Products and Innovations

Grease Thief

Grease Thief device captures the most recently purged grease within the body and protects it from contamination by environmental contaminants.

The consistency of grease plays a critical role in its function as a lubricant. Most consistency measurement methods are designed for use with newly manufactured greases where there is no constraint on the quantity available. The Grease Thief sampling and analysis system overcomes these grease sampling and analysis obstacles by providing a reliable and cost-effective grease analysis solution with as little as one gram of grease.

The Grease Thief Sampling Kits Are available for the following applications:

Check Out Grease Thief Store For more

Pick‑Pocket Solution

-Precision Sampling-
Minimal Volume | Maximum Insight

Key Features:

  • Samples from openings as small as ¼ inch, accessing grease from the active bearing zone.
  • Only ~1 – 1.5 grams of grease needed, preserving equipment lubrication and reducing material waste.
  • Eliminates the need for cutting tubes or transferring grease manually—cleaner, faster, and repeatable.
  • Built‑in piston allows direct transfer to Grease Thief, GT Colorimeter, or FTIR sample window.
  • Fully compatible with ASTM D7918 and automated screening tools like FerroQ.
  • Reduces single-use plastic by up to 60% and lowers kit costs by up to 80%.

GT Colorimeter 3.1

Portable. Bluetooth-enabled. Multi-Function.

The GT Colorimeter is a compact, battery-powered instrument that delivers precise and repeatable grease color measurements under controlled lighting and pathlength conditions.

Key Features:

  • Four precision spacers (0.000, 0.005, 0.010, and 0.035 inch) to measure greases of varying opacity.
  • Color comparison to new grease reference standards for condition monitoring.
  • QC Mode for manufacturing: target color definition, batch evaluation, and trend analysis.
  • Advanced 3.1 version supports L*, a*, b* color metrics and liquid sample testing (oils, coolants).
  • ASTM-compliant lighting for tests such as ASTM D1500 and D7843 (MPC).
  • Bluetooth connectivity with tablet app for viewing, logging, and cloud-syncing results.

Includes: Touchscreen tablet, charging cable, spacers…

Grease Thief Ferro-Q

Fast. Accurate. Easy to Use.

The FerroQ enables on-the-spot ferrous debris measurement in grease samples extracted using the Grease Thief sampler (ASTM D7718).

  • Results in under 10 seconds.
  • Automatic range selection for low to high ferrous levels (up to 200,000 ppm).
  • Bluetooth or USB data transfer to mobile devices or laptops.
  • Battery or 12VDC powered for field flexibility.
  • Calibration with certified Grease Thief standards ensures accuracy.

Grease Thief PocketLab 1.1

PocketLab 1.1 contains two instruments, the FerroQ for wear detection, and the GT Colorimeter for color spectral analysis at fixed pathlength.  Together they provide insight into steel bearing and gear surface wear quantity, degradation of greases, contamination of greases, and mixing.

Grease Thief PocketLab 2.1

PocketLab 2.1 adds a third instrument, the GTA Mini-1.1, which creates a thin-film deposition of the grease sample from a Grease Thief Sampler and the Die Extrusion method, and provides comparison feedback on the consistency changes of the grease relative to new grease.  The thin-film grease layer is presented in substrate sections, each holding ~0.25g grease for testing in RULER, elemental spectrometers, FTIR, and Analytical Ferrography.

STEM THIEF

Relubricate MOV stems Quickly, Safely, and On-line —while capturing in‑service grease for advanced analysis.

Designed in 2013, the StemThief™ provides a more efficient, safer, and cost-effective method to stem relubrication. The device was created in response to the NRC information notice 2010-03 due to STEM lubrication issues. This innovative addition provides lubrication for more effective lube film restoration. This reduces relubrication time with the ability to gain valuable insights on equipment condition through grease analysis.

View Case Study Here. 

Check out stemthief.com for more information.

Go to STEM THIEF Website

Grease Thief Products Are Applicable Towards:

  • Pharmaceutical manufacturing and research
  • Robots (Automotive applications, manufacturing)
  • Wind turbine samples (main, blade, generator, etc.)
  • Electric motors (purge points)
  • Motor Operated Valves (Nuclear, coal & petro-chemical)
  • Marine applications
  • Military (for helicopters to evaluate intervals and maintain flight safety)
  • Food-Grade lubricant management
  • New grease quality control