21000 and 24701 Proximity Probe Housing
Assemblies
Datasheet

Bently Nevada Machinery Condition Monitoring141600 Rev. W

Description
To externally mount proximity probes, use one of these allmetal Proximity Probe Housing Assemblies:ll

21000 aluminum probe housing assembly
24701 stainless steel probe housing assembly

The 21000 and 24701 Proximity Probe Housing Assemblies
consist of the following parts:
l
l
l
l
l
l
l
l

A dome cover that screws into the body of the housing
Threaded ports for conduit connections
A probe sleeve of optional lengthO-rings
A reverse mount proximity probe
A thread seal
Optional conduit fittings
An optional standoff adapter
A newer 31000/32000 proximity probe housing
assembly is available with more flexible mounting
options, better environmental resistance, and otherimproved features. We recommend this proximity
probe housing assembly for installations where an
explosion proof housing is not required. See 31000
and 32000 Proximity Probe Housings productdatasheet (document 141610).

The 21000 and 24701 Proximity Probe Housing Assemblies areavailable with Canadian Standards Association (CSA)
approvals. They are rated explosion proof for hazardous
areas.

21000 and 24701 Proximity Probe Housing Assemblies
Datasheet

141600 Rev. W

You can order hazardous area approved
proximity probes with 21000 aluminum and24701 stainless steel housings for intrinsicallysafe applications. Both housings are certified
as CSA Type 4 enclosures and are fullycompliant with the American Petroleum
Institute's (API) 670 Standard for externallymounted proximity probe housings.
The 164818 Compact Proximity Probe Housing is
also available for applications with space
restrictions. Ceramic capped probes areavailable with the 164818 housing.
Sleeve length is determined by the location inwhich the probe and housing are installed. The
probe lead must be longer than the sleeve.
Sleeve lengths longer than 304 mm (12 inches)require additional sleeve support to reduce thevibration associated with unsupported long
sleeve lengths.
Bently Nevada offers a probe support and oilseal (part number 37948-01) for long sleevesthat must go through an inner bearing housing.
We also make custom sleeve supports.

Related Documents
For probe information, refer to the following
manuals:
n

n

n

n

3300 XL 8mm & 3300 5mm Proximity
Transducer System User Guide(document 141078)
3300 XL NSv Proximity Transducer System
User Guide (document 147357)
3300 XL 11mm Proximity Transducer
System Installation User Guide(document 146255)
Radiation Resistant Probe and Proximitor
System (document TW8029407)

2/19

21000 and 24701 Proximity Probe Housing Assemblies
Datasheet

141600 Rev. W

Specifications
Environmental
Temperature Range
3300 XL 8mm Probe
Operating andstorage-51°C to +177°C (-60°F to+351°F)

3300 XL 11mm Probe
Operating andstorage-51°C to +177°C (-60°F to+351°F)

3300 NSv Probe
Operating-34°C to +177°C (-30°F to+351°F)

Storage-51°C to +177°C (-60°F to+351°F)CAUTION
EQUIPMENT DAMAGE
Exposing 3300 XL or 3300 NSv
probes to temperatures below-34°C (-30°F) may causepremature failure of theirpressure seals.

MechanicalMaterial
21000

Aluminum body with 304
stainless steel sleeve

24701

303 stainless steel body,with 304 stainless steel
sleeveMass (Weight)
21000

1.1 kg (2.4 lb) typical,
without fittings

24701

1.8 kg (4.1 lb) typical,
without fittings

3/19

Monitor Module

1 full-height front slot

I/O Modules

1 full-height rear slot

21000 and 24701 Proximity Probe Housing Assemblies
Datasheet

141600 Rev. W

Hazardous Area Approvals

Compliance and Certifications

For the detailed listing of country andproduct-specific approvals, refer tothe Approvals Quick Reference Guide(108M1756).

RoHS
European Community Directive:
RoHS Directive 2011/65/EU

For additional technicaldocumentation, please log in to
bntechsupport.com and access the
Bently Nevada Media Library.

