Product Introduction
The 24701-28-05-20-027-01-02 is a proximity probe housing assembly from Bently Nevada. This unit pairs an approval-rated 3300 XL 8mm probe with a rugged stainless steel housing. Specifically, it shields the probe from dust, water, and impact on turbines, compressors, and large motors. Therefore, maintenance teams obtain stable vibration and Keyphasor signals with fewer field interventions.
Technical Specifications
This assembly carries a 3300 XL 8mm probe with the approval option and a 0.5 m (20 in) probe cable. The probe penetration depth measures 2.7 inches, and the standoff adapter adds 2.0 inches of clearance. Additionally, the mounting thread is a 3/4-14 NPT connection, which is required whenever a standoff adapter is fitted.
The fittings option supplies one 3/4-14 NPT explosion-proof fitting and one 3/4-14 NPT plug. Moreover, the maximum combined (C) + (D) dimension reaches 13.5 in (34.3 mm). The probe part number and serial number remain hidden after installation, which protects traceability data in exposed locations.
The housing body uses 303 stainless steel, while the probe sleeve uses 304 stainless steel. Each assembly consists of a dome cover that screws into the housing body, threaded conduit ports, the probe sleeve, O-rings, the reverse mount probe, a thread seal, and the optional conduit fittings and standoff adapter.
Mechanical and Environmental Parameters
The 24701-28-05-20-027-01-02 relies on its stainless steel body to resist corrosion, washdown, and mechanical shock. The dome cover threads firmly into the body and stays serviceable during probe replacement. Meanwhile, the O-rings block moisture and dust from the internal cavity.
With the 2.0-inch standoff adapter installed, the probe clears thick casings and thermal insulation. The 2.7-inch penetration suits standard mounting depths, while the 0.5-meter cable keeps routing compact inside junction boxes. Furthermore, the explosion-proof fitting supports conduit runs in classified areas. The typical weight is 1.8 kg (4.1 lb) without fittings.
Installation Guide
First, confirm the machine port matches the 3/4-14 NPT mounting thread. Next, fit the standoff adapter and thread seal, then insert the probe sleeve to the required depth. After that, attach the explosion-proof fitting and route the cable through the conduit port. Then, screw the dome cover onto the housing body. Finally, connect the probe to the extension cable and verify gap voltage before startup.
Packaging List
24701-28-05-20-027-01-02 housing assembly (1 unit)
Approved 3300 XL 8mm reverse mount probe with 0.5 m cable (pre-installed)
2.0 in standoff adapter
3/4-14 NPT explosion-proof fitting
3/4-14 NPT plug
O-ring and thread seal set
Protective shipping carton
FAQ
Q1: What probe does this assembly include?
A: The 24701-28-05-20-027-01-02 includes an approval-rated 3300 XL 8mm reverse mount probe with a 0.5-meter cable.
Q2: What is the probe penetration depth?
A: This configuration provides a 2.7-inch probe penetration depth plus a 2.0-inch standoff adapter.
Q3: Are the probe serial numbers visible after installation?
A: No. The probe P/N and S/N stay hidden once the housing is mounted.
Q4: What material is the housing body?
A: The body uses 303 stainless steel, and the sleeve uses 304 stainless steel for corrosion resistance.
Q5: What shipping methods do you offer?
A: We ship via Fedex, UPS, and DHL. Orders usually dispatch within 3 to 5 business days after payment confirmation.
