User`s manual
ProScale M150, M250 and all products with General Purpose LCD Digital Displays  12 of 44 
Product Specifications 
ProScale Model 150 & Model 250 
Measuring Range*: 
Model 150:     2 Standard Sizes: 
    0-250mm (10in) and  0-450mm (18in)
Model 250:     9 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  .1mm/.01cm/.01in; .01mm/.001cm/.001in;  .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 51°C; 32 to 120°F 
Temp Coef:  25ppm/°C; 13ppm/ °F 
Max. Slew Rate:  400 mm/sec. (15 inches/sec.) 
Available Displays: General Purpose Surface Mount LCD 
(Digital Readouts)  General Purpose 1/4 DIN Panel Mount LCD 
    1/8 DIN Panel Mount LED 
    1/4 DIN Panel Mount Position Control LCD 
    Dual Input Panel Mount  LCD 
Accessories:    See Section 6 
Output Format:   Mitutoyo SPC, RS232, RS485 (Selected displays) 
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 lengths are approximately 100mm (4in) shorter than PHYSICAL lengths. 










