Configured for external mounting and environmental protection of proximity probes in rotating machinery monitoring systems, the Bently Nevada 21000-16-05-00-067-04-02 (21000 Proximity Probe Housing) provides direct physical execution of mechanical containment and adjustment.

Option Code Breakdown

• 21000: Base Model Number for blanking/explosion-proof proximity probe housing.

• -16: Probe threaded field option, configured for 3/8-24 UNF thread profiles.

• -05: Unthreaded housing length option, specified as 0.5 in.

• -00: Threaded housing length option, specified in 0.5 in increments (0.0 in selected).

• -067: Total explosion-proof sleeve length, option code 067.

• -04: O-ring seal material option, Viton compound specification.

• -02: Hazardous area certification, multi-agency explosion-proof approval option.

Physical and Mechanical Data

Gap Voltage Validation and Rotor Dynamics Setup

The 21000 Series housing provides the mechanical sliding mechanism required to adjust the internal eddy-current probe relative to the target shaft surface. During rotor dynamics calibration, fine physical positioning via this housing is required to achieve the necessary gap voltage validation (-10 VDC targets) on the Proximitor loop output. Proper locking sleeve engagement ensures the internal probe maintains its calibrated distance under dynamic axial loads, suppressing mechanical drift that directly interferes with accurate eddy-current probe scaling and vibration measurement tracking.

Kit Inventory and Components

• One (1) 21000 Series explosion-proof proximity probe housing assembly.

• One (1) Internal probe adjustment sleeve with Viton O-ring seals.

• Two (2) High-tensile locking hex nuts for mechanical positioning.

• One (1) Threaded conduit blanking plug.

Installation and Shielding Directives

Mechanical integration requires a minimum of 5 full thread engagement rounds for the NPT conduit junction to comply with explosion-proof and flameproof enclosure directives. Adjust the insertion depth of the internal sleeve using a digital multimeter reading the probe's signal wire output until a stable static target of -10 VDC is reached. Ensure all transducer cable routing within the enclosure maintains independent paths to prevent insulation wear, and execute a single-point connection for external cable shields at the monitoring instrumentation rack terminal block to block stray ground currents.

Shipping and Logistic Standards

Delivery time: 2-7 days when payment finish, routed via DHL/FEDEX/UPS courier networks. Units are packed exclusively in specialized anti-static industrial packaging containing desiccant packets and multi-layered, impact-absorbent molded polyethylene foam inserts to protect fine precision threads and structural sealing surfaces.

Technical Engineering FAQ

Q: Does this passive housing draw any power from the monitoring backplane or loop?

A: No. The housing is entirely passive and mechanical, drawing no current from the instrumentation backplane or Proximitor sensor circuit.

Q: Can the internal probe be adjusted or replaced while the machine is running?

A: Yes. The external configuration of the 21000 housing allows field engineers to loosen the locking nuts and adjust or replace the internal proximity probe without exposing personnel to rotating elements or shutting down process machinery.

Q: What action must be taken if the Viton O-rings degrade?

A: The Viton O-rings must be replaced immediately with identical material specifications to retain the environmental sealing rating and prevent high-pressure process gases or moisture from penetrating the housing assembly.