Key Technical Specifications
| Parameter | Specification |
|---|---|
| Probe Type | 3300 XL 8 mm reverse-mount proximity probe |
| Thread | 3/8-24 UNF |
| Total Length | 0.5 m (1.6 ft) |
| Connector | Mini ClickLoc coaxial |
| Cable Type | Standard (non-FluidLoc) |
| System Compatibility | 3300 XL 8 mm Proximitor sensor and extension cable |
| Linear Range (8 mm system) | 2 mm (80 mils) |
| Sensitivity (8 mm system) | 7.87 V/mm (200 mV/mil) |
| Storage Temperature | -51 °C to +177 °C (-60 °F to +351 °F) |
| Approvals | CSA, ATEX, IECEx (multi-approval) |
| Armor Option | Not available for reverse-mount probes |
| Standard Compliance | API 670 4th Edition (5 m system) |
Product Introduction
You do not buy a proximity probe because the brochure looks clean. You buy it because the turbine is running, the vibration channel is drifting, and nobody wants to shut down until the replacement is proven. The 330105-02-12-05-05 is a reverse-mount 3300 XL 8 mm probe. That means the sensing face points back through the mounting hole instead of sticking out in front of it. It is used where space is tight or where the probe must be installed from the backside of a bracket or bearing housing.Engineers keep the 3300 XL family around because the components are interchangeable. You do not need to bench-match a probe, cable, and Proximitor sensor if they are all 3300 XL 8 mm parts. The 0.5 m length here is short, so this probe is usually part of a compact assembly or a fixed-distance installation. The ClickLoc connector helps, but it also means you cannot force it. I have seen good channels killed by a half-seated connector and a layer of oil.
Quality SOP & Tech Pitfalls
The Lab Report (SOP)
- Visual inspection: Check probe body, threads, connector pins, cable jacket, and nameplate markings.
- Connector check: Inspect the Mini ClickLoc coaxial connector for bent pins, corrosion, or loose coupling.
- Continuity and insulation test: Verify center conductor continuity and shield-to-conductor insulation with a Fluke 115 or equivalent.
- Impedance check: Measure probe coil resistance and compare against expected 3300 XL values.
- Live test with Proximitor: Connect to a 3300 XL Proximitor sensor and verify gap voltage response across the linear range.
- Documentation: Record part number, length code, connector type, approval codes, and test results.
- Packing: Anti-static bag, desiccant, and protected shipping to prevent connector damage.
The Engineer’s Warning (Pitfalls)Do not assume “05” means a 5 m cable. In this part number, the “05” in the length position means 0.5 m. I have watched a tech order what he thought was a full-length probe, arrive on site with a stub cable, and lose half a shift. Also, reverse-mount probes do not come with armor. If the original was armored, you are not looking at the same mechanical build. Check the full suffix before you pull the old probe.
Installation & Configuration Guide
- Pre-Installation
- ⚠️ Lock out power to the monitor frame and verify the channel is bypassed or disabled.
- Photograph the existing probe orientation, gap setting, connector routing, and Proximitor output voltage.
- Confirm the new probe matches the old suffix: 330105-02-12-05-02-05.
- Removal
- Disconnect the ClickLoc connector carefully; do not pull on the cable.
- Loosen the locknut and remove the probe.
- Inspect the mounting hole for debris, damaged threads, or oil ingress.
- Installation
- Set the mechanical gap to the OEM recommended value for the 3300 XL 8 mm system, typically 1.27 mm (50 mils), unless the machine specification states otherwise.
- Thread the probe in smoothly; do not cross-thread.
- Tighten the locknut and verify the probe does not rotate under vibration.
- Reconnect the ClickLoc connector until it seats firmly.
- Power-On & Testing
- Restore -24 V DC power to the Proximitor sensor.
- Verify the Proximitor gap voltage is near the mid-range value, typically around -10 V DC for an 8 mm system.
- Check the monitor channel for stable readings, correct scaling, and no fault flags.
- Compare against the baseline vibration and position values before returning the machine to service.
Compatible Replacement Models
| Compatibility | Model | Notes |
|---|---|---|
| ✅ Drop-in Replacement | 330105-02-12-05-02-05 | Same reverse-mount, 0.5 m, ClickLoc, standard cable, multi-approval. |
| ⚠️ Software Compatible | 330105-02-12-05-02-00 | Same length and connector, but without CSA/ATEX/IECEx approvals. Verify hazardous-area requirements. |
| ⚠️ Software Compatible | 330105-02-12-10-02-05 | Same family, but 1.0 m length. Only acceptable if cable routing allows. |
| ❌ Hardware Mod Required | 330106-xx-xx-xx-xx-xx | M10×1 thread family. Different mechanical fit; not a direct swap for 3/8-24 UNF. |
Frequently Asked Questions (FAQ)
What does “reverse-mount” mean here?
The probe senses through the back of the mounting hole. It is used where a normal forward-facing probe cannot fit or where the bracket design requires rear installation.Is 330105-02-12-05-02-05 a 5 m probe?
No. The “05” in this suffix means 0.5 m total length. A 5 m system would use a different length code and usually includes an extension cable.Can I mix this probe with older 3300 parts?
3300 XL 8 mm probes, extension cables, and Proximitor sensors are interchangeable within the 3300 XL family. Mixing with non-XL 3300 parts may work in some cases, but you should verify compatibility with the OEM documentation before doing it on a protected machine.Does this probe need armor?
Reverse-mount 330105 probes are not offered with armor. If your original probe was armored, confirm the mechanical arrangement before replacing it.What gap should I set during installation?
For the 3300 XL 8 mm system, the typical recommended gap is 1.27 mm (50 mils). Always confirm against the machine-specific procedure and the Proximitor output voltage.Can I use this in a hazardous area?
The “-05” approval suffix indicates CSA, ATEX, and IECEx multi-approval. Still verify the exact certificate, temperature class, and zone rating before installing it in a classified area.What warranty is reasonable for surplus stock?
A 12-month warranty is fair if the supplier performs visual inspection, connector testing, coil resistance checks, and a live Proximitor test before shipment.
