21000-16-05-00-135-03-02 | Bently Nevada 3300 XL 8 mm Probe

The Bently Nevada 21000-16-05-00-135-03-02 is a Probe Option for industrial control and automation applications.

Bently Nevada 21000-16-05-00-135-03-02 is a proximity probe housing assembly built for 3300 XL 8 mm probes. It combines a 13.5 in probe penetration with a 0.5 m probe cable length, so engineers can mount the probe at the correct depth while keeping the cable run short and protected.

What does the 21000-16-05-00-135-03-02 housing include?

This assembly is a complete mounting package. It consists of a dome cover that screws into the housing body, threaded ports for conduit connections, a probe sleeve, O-rings, a reverse mount proximity probe, a thread seal, and optional conduit fittings. The aluminum body with 304 stainless steel sleeve keeps the assembly rigid and corrosion resistant in typical plant environments.

The fitting option delivers 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 sizes from 1/8 to 3/8 inches. The mounting thread is 3/4-14 NPT, which is required when no standoff adapter is ordered.

How does this housing support reliable vibration monitoring?

Reliability engineers choose a housing assembly to protect the probe and cable from mechanical damage, moisture, and incidental contact. The 13.5 in penetration sets the probe tip at the correct position relative to the machine casing. Meanwhile, the 0.5 m cable length reduces the exposed cable run between probe and extension cable.

The 21000 housing is certified as a CSA Type 4 enclosure and is fully compliant with API 670 for externally mounted proximity probe housings. CSA-approved versions are rated explosion proof for hazardous areas, and intrinsically safe probe options are available for these aluminum housings. These ratings matter when the probe must sit close to a gas turbine, compressor, or pump in a classified area.

Which applications suit the 21000 probe housing?

Use this assembly on rotating machinery where a 3300 XL 8 mm probe needs a protected, sealed mounting point. Typical examples include steam turbines, centrifugal compressors, and large motors. The reverse mount probe and threaded conduit ports simplify cable routing on skids and baseplates. Because the housing is CSA Type 4 and API 670 compliant, it fits projects that specify those standards for externally mounted probes.

What should buyers verify before ordering?

Confirm the probe type, cable length, penetration depth, and fitting option against the machine drawing. Check that the 3/4-14 NPT mounting thread matches the casing port. Also verify whether a standoff adapter is needed, because this model has none. TenBN supplies genuine Bently Nevada original spare parts and can confirm current lifecycle status and availability before you commit.