21000 and 24701
CA21000 and CA24701 housings are certified by
CSA for explosion-proof applications in thefollowing areas:
North
AmericaClass I Divisions 1 and 2 Groups C and D
Class II Divisions 1 and 2 Groups E, F and G
Circuit is non-incendive when connected
per drawing 140979
Class III
Enclosure Type 4
T5 @ Ta = -50°C to +40°C
T4 @ Ta = -50°C to +80°C

CA housings can only be ordered for North
American End Users. For all other end user
countries, housings 21000 and 24701 must beordered.

4/19

21000 and 24701 Proximity Probe Housing Assemblies
Datasheet

141600 Rev. W

Ordering Information
For the detailed listing of country andproduct-specific approvals, refer tothe Approvals Quick Reference Guide(108M1756).
For additional technicaldocumentation, please log in to
bntechsupport.com and access the
Bently Nevada Media Library.

35

3300 XL 11mm probe with connector
protector

363300 XL 11mm probe with connector
protector, selectable hazardous area
approvals

37

3300 XL 8mm probe, ETR, selectablehazardous area approvals(available for 21000 only)

B: Probe Cable Length00

Probe cable not required

Proximity Probe Housing
Assemblies

05

0.5 m (20 in)

10

1.0 m (39 in)

21000-AA-BB-CC-DDD-EE-FF

1212.0 in18

18.0 in24

24.0 in30

30.0 in36

36.0 in

A: Probe with Connector
00

Probe not required

14

420 nuclear

16

3300 XL 8mm probe

26

3300 XL NSv probe

27

3300 XL NSv probe, selectablehazardous area approvals

28

3300 XL 8mm probe, selectablehazardous area approvals

29

3300 XL 11mm probe

30

3300 XL 11mm probe, selectablehazardous area approvals

31

3300 XL NSv probe with connector
protector

32

3300 XL NSv probe with connector
protector, selectable hazardous area
approvals

33

3300 XL 8mm probe with connector
protector

34

3300 XL 8mm probe with connector
protector, selectable hazardous area
approvals

C: Standoff Adapter (Option C Dimension)
15

Minimum length 1.5 in (38 mm)

75

Maximum length 7.5 in (191 mm)
Recommendation
Order in increments of 0.5 in (13 mm)
Examples
1.5 in (38 mm) = 15
No standoff adapter = 00

D: Probe Penetration (Option D Dimension)
10

Minimum length 1.0 in (25.4 mm)

Other
Recommendation
Order in increments of 0.1 in (3 mm)

5/19

21000 and 24701 Proximity Probe Housing Assemblies
Datasheet

141600 Rev. W

Although explosion-proof fittings areavailable for all housings, only CA
versions of the housing are rated as
explosion-proof by CSA when orderedwith the E:00, E:01, E:02, or E:04 options.

Examples
3.7 in (94 mm) = 037
2.4 in (569 mm) = 224
Probe P/N and S/N may be displayedon a flag label for some combinationsof the C plus D options where only asmall section of the probe cable isvisible.

F: Mounting Thread01

As cast without threads
3/4-14 NPT

For probe penetration lengths
between 1.0 and 2.0 inches, it may benecessary to counter bore themachine case to reduce probe sideview or rear view effects.

02

04

Must be ordered if Standoff
Adapter Length option is not00.
1/2-14 BSP

24701-AA-BB-CC-DDD-EE-FF

If you select a probe penetration
length (C plus D) greater than 300
mm (12 in), you must add sleeve
support near the probe to prevent
resonance from occurring.
Adjustment range of probe
penetration option D is 13 mm (± 0.5in). For the maximum value of C plusD, see 21000/CA21000 Dimensions on
page 1.

