User`s manual
ProScale M150, M250 with LCD Digital Displays  Page 7 of 48 
Product Specifications 
Measuring Range*: 
Model 150:   2 Standard Sizes: 
  0-250mm (10in)  and 0-450mm (18in)  
Model 250:   7 Standard Sizes:   
  0 to 300mm, 600mm, 1.3m, 2.4m, 3.0m, 3.6m, 6.0m 
  (0 to 12in, 24in, 52in, 96in, 120in, 144in, 240in) 
Accuracy:  + (.025 + .064 x L / 430) mm;   
  max error + 0.20mm @ 1.3 to 6m 
+ (.001 + .0025 x L / 17) in;   
max error + .008in @ 4 to 20 feet 
(L = length of measurement in mm or inches) 
Resolution  Reduced:  .1mm/.01cm/.01in;   
  Normal:    .01mm/.001cm/.001in;   
  Increased:  .01mm/.001cm/.0004in 
Repeatability:  .01mm  or .001cm  or .001in  
Display Range:  + 9999.99 mm; + 999.999 cm; + 999.999 in;   
  + 399 63/64 in 
Operating Temp:  0 to 50°C;  32 to 120°F 
Temp Coef:  25ppm/°C; 13ppm/ °F 
Max. Slew Rate:  400 mm/sec. (15 inches/sec.) 
Accessories:  See Section 6 
Output Format:   Mitutoyo Digimatic® SPC 
ReadHead:    3m (10’), six-conductor cable terminated by RJ12 
    connector. (Maximum cable length 6m) 
Dimensions:    Available at www.proscale.com. 
US Patents:  4420754, 4879508, 4878013, 4959615 
Warranty:  Three years from date of purchase. 
All ProScale products are MADE IN USA 
* MEASUREMENT range is approximately 100mm (4in) shorter than PHYSICAL 
lengths. 










