Enviro Testers Optical Handheld Refractometer

This optical handheld refractometer has an astigmatism range of 1° to 180°, a cylinder tolerance of 0.5D, and a wavelength of 850 ± 20nm. 

SKU: ETEHRFM-224 Category:

Features

  • Non-contact and non-invasive  
  • Child-friendly and speedy inspection  
  • Comprehensive detection modes  
  • Easy targeting Luminant cross-shape facilitates the targeting for operator 
  • Ultrasonic distance measurement  
  • Thermal printer is connected by infrared. 

 

Technical Specifications

Sphere Range   -6.0D to +8.0D, -9.0 to +2.0 D 
Sphere Intervals  0.25D to 0.1D 
Sphere Tolerance  ±0.5D 
Cylinder Range  -3.0D to +3.0D 
Cylinder Intervals  0.25D to 0.1D 
Cylinder Tolerance  ±0.5D 
Astigmatism Range  1° to 180° 
Axis Of Astigmatism Intervals   
Axis Of Astigmatism Tolerance  0.25D to 1.00D, ±10° 
Axis Of Astigmatism Tolerance  1.25D to 3.00D, ±5° 
Working Distance  10.55 in ± 0.394 in (268 mm ± 10 mm), 13.189 in ±0.394 in (335 mm ± 10 mm) 
Wavelength  850 ± 20nm 
Output Of The Laser Radiation  150 μW  to 200 μW 
Battery Voltage  11.1 V 

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