A: Probe with Connector

E: Fittings

00

Probe not required

14

420 nuclear

16

3300 XL 8mm probe

26

3300 XL NSv probe

27

3300 XL NSv probe, withapproval option

00

Without fittings

28

3300 XL 8mm, with approval
option01

One 3/4-14 NPT explosion-proof fitting
One 3/4-14 NPT plug29

3300 XL 11mm

02

Two 3/4-14 NPT explosion-proof fittings

30

3300 XL 11mm, with approval
optionOne 3/4-14 NPT plug
One 3/4-14 to 1/2-14 NPT reducer

31

One cable seal grip with grommets forthe following cable sizes:

3300 XL NSv with connector
protector

32• 1/8 to 3/16 inches• 1/4 to 5/16 inches• 5/16 to 3/8 inches

3300 XL NSv with connector
protector and approval option

33

3300 XL 8mm with connector
protector

One 3/4-14 NPT plug only

34

3300 XL 8mm with connector
protector and approval option

03

04

6/19

21000 and 24701 Proximity Probe Housing Assemblies
Datasheet

35

3300 XL 11mm with connector
protector

363300 XL 11mm with connector
protector and approval option

37

3300 XL 8mm ETR, withapproval option

141600 Rev. W

Recommendation
Order in increments of 0.1 in (3mm)
Probe P/N and S/N may bedisplayed on a flag label for somecombinations of the C plus D
options where only a small sectionof the probe cable is visible.

B: Probe Cable Length00

Probe cable not required05

20 in (0.5 m)

1039 in (1.0 m)

12

12.0 ft (3.6 m)

18

18.0 ft (3.6 m)

24

24.0 ft (7.3 m)

30

24.0 ft (7.3 m)

3636.0 ft (10.9 m)

For probe penetration lengths
between 1.0 and 2.0 inches, it may
be necessary to counter bore themachine case to reduce probe sideview or rear view effects.
If you select a probe penetration
length (C plus D) greater than 300
mm (12 in), you must add sleeve
support near the probe to prevent
resonance from occurring.
Adjustment range of probe
penetration option D is 13 mm (± 0.5in). For the maximum value of C plusD, see 21000/CA21000 Dimensions
on page 1.

C: Standoff Adapter (Option C Dimension)
15

Minimum length 1.5 in (38 mm)

75

Maximum length 7.5 in (191mm)
Examples

E: Fittings

1.5 in (38 mm) = 15
No standoff adapter = 00

00

Without fittings

Recommendation

01

One 3/4-14 NPT explosion-proof
fitting
One 3/4-14 NPT plug02

Two 3/4-14 NPT explosion-proof
fittings

Order in increments of 0.5 in (13mm)
D: Probe Penetration (Option D Dimension)
010

Minimum length 1.0 in (25.4
mm)

Other

See 21000/CA21000 Dimensions
on page 1.
Example3.7 in (94 mm) = 037
22.4 in (569 mm) = 224

7/19

21000 and 24701 Proximity Probe Housing Assemblies
Datasheet

141600 Rev. W

Explosion-Proof Housing
Assemblies

One 3/4-14 NPT plug
One 3/4-14 to 1/2-14 NPT
reducer03

For CA21000 housing, option F mustbe 02. Options 02 and 03 for mounting
threads have more threads thanstandard NPT threads. They havebeen machined to haveapproximately 5 - 7 full threads toincrease mounting strength andstiffness.

One cable seal grip withgrommets for the following
cable sizes:• 1/8 to 3/16 inches• 1/4 to 5/16 inches• 5/16 to 3/8 inches04

One 3/4-14 NPT plug only

CA21000-AA-BB-CC-DDD-EE-F02

Although explosion-proof fittings
are available for all housings, only
CA versions of the housing are rated
as explosion-proof by CSA whenordered with the E:00, E:01, E:02, or E:04
options.

Options A:00 and B:00 are linked. If you
choose A:00, you must also select B:00.
A: Probe with Connector

F: Mounting Thread

00

Probe not required01

As cast without threads

01

190 series, CSA, BNPS connector

3/4-14 NPT (see note [1] below)

02

190 series, CSA, API connector

273300 XL NSv, multiple approval

28

3300 XL 8mm, multiple
approval

303300 XL 11mm, multiple
approval

32

3300 XL NSv with connector
protector, multiple approval

34

3300 XL 8mm with connector
protector, multiple approval

363300 XL 11mm with connector
protector, multiple approval

02

Must be ordered if
Standoff Adapter
Length Option is not
00.

