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Refractometers have been proven time and time again to be more accurate than hydrometers or reagent test strips for testing urine
Just a few drops of urine can reveal many health problems
To ensure the liquids maximum shelf life
an optional calibration solution has been specifically prepared for the MISCO Honey Refractometer with a value of 18
and grass tissues
Hanna HI 701 Checker Free Chlorine Photometer HI701 Brake Fluid Refractometer Refractometers have been proven timeItem Description: Brand New Hanna Instruments HI 701 CheckerHC Free Chlorine Photometer 0. 00 2. 50 ppm(mg l) No Reagents FINALLY! A SIMPLE TEST FOR FREE CHLORINE! Hanna HI 701 Checker Colorimeter Photometer SPECS:. SPECIFICATIONS HI 711 (Total Chlorine) HI 701 (Free Chlorine) Range 0. 00 to 3. 50 ppm (mg L) 0. 00 to 2. 50 ppm (mg L) Resolution: 0. 01 ppm (mg L) Precision: 3% of reading 0. 03 ppm (mg L) @ 25C Light Source: LED @ 525 nm Light Detector: