21000-28-05-00-052-03-02 Bently Nevada Aluminum Proximity Probe Housing 3300 XL 8mm Probe 0.5m Cable

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Product datasheet

Model number	21000-28-05-00-052-03-02
Manufacture	Bently Nevada
System	TSI
Condition	Brand New
Country of Origin	USA
HS Code	8537101190
After-Sales Support	12-months

Product information

The 21000-28-05-00-052-03-02 is a Bently Nevada aluminum proximity probe housing assembly featuring a rugged all-metal body and a 304 stainless steel sleeve. Fully compliant with API 670 standards, this unit works seamlessly with 3300 XL 8mm proximity transducer systems to deliver robust environmental protection and flexible external adjustment in hazardous area applications.

Features and benefits

Aluminum body with 304SS sleeve – Lightweight yet durable for industrial environments.
CSA Type 4 enclosure – Provides water and dust resistance for reliable outdoor use.
Fittings option 03 – Includes NPT plug, reducer, and cable seal grip for three cable sizes.
3/4-14 NPT mounting thread (F:02) – Ensures secure, standard-compatible installation.
API 670 compliant – Meets American Petroleum Institute standards for externally mounted housings.
Wide temperature range – Operates from -34°C to +177°C (-30°F to +351°F) for harsh conditions.

System Compatibility & Alternative Models

System Compatibility: Fully compatible with the Bently Nevada 3300 XL 8mm Proximitor Sensor and standard 3300 XL extension cables.
Alternative Model (Corrosive Environment Requirement): 24701 Stainless Steel Housing Assembly.

Difference: The 21000 assembly uses an anodized aluminum housing body weighing approximately 1.1 kg, making it lightweight but vulnerable to heavy chemical oxidation. The 24701 series introduces a 303 stainless steel body weighing 1.8 kg for superior acid, salt, and base corrosion resistance.

Alternative Model (Non-Explosion-Proof Modern Infrastructure): 31000 or 32000 Proximity Probe Housing Assemblies.

Difference: The legacy 21000 is an explosion-proof certified housing. The 31000 and 32000 series are advanced glass-reinforced thermoplastic enclosures recommended for superior sealing in wet/weather environments where a heavy, explosion-proof metal casing is not required.

Ordering Information Table Breakdown

This table decodes the explicit physical and functional configuration designated by the part number 21000-28-05-00-052-03-02:

Option Code	Parameter	Configured Value & Technical Meaning
21000	Base Model	Aluminum Proximity Probe Housing Assembly
28	A: Probe with Connector	3300 XL 8mm probe, selectable hazardous area approvals
05	B: Probe Cable Length	0.5 m (20 in) integrated cable
00	C: Standoff Adapter Length	No standoff adapter
052	D: Probe Penetration Option	5.2 in (132 mm) sleeve penetration length
03	E: Fittings Option	One cable seal grip with grommets (5/16 to 3/8 inches)
02	F: Mounting Thread Option	3/4-14 NPT outer body mounting casing thread

FAQ

Q1: What is the material of the housing body and sleeve for this model?
A1: The housing body is aluminum (21000) and the sleeve is 304 stainless steel.

Q2: What type of fittings are included with EE=03 option?
A2: It includes one 3/4-14 NPT plug, one 3/4-14 to 1/2-14 NPT reducer, and one cable seal grip with grommets for cable diameters from 1/8” to 3/8”.

Q3: Is this assembly suitable for intrinsically safe applications?
A3: Yes, the 21000 aluminum housing with selectable hazardous area approvals (AA=28) can be used for intrinsically safe applications per CSA certification.

Q4: What is the maximum probe penetration (C+D) before sleeve support is required?
A4: Sleeve support (e.g., part 37948-01) is required if total penetration (C plus D) exceeds 300 mm (12 inches). This model has D=5.0” (127 mm) and C=00, so no support needed.

Q5: Can this housing be ordered without a probe?
A5: Yes, selecting AA=00 and BB=00 orders the housing without a probe. However, this specific PN includes a probe (AA=28).

Accessories

Part Number	Description
37948-01	Probe Support / Oil Seal Recommended for sleeves longer than 305 mm (12 in)

Individual Probe Sleeve for 21000/24701 Proximity Probe Housings

44382-AAA

A: Measured Probe Sleeve Length

Recommendation

Order in increments of 0.1 in (3 mm)

The individual probe sleeve length does not include the distance from the end of the sleeve to the probe tip or the gap from the probe tip to the target material. If only the part number of the original housing is known, and the sleeve cannot be measured, use the following table to determine the sleeve length:

AAA	Description
Standoff adapter option from original housing (21000, CA21000, 24701, or CA24701 option C) plus Probe penetration option from original housing (21000, CA21000, 24701, or CA24701 option D) and 045	All housing AAA options except NSv and 11mm probes (options other than A:06, A:12, A:26, A:27, A:29, A:30, A:31, A:32, A:35, or A:36)
	Example Original part number 21000-16-10-15-035-03-02 AAA option for replacement sleeve (015 + 035 + 045) = 095
Standoff Adapter Option from original housing (21000, CA21000, 24701, or CA24701 option C) plus Probe penetration option from original housing (21000, CA21000, 24701, or CA24701 option D) and 046	Housing AAA options for 3300 NSv probe options (A:26, A:27, A:31, or A:32
	Example Original part number 24701-31-10-15-090-03-02 AAA option for replacement sleeve (015 + 090+ 046) = 151
Standoff Adapter Option from original housing (21000, CA21000, 24701, or CA24701 option C) plus Probe penetration option from original housing (21000, CA21000, 24701, or CA24701 option D) and 037	Housing AAA options for 3300 XL 11mm probe options (A:29, A:30, A:35, or A:36)
	Example Original part number CA24701 -36-10-40-053- 02-02 AAA option for replacement sleeve (040 + 053+ 037) = 130
Standoff Adapter Option from original housing (21000, CA21000, 24701, or CA24701 option C) plus Probe penetration option from original housing (21000, CA21000, 24701, or CA24701 option D) and 039	Housing AAA options for 7200 Series 11mm probe options (A:06 or A:12)
	Example Original part number CA24701 -12-10-30-113-01 - 02 AAA option for replacement sleeve (030 + 113+ 039) = 182
Minimum Probe Sleeve Length
For all probes except NSv and 11mm probes	5.5 in (140 mm) = 055
3300 XL NSv probe	5.5 in (142 mm) = 056
3300 XL 11mm probe	4.7 in (119 mm) = 047
Maximum Probe Sleeve Length
All 0.5 meter probes except NSv and 11mm probes	18.0 in (457 mm) = 180
3300 XL NSv 0.5 meter probe	18.1 in (460 mm) = 181
7200-series 0.5 meter 11mm probe	15.4 in (391 mm) = 154
All 1.0 meter probes except NSv and 11mm probes	33.7 in (856 mm) = 337
3300 XL NSv 1.0 meter probe	33.8 in (859 mm) = 338
3300 XL 1.0 meter 11mm probe	32.9 in (836 mm) = 329
7200 Series 1.0 meter 11mm probe	33.1 in (841 mm) = 331

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