliability Tips

Regular inspection of the O-rings and thread seal ensures a tight enclosure. Check the probe cable for wear, especially near the connector. Because the housing is rated CSA Type 4, it resists dust and water ingress. Periodically verify that the mounting thread (3/4-14 NPT) remains secure. Following these steps extends the service life and reduces downtime.

Compatibility & Integration

The 21000-28-10-20-095-03-02 works with Bently Nevada monitoring systems that accept 3300 XL 8 mm probes. It integrates with existing vibration monitoring setups. For hazardous area applications, order the probe with selectable approvals. The housing is available with CSA approvals for explosion-proof environments.

Troubleshooting & Common Issues

If the probe signal is noisy, check the cable length and ensure it does not exceed the maximum (C) + (D) dimension of 13.5 in (34.3 cm) for a 0.5 m cable. Verify that the probe penetration adjustment is within the 13 mm range. If the probe P/N and S/N are not visible on the flag label, the combination of C plus D options may hide them. In such cases, refer to the documentation.

FAQs

Q: What is the probe cable length of the 21000-28-10-20-095-03-02?

A: The probe cable length is 1.0 m (39 in).

Q: What fittings are included with this housing assembly?

A: It includes one 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and a cable seal grip with grommets for cable sizes 1/8 to 3/16 in, 1/4 to 5/16 in, and 5/16 to 3/8 in.

Q: Is the 21000-28-10-20-095-03-02 suitable for hazardous areas?

A: Yes, it is available with CSA approvals and is rated explosion proof for hazardous areas.

Q: What is the weight of this housing assembly?

A: The typical weight is 1.1 kg (2.4 lb) without fittings.

Q: What mounting thread does the 21000-28-10-20-095-03-02 use?

A: It uses a 3/4-14 NPT mounting thread.

Product Support & Availability

The 21000-28-10-20-095-03-02 is in stock and ready to ship from Petro Auto Tech. It comes as new and original in factory packing with a 12-month warranty. Contact Petro Auto Tech for lifecycle status and ordering details.