K25525 Soot Levels in Diesel Engine Oils, Portable Meter


Test Method
Measures the amount of suspended carbon (soot) in diesel engine lubricating oils.

Features and Benefits
• Portable operation

• Measures soot levels as high as 10% and higher



K25525 Soot Levels in Diesel Engine Oils, Portable Meter
The Portable Soot Meter is a hand-held, battery operated diagnostic tool that measures soot concentration levels in diesel engine lubricating oil up to 10% and higher – without sample preparation or solvents. It has been specifically designed for fleet operators, transit authorities, service stations, construction sites, preventative maintenance personnel, or anyone that needs easy, on-site soot measurements to enable them to know exactly when to change the lubricating oil. It is based on the same field-proven infrared technology that is utilized in the K25500 Soot Meter. Measurement results are shown on digital display in less than one minute. Wipe the sensor clean with absorbent paper towel, and the unit is ready to apply the next used oil sample. The Portable Soot Meter weighs less than 2 lbs. and is powered by four replaceable “AA” batteries providing power for approximately 1000 tests. It is factory calibrated to measure soot levels as high as 10% or higher with an accuracy of within 0.5%.

A laboratory model soot meter is also available (K25500).


Measurement Range: 0 to 10% soot

Measurement Principle: Field Proven Horizontal Attenuated Total Reflectance (HATR) Mid-IR Analysis

Measurement Time: Less Than One Minute Per Analysis

Sampling Procedure: Cover sensor surface with used oil sample from dipstick or sample cup and push “Run” button.

Operating Temperature Range: 40 to 110F (4 to 45C)

Output Resolution: 0 -10% soot in 0.5% increments up to 10%. Above 10%, soot in 1% increments.

Non-Volatile Memory: For calibration constants and configuration data

Electrical Requirements
Four (4) “AA” Batteries

Dimensions lxwxh,in.(cm)
7x4x1.75 (2.75x1.6x0.7)
Net Weight: 2 lbs (0.9kg)

Shipping Information
Shipping Weight: 6 lbs (2.7kg)
Dimensions: 1 Cu. ft.

Ordering Information



Product Description


Portable Soot Meter