03

1-11 1/2 NPT (see note [1] below)04

1/2-14 BSP

05

7/8-14 UNF-2A(1) For CA21000 housing, option F
must be 02. Options 02 and 03 formounting threads have morethreads than standard NPT threads.
They have been machined to haveapproximately 5 - 7 full threads toincrease mounting strength andstiffness.

B: Probe Cable Length05

0.5 meter (20 inches)20

1.0 meter (39 inches)

C: Standoff Adapter (Option C Dimension)
15

8/19

Minimum length 1.5 in (38 mm)

21000 and 24701 Proximity Probe Housing Assemblies
Datasheet75

141600 Rev. W

Maximum length 7.5 in (191mm)

Probe P/N and S/N may bedisplayed on a flag label for somecombinations of the C plus D
options where only a small sectionof the probe cable is visible.

Example1.5 in (38 mm) = 15
No Standoff adapter = 00

For probe penetration lengths
between 1.0 and 2.0 inches, it may
be necessary to counter bore themachine case to reduce probe sideview or rear view effects.

Recommendation
Order in increments of 0.5 in (13mm)
D: Probe Penetration (Option D Dimension)
010

Minimum length 1.0 in (25.4
mm)

Other

See 21000/CA21000 Proximity
Probe Housing Assembly on
page 16.

If you select a probe penetration
length (C plus D) greater than 300
mm (12 in), you must add sleeve
support near the probe to prevent
resonance from occurring.
Adjustment range of probe
penetration option D is 13 mm (± 0.5in). For the maximum value of C plusD, see 21000/CA21000 Dimensions
on page 1.

Example3.7 in (94 mm) = 037
22.4 in (569 mm) = 224
Recommendation

E: Fittings

Order in increments of 0.1 in (3mm)

00

Without fittings

01

One 3/4-14 NPT explosion-proof
fitting
One 3/4-14 NPT plug02

Two 3/4-14 NPT explosion-proof
fittings
One 3/4-14 NPT plug
One 3/4-14 to 1/2-14 NPT
reducer

03

One cable seal grip withgrommets for the following
cable sizes:• 1/8 to 3/16 inches• 1/4 to 5/16 inches• 5/16 to 3/8 inches

04

9/19

One 3/4-14 NPT plug only

21000 and 24701 Proximity Probe Housing Assemblies
Datasheet

141600 Rev. W

Although explosion-proof fittings
are available for all housings, only
CA versions of the housing are rated
as explosion-proof by CSA whenordered with the E:00, E:01, E:02, or
E:04 options.

18

18.0 ft (3.6 m)

24

24.0 ft (7.3 m)

30

24.0 ft (7.3 m)

3636.0 ft (10.9 m)

C: Standoff Adapter (Option C Dimension)

When ordering a proximitor and an extension
cable with the housing, choose a probe withmatching approval options.
You can only order probes for
CA21000 or CA24701 with multiple
approvals. To order CA versions withno probe, select the A:00 option.

15

Minimum length 1.5 in (38 mm)

75

Maximum length 7.5 in (191mm)
Examples
1.5 in (38 mm) = 15
No standoff adapter = 00
Recommendation

CA24701-AA-BB-CC-DDD-EE-FF

Order in increments of 0.5 in (13mm)

A: Probe with Connector
00

Probe not required

D: Probe Penetration (Option D Dimension)01

190 series, CSA, BNPS connector

010

02

190 series, CSA, API connector

Minimum length 1.0 in (25.4mm)

273300 XL NSv , multiple approval

Other

28

3300 XL 8mm, multiple
approval

See 24701/CA24701 Proximity
Probe Housing Assembly on
page 17.

30

3300 XL 11mm, multiple
approval

3.7 in (94 mm) = 037
22.4 in (569 mm) = 224

323300 XL NSv with connector
protector, multiple approval

Recommendation

34

3300 XL 8mm with connector
protector, multiple approval

363300 XL 11mm with connector
protector, multiple approval

ExampleOrder in increments of 0.1 in (3mm)

B: Probe Cable Length00

Probe cable not required05

20 in (0.5 m)

1039 in (1.0 m)

12

12.0 ft (3.6 m)

10/19

21000 and 24701 Proximity Probe Housing Assemblies
Datasheet

141600 Rev. W

Although explosion-proof fittings
are available for all housings, only
CA versions of the housing are rated
as explosion-proof by CSA whenordered with the E:00, E:01, E:02, or
E:04 options.

