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The SR100 shown below has been discontinued. The new replacement model is the SR160 model.

Many of the SR100 units in the field still have life in them but need repaired,our repair department can handle your repairs.



The SR100 portable surface roughness tester is powerful, accurate and easy to use.


 With the SR100, you can measure roughness almost anywhere. It is ideal for checking large components, structures, auditing batch production prior to shipment and production line process control.


Separates into Two Pieces


The innovative SR100 separates into two pieces to measure surface roughness. The bottom half contains the traverse mechanism and stylus pick up assembly. This is placed on the surface to be measured. It has a wide base to ensure stability.

The upper half includes the large LCD display, start button, mode and parameter buttons, comfortably  hand held for easy operation and clear viewing.


How it does it 


A diamond stylus is drawn across the part. The motorized traverse mechanism is cam driven to ensure that the correct horizontal distance is traveled.

Vertical movement of the stylus as it travels across peaks and valleys is detected by a piezo-electric pick up which converts mechanical movement into an electrical signal.

The electrical signal is digitized and sent to a microprocessor where the parameters are instantly calculated using standardized algorithms.


















*Large LCD window


*Measures Ra at the touch of a button


*In addition to basic roughness parameter Ra and Rz, also measures advanced Rp, Rv, and Rt parameters


*five second cycle time


*Result saved until the next measurement is taken


*Switches between inch and metric mode without remeasuring


*Use right out of the box-little or no operator training required


*Automatic shut-off after five minutes of inactivity


*Configured with the most common industrial settings to ensure correlation between multiple operators (see specifications)


*Simple and reliable calibration routine


*Uses standard off-the shelf calculator type batteries with a minimum life of 5,000 measurements


*Includes SR100 two-piece assembly, calibration standard, batteries, operation guide and a carrying case






















































































Starrett SR100 Surface Roughness Tester


Starrett SR100
SR100 blue tooth
Untitled 1
Technical Specifications  
Gauge range200µm (0.008in)
Accuracy5% of reading + 0.1µm (4µin)
Pick up typePiezoelectric
Gauge force.007 oz.
StylusDiamond, Radius 5µm (200µin)
Cut off value0.03in + 15%
Traverse length5mm (0.2in)
Traverse speed0.08in/sec
Display unitµm / µin
Battery life5,000 operations minimum
Parameter Results  
Code 112/3115-01Ra, Rz, Rv, Rp, Rt
Ra 40µm (1600µin)0.01µm (0.4µin)
Rz, Rv, Rp, Rt199µm (7800µin)0.1µm (4µin)
Overall dimensions4.92x3.15x1.5in
Component Dimensions an Conditions  
Min bore65mm (2.6in)
Min diameter25mm (1.0in)
Max temperature35°C (95°F)
Nominal Operating Conditions  
Temperature20°C (68°F)
Humidity0 to 80% non condensing
Storage Conditions  
Temperature0 to 50°C  (32°F to 122°F)
Humidity0 to 80% non condensing

SR100 Surface Roughness Tester & Accessories

Cat. No.              EDP

SR100                        20950    SR100 two-piece surface roughness tester assembly,

                                     calibration standard, batteries, operation guide and a

                                     carrying case.


724-368-8006  *  Fax 724-368-8005


Starrett SR100