24701-28-05-05-105-03-02 Proximity Probe Housing Assembly – Bently Nevada

Parameter

Specification

Model Number

24701-28-05-05-105-03-02

Brand / Series

Bently Nevada 24701 Proximity Probe Housing Assembly

Housing Material

303 stainless steel body with 304 stainless steel sleeve

Probe Option (A)

28 – 3300 XL 8mm probe with selectable hazardous area approvals

Probe Cable Length (B)

05 – 0.5 meter (20 inches)

Standoff Adapter (C)

05 – 2.5 inches (64 mm) *(minimum: 1.5 in / maximum: 7.5 in, ordered in 0.5 in increments)*

Probe Penetration (D)

105 – 10.5 inches (267 mm) (minimum: 1.0 in, ordered in 0.1 in increments)

Fittings Option (E)

03 – One 3/4-14 NPT plug + one 3/4-14 to 1/2-14 NPT reducer + cable seal grip

Mounting Thread (F)

02 – 3/4-14 NPT (required when standoff adapter is ordered)

Housing Weight

1.8 kg (4.1 lb) typical without fittings

Enclosure Rating

CSA Type 4; Explosion-proof for hazardous areas

Operating Temperature

-50°C to +80°C (T4) / -50°C to +40°C (T5)

What does the part number 24701-28-05-05-105-03-02 represent?

This is a 24701 stainless steel housing assembly. Each segment defines a specific option:
24701: Base model – stainless steel body with 304 stainless steel sleeve
28: Probe option – 3300 XL 8mm probe with selectable hazardous area approvals
05: Probe cable length – 0.5 meter (20 inches)
05: Standoff adapter (C) – 2.5 inches (64 mm)
105: Probe penetration (D) – 10.5 inches (267 mm)
03: Fittings option – 3/4-14 NPT plug + reducer to 1/2-14 NPT + cable seal grip
02: Mounting thread – 3/4-14 NPT

What is the difference between the 24701 and 21000 housing series?

The primary difference is material. The 24701 features a 303 stainless steel body, providing superior corrosion resistance for harsh chemical, marine, and offshore environments. The 21000 uses an aluminum body, which is lighter and suitable for general-purpose applications. Both are available with explosion-proof certifications.

Is this housing assembly explosion-proof?

Yes, when ordered with explosion-proof fittings (E:01, E:02, or E:04) and the CA-certified version of the housing, it is CSA-rated as explosion-proof for Class I, Division 1 and 2 hazardous locations. The specific model 24701-28-05-05-105-03-02 includes fittings option 03, which is compatible with explosion-proof installations when combined with the appropriate certification.

What is the maximum probe penetration (C + D) for this housing?

For a 0.5 meter probe cable length (as configured in this model), the maximum combined C + D dimension is 343 mm (13.5 inches) . If the required penetration exceeds 12 inches (305 mm), additional sleeve support (such as part number 37948-01) is recommended to prevent resonance.

Can I use this housing with 3300 XL NSv or 3300 XL 11mm probes?

Yes. The 24701 housing accepts various probe types. Option A:26, 27, 31, 32 are for 3300 XL NSv probes; options A:29, 30, 35, 36 are for 3300 XL 11mm probes. The specific option “28” in this model indicates a 3300 XL 8mm probe with selectable approvals.