Probe P/N and S/N may bedisplayed on a flag label for somecombinations of the C plus D
options where only a small sectionof the probe cable is visible.
For probe penetration lengths
between 1.0 and 2.0 inches, it may
be necessary to counter bore themachine case to reduce probe sideview or rear view effects.

When ordering a proximitor and an extension
cable with the housing, choose a probe withmatching approval options.
You can only order probes for
CA21000 or CA24701 with multiple
approvals. To order CA versions withno probe, select the A:00 option.

If you select a probe penetration
length (C plus D) greater than 300
mm (12 in), you must add sleeve
support near the probe to prevent
resonance from occurring.
Adjustment range of probe
penetration option D is 13 mm (± 0.5in). For the maximum value of C plusD, see 21000/CA21000 Dimensions
on page 1.

F: Mounting Thread01

3/4-14 NPT (see note [1] below).
02

E: Fittings
00

Without fittings

01

One 3/4-14 NPT explosion-proof
fitting
One 3/4-14 NPT plug02

Two 3/4-14 NPT explosion-proof
fittings

One cable seal grip withgrommets for the following
cable sizes:• 1/8 to 3/16 inches• 1/4 to 5/16 inches• 5/16 to 3/8 inches

04

Must be ordered if
Standoff Adapter
Length Option is not
00.

03

1-11 1/2 NPT (see note [1] below)04

1/2-14 BSP

05

7/8-14 UNF-2A(1) For CA21000 housing, option F mustbe 02. Options 02 and 03 for mounting
threads have more threads thanstandard NPT threads. They havebeen machined to haveapproximately 5 - 7 full threads toincrease mounting strength andstiffness.

One 3/4-14 NPT plug
One 3/4-14 to 1/2-14 NPT
reducer03

As cast without threads

One 3/4-14 NPT plug only

11/19

21000 and 24701 Proximity Probe Housing Assemblies
Datasheet

141600 Rev. W

164818 Compact Proximity Probe
Housing

Recommendation
Order in increments of 0.1 in (3 mm)

164818-AA-BB-CCC-DD-EE-FF-GG

D: Mounting Thread

A: Probe with Connector

01

3/4-14 NPT

00

No probe02

G 3/4 (3/4-14 BSPP)

01

3300 XL NSv probe

03

M24 x 1.5023300 XL 8mm probe

E: O-ring Option

033300 XL 11mm probe

01

Viton

04

3300 8mm ceramic-capped probe

02

Neoprene053300 XL NSv probe with multiple
approvals

03

Ethylene propylene

063300 XL 8mm probe with multiple
approvals

07

3300 XL 11mm probe with multiple
approvals

08

3300 8mm Ceramic Capped Probewith multiple approvals

123300 XL 8mm probe with connector
protector

16

3300 XL 8mm probe with connector
protector, multiple approvals

F: Rear Thread Type2.0 inches

40

4.0 inches

60

6.0 inches

Minimum length 1.6 in (40.6 mm)

292

Maximum length 29.2 in (741.7 mm)

02

M16 x 1.5

03

M20 x 1.505

0.5 meter (20 in)

10

1.0 meter (39 in)Accessories
Part
Number37948-01

C: Sleeve Length016

1/2-14 NPT

G: Probe Cable Length

B: Cap Height
20

01

Description
Probe Support / Oil Seal
Recommended for sleeves
longer than 305 mm (12 in)Individual Probe Sleeve for21000/24701 Proximity Probe
Housings
44382-AAA

Examples

A: Measured Probe Sleeve Length

3.0 in (76.2mm) = 030
22.4 in (569 mm) = 224

Recommendation
Order in increments of 0.1 in (3
mm)

