Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Model | 330104-01-05-50-02-02 |
| Probe Diameter | 11mm (0.43 in) |
| Thread Type | M10 x 1 Metric |
| Cable Type | Armored (Metal Sheath) |
| Linear Range | 4mm (180 mils) |
| Sensitivity | 3.94 V/mm (100 mV/mil) |
| Max Temp (Probe) | 177°C (350°F) |
| Frequency Response | 0 to 10 kHz |
| Supply Voltage | -24 VDC (Nominal) |
| Compliance | API 670, ATEX / IECEx |
Product Introduction
I’ve pulled too many melted probes out of compressor housings because someone thought a standard plastic cable could handle a turbine exhaust. The 330104-01-05-50-02-02 is the armored version for a reason. That metal sheath isn’t just for looks; it’s your insurance policy against oil leaks, hot spots, and someone accidentally kicking the cable during maintenance. It uses the standard 11mm tip, so you get that solid 4mm linear range without worrying about the cable failing first.The M10x1 thread is standard for most imported turbines and compressors, but don’t assume your old probe was M10 just because it looked similar. I’ve seen guys force an M8 into an M10 hole and strip the casing. This probe delivers a clean 3.94 V/mm signal that plays nice with 3300 XL and 3500 systems. Just remember: the armor makes it stiffer. Don’t bend it at a 90-degree angle right at the connector or you’ll kink the internal coax. Give it a gentle radius.
Quality SOP & Tech Pitfalls
The Lab Report:
Eddy current probes are passive, but that doesn’t mean they can’t be trash. Every 330104-01-05-50-02-02 gets checked:
- Visual Inspection: Check the armor for kinks, dents, or crushed sections. Inspect the M10 threads for burrs.
- DC Resistance: Fluke 115 across center pin to shield. Should be ~7.5-9.8Ω depending on length. Open circuit = dead.
- Insulation Test: Megger at 500V between shield and ground. Must be >500 MΩ. Oil in the cable = instant fail.
- Tip Check: Microscope inspection of the sensing face. No scratches, no pitting, no epoxy cracks.
- Seal: Anti-static bag, sealed immediately.
The Engineer’s Warning:
The biggest lie in the field is “It’s just a wire, it can’t be wrong.” Wrong. I’ve seen a plant shut down for 12 hours because a tech swapped a 330104-01-05-50-02-02 with a non-armored 330103 in a high-vibration area. The plastic cable rubbed through in 3 days, shorted to ground, and tripped the 3500 rack. Also, check the extension cable length. The probe + extension must match the pre-calibration length of the proximitors. If you mix and match lengths, your gap voltage will be off, and you’ll spend 4 hours chasing a “sensor fault” that’s actually just bad math.
Installation & Configuration Guide
- Pre-Installation: ⚠️ LOCKOUT/TAGOUT. Verify zero rotation. Take a photo of the old probe’s routing and the gap voltage on the proximitors. Clean the M10 mounting hole with compressed air; metal shavings here will kill your signal.
- Removal: Use a proper 11mm wrench. Don’t use pliers on the armor; you’ll crush the shield and create a ground loop. If it’s seized, use penetrating oil, not brute force.
- Installation: Hand-thread the 330104-01-05-50-02-02 first to avoid cross-threading. Torque to 1.7-2.3 N·m. DO NOT OVER-TORQUE. You’ll crack the internal ceramic insulator.
- Power-On & Testing: Power up the proximitors. Adjust the gap until the output is -10.0 VDC ±0.2V (midpoint of linear range). Lock the jam nut while watching the voltage. If it drifts >0.5V when you tighten, loosen and retry.
Compatible Replacement Models
| Model | Compatibility Tier | Notes |
|---|---|---|
| 330104-01-05-50-02-02 | ✅ Drop-in Replacement | Identical specs. No gap adjustment needed if same length. |
| 330104-01-05-50-02-00 | ⚠️ Software Compatible | Same probe, different approval suffix. Electrically identical. Re-gap required. |
| 330103-00-05-50-02-02 | ❌ Hardware Mod Required | Non-armored version. DO NOT USE in high-temp or high-abrasion zones. |
Frequently Asked Questions (FAQ)
Can I cut the cable to length in the field?
Absolutely not. The 330104-01-05-50-02-02 is factory-calibrated as a complete system (probe + cable). Cut it, and you change the capacitance. Your sensitivity will drift, and the 3500 monitor will throw errors. Buy the correct length.Is this probe compatible with 3300 XL 8mm proximitors?
No. The 11mm probe has different sensitivity (3.94 V/mm) compared to 8mm (7.87 V/mm). If you plug this into an 8mm proximitors, the gap voltage will be way off scale. Match the probe diameter to the proximitors.What’s the max temperature for the armor?
The stainless steel armor can handle 300°C+, but the internal insulation and epoxy are rated to 177°C. If your housing runs hotter than 177°C, you need the ETR (Extended Temperature Range) version, not this standard 330104-01-05-50-02-02.Can I use Teflon tape on the M10 threads?
Use PTFE tape, but only 1-2 wraps. Don’t cover the first thread. If tape shreds get into the gap, they’ll show up as high-frequency noise in your vibration spectrum. Better yet, use a high-temp anti-seize compound rated for instrumentation.Why is my gap voltage drifting after installation?
Thermal expansion. If you set the gap at 20°C and the machine runs at 100°C, the shaft grows. Always set the gap at cold conditions. The 3500 system will compensate for thermal growth. If it drifts while cold, your jam nut is loose or the mounting hole is wallowed out.Is the armor grounded?
Yes, the armor is typically grounded at the proximitors end. Do not ground it at the probe end. Grounding at both ends creates a ground loop that picks up 50/60Hz hum. Check your installation manual; single-point grounding is mandatory.
