Product Specifications

Part Number	21501-00-16-05-02
Probe and Cable Operating Temperature Range	-34°C ~ +177°C (-30°F ~ +350°F)
Preamplifier Operating Temperature Range	-51°C ~ +100°C (-60°F ~ +212°F)
Operating Humidity	Up to 95%, non-condensing
Probe Head Diameter	3.4 mm (0.111 in)
Power Requirements	-17.5 Vdc to -26 Vdc
ASF/Sensitivity	200 mV/mil (7.87 V/mm)
Frequency Response	0 Hz to 10 kHz
Unthreaded Length (code 00)	0.0 in
Overall Case Length (code 16)	1.6 in
Total Length (code 05)	0.5 meters (1.6 feet)
Connector (code 02)	Miniature Male Coaxial

The Bently Nevada 21000-28-05-40-028-04-02 is an externally mounted Proximity Probe Housing Assembly constructed to provide heavy-duty mechanical protection and simple sensor adjustments on rotating machinery. Built with a rugged aluminum enclosure, this unit enables technicians to safely access, inspect, and adjust the internal proximity probe or its extension cable directly from outside the machine casing without requiring a system shutdown. The assembly holds official Canadian Standards Association (CSA) approvals, certifying it as explosion-proof for hazardous locations and approved for intrinsically safe applications. Fully compliant with the American Petroleum Institute (API) 670 Standard for externally mounted proximity probe housings, it features a certified CSA Type 4 weatherproof rating. This specific model features a 2.8-inch sleeve length configuration to accommodate precise physical installation clearance, ensuring robust stability within the probe channel.

Frequently asked questions：

Q: What is the standoff adapter length of the Bently Nevada 21000-28-05-40-028-04-02 housing assembly?
A: This 21000-28-05-40-028-04-02 model includes a 4.0-inch standoff adapter (-40), providing additional spacing between the mounting surface and the probe installation point.

Q:What safety and industry standards does the 21000-28-05-40-028-04-02 meet?
A:The 21000-28-05-40-028-04-02 carries official Canadian Standards Association (CSA) explosion-proof certifications for hazardous areas, functions within intrinsically safe configurations, is certified as a CSA Type 4 enclosure, and fully complies with the API 670 Standard.

Q:How is the sleeve length configuration handled for the 21000-28-05-40-028-04-02?
A:This specific model is configured with a 2.8-inch sleeve length. The sleeve length must always be matched to your unique machine case penetration depth, and the internal probe lead wire must be longer than this sleeve to ensure correct connections.

Product Applications

Oil & Gas / Refineries
Power Generation Plants
Chemical Processing Plants
Steel Mills

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