12/19

21000 and 24701 Proximity Probe Housing Assemblies
Datasheet

141600 Rev. W

The individual probe sleeve length does notinclude the distance from the end of the sleeveto the probe tip or the gap from the probe tip to
the target material. If only the part number ofthe original housing is known, and the sleevecannot be measured, use the following table todetermine the sleeve length:
AAA

Description

Standoff adapter
option from original
housing (21000,
CA21000, 24701, orCA24701 option C)
plus

All housing AAA options
except NSv and 11mm
probes (options other thanA:06, A:12, A:26, A:27, A:29,
A:30, A:31, A:32, A:35, or A:36)

Probe penetration
option from original
housing (21000,
CA21000, 24701, orCA24701 option D)
and 045

AAA

Description

Standoff Adapter
Option from original
housing (21000,
CA21000, 24701, orCA24701 option C)
plus

Housing AAA options for
7200 Series 11mm probe
options (A:06 or A:12)

Probe penetration
option from original
housing (21000,
CA21000, 24701, orCA24701 option D)
and 039

ExampleExampleOriginal part number
CA24701 -12-10-30-113-01 02
AAA option for
replacement sleeve (030 +
113+ 039) = 182

Minimum Probe Sleeve Length

Original part number
21000-16-10-15-035-03-02
AAA option for
replacement sleeve (015 +
035 + 045) = 095

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

Standoff Adapter
Option from original
housing (21000,
CA21000, 24701, orCA24701 option C)
plus

Housing AAA options for3300 NSv probe options(A:26, A:27, A:31, or A:32

Probe penetration
option from original
housing (21000,
CA21000, 24701, orCA24701 option D)
and 046

Original part number
24701-31-10-15-090-03-02

All 0.5 meterprobes except NSv
and 11mm probes

18.0 in (457 mm) = 180

AAA option for
replacement sleeve (015 +090+ 046) = 151

3300 XL NSv 0.5
meter probe18.1 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

Original part number
CA24701 -36-10-40-05302-02

3300 XL NSv 1.0
meter probe

33.8 in (859 mm) = 338

AAA option for
replacement sleeve (040 +
053+ 037) = 1303300 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

Standoff Adapter
Option from original
housing (21000,
CA21000, 24701, orCA24701 option C)
plus
Probe penetration
option from original
housing (21000,
CA21000, 24701, orCA24701 option D)
and 037

Maximum Probe Sleeve Length
ExampleHousing AAA options for3300 XL 11mm probe
options (A:29, A:30, A:35,
or A:36)
Example13/19

21000 and 24701 Proximity Probe Housing Assemblies
Datasheet

141600 Rev. W

Individual Standoff Adapter
21003-AAA

To create a probe penetration
length 13 mm (0.5 in), order a
21000 housing with DDD (probe
penetration) option of 030 [76mm (3 in)] and a separate
individual standoff adapter thatis 51 mm (2.0 in) in length (partnumber 21003-020).

A: Individual Standoff Adapter
015

Minimum length 1.5 in(38 mm)075

Maximum length 7.5 in(191 mm)

Recommendation

Order in increments of
0.5 in (13 mm)

Example 2

4.5 in (114 mm) = 045
For desired probe penetration
lengths of less than 25 mm (1.0in), order a separate IndividualStandoff Adapter.
Example 1

The standoff adapter covers 38
mm (2.0 in) of the probe sleeveplus an additional 13 mm (0.5in).
Therefore, the effective probe
penetration length drops to 13
mm (0.5 in).
If you use effective
penetration lengths ofless than 1.0 inches,signal effects are likely
due to probe side viewor rear view of metalcomponents.

The effective probe penetration
length will then be reduced by
the length of the IndividualStandoff Adapter, plus anadditional 13 mm (0.5 in) due to
the NPT thread engagement.

Spare 3300 XL 8mm Reverse Mount
Probe, 3/8-24 UNF threads
330105-02-12-CC-DD-EE
A: Total Length05

0.5 meter (1.6 feet)10

1.0 meter (3.3 feet)15

1.5 meter (4.9 feet)20

2.0 meter (6.6 feet)50

5.0 meter (16.4 feet)90

9.0 meter (29.5 feet)

B: Connector

14/19

00

Connector not installed

02

Miniature ClickLoc coaxial
connector

21000 and 24701 Proximity Probe Housing Assemblies
Datasheet

141600 Rev. W

Agency Approval00

Not required

05

Multiple approvals

330906-02-12-CC-DD-EE
C: Total Length
0.5 meter (1.6 feet)10

1.0 meter (3.3 feet)50

5.0 meter (16.4 feet)70

7.0 meter (23.0 feet)

D: Connector
00

Connector not installed

02

Miniature ClickLoc coaxial
connector

E: Agency Approval00

Not required

05

Multiple approvals

Spare 3300 XL 11mm Reverse Mount
Probe, 3/8-24 UNF threads
330705-02-18-CC-DD-EE
C: Total Length10

0.5 meter (1.6 feet)50

5.0 meter (16.4 feet)90

9.0 meter (29.5 feet)

Without connector

02With miniature male coaxial
connector

E: Agency Approval

Spare 3300 NSv Reverse Mount
Probe, 3/8-24 UNF threads

05

00

D: Connector

15/19

00

Not required

05

Multiple approvals

21000 and 24701 Proximity Probe Housing Assemblies
Datasheet

141600 Rev. W

Graphs and Figures

Probe
Cable
LengthMaximum(C) + (D)with visible
probe(P/N andS/N)

Maximum (C) + (D)Dimension

12 in

Not visible

5.0 in (12.7 cm)

18 in

4.0 in (10.1cm)

10.5 in (26.6 cm)

24 in

9.7 in (24.6cm)

16.1 in (40.9 cm)

30 in

15.4 in (39.1
cm)

21.7 in (51.1 cmm)

36 in

21.1 in (53.6cm)

27.3 in (69.3 cm)

0.5 m

Not visible

13.5 in (34.3 cm)

1.0 m

17.0 in (43.18cm)

32.9 in (83.5 cm)

Figure 1: 21000/CA21000 Proximity Probe Housing Assembly
Dimensions are in millimeters (inches).

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21000 and 24701 Proximity Probe Housing Assemblies
Datasheet

141600 Rev. W

24701/CA24701 Dimensions

Probe
Cable
LengthMaximum (C) +(D)
Maximum (C) +with visible probe (D) Dimension(P/N and S/N)

12 in

Not visible

5.0 in (12.7 mm)

18 in

4.0 in (10.1 cm)

10.5 in (26.6
mm)

24 in

9.7 in (24.6 cm)

16.1 in (40.9 mm)

30 in

15.4 in (39.1 mm)

21.7 in (51.1 mm)

36 in

21.1 in (53.6 mm)

27.3 in (69.3
mm)

0.5 m

Not visible

13.5 in (34.3
mm)

1.0 m

17.0 in (43.18 mm)

29.2 in (74.2mm)

Figure 2: 24701/CA24701 Proximity Probe Housing Assembly
Dimensions are in millimeters (inches).

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21000 and 24701 Proximity Probe Housing Assemblies
Datasheet

141600 Rev. W

TablesTable 1: For Figure 1, Dimensions in mm (inches).
Catalog Number

Dimension
A

B

C and DE

21000

83.3 (3.28)

161.6 (6.36)

See Ordering Option C & D

26.7 (1.05)

24701

78.2 (3.08)

151.9 (5.97)

See Ordering Option C & D

27.9 (1.10)

Table 2: Maximum Length of C and D Dimension for Proximity Probes
Probe Cable Length

Maximum C and D Dimension

0.5 meter (3300 Series)

343 mm (13.5 in)

1.0 meter

742 mm (29.2 in)Table 3: Maximum C and Dimension with Standard P/N and S/N Label (non-flag label)
Probe Cable Length

Maximum C and D Dimension

0.5 meter

Not visible

1.0 meter

432 mm (17 m)

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21000 and 24701 Proximity Probe Housing Assemblies
Datasheet

141600 Rev. W

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