8 Fairfax St SE
NAPA Auto Parts Genuine Parts Company
8 Fairfax St SE
Leesburg,  VA  20175
(703) 777-2055
Reserve Online Participant
Store Hours
Mon-Fri:7:30 AM-7:00 PM
Sat:8:00 AM-5:00 PM
Sun:9:00 AM-5:00 PM
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Part #: FAF PA203XK
Line: Fleet Charge Antifreeze

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Features & Benefits

Warranty :Standard : See Manufacturer's Complete Written Policy

The PEAK digital refractometer is a five-in-one instrument that represents the most accurate method available for field-testing engine coolant and the concentration of urea in Diesel Exhaust Fluid (DEF).

  • Easy to use
  • Simply place a drop or two of fluid in the stainless steel well and press a button. The custom-designed microprocessor delivers a nearly instantaneous readout and ensures that fluids are measured accurately. The user interface consists of two buttons, one to take readings and the other to step through various menu options
  • Easy to read
  • The large backlit LCD display is easily read, even in dim light, and removes the subjectivity associated with interpreting where a boundary line crosses tiny scale divisions
  • Easy to calibrate
  • Calibration is automatic and does not require the use of special calibration solutions, or tools. The 5-Scale Digital Refractometer automatically calibrates itself to water and is ready to use in seconds. No more screws to turn and nothing to adjust
  • 5 preset scales
  • • Final Charge Global OAT Glycol % • Final Charge Global OAT Freeze Point • NOAT/HD SCA Glycol % • NOAT/HD SCA Freeze Point •DEF Urea %


Brand PEAK
Temperature Scale Format Fahrenheit
Base Tested Ethylene Glycol
Display Format Digital
Floating Ball Used No
Use Type Multi
Tester Type Battery Conductance Analyzer
VMRS Code 53999105
SDS Required No

Safety Information

Vehicle Fitment Guide

Product Reviews