RHA-503  can be used for measuring the freezing point of either propylene or ethylene glycol based cooling systems. It can also be used for checking the strength of electrolyte solution batteries.

Maintaining the proper concentration of your antifreeze can save thousands on engine repairs and maintenance. This tool is used worldwide by trucking and automotive technicians to ensure proper dilution. Focusing eyepiece provides a sharp, easy-to-read scale, which is designed with semi-transparent blue background so you don't have to point the instrument in a certain direction to get your reading. Ambient room lighting provides plenty of illumination. Instrument also gives indication of the charge level in battery acid.

This precision instrument features high-quality optics with ultra smooth focusing.  

The most in common use in Europe 

Measuring range:

Ethylene Glycol: -50°C-0°C
Propylene Glycol: -50°C-0°C
Cleaner:-40°C-0°C

Battery: 1.100-1.400sg
Resolution:

Ethylene Glycol: 5°C
Propylene Glycol: 5°C
Cleaner: 5°C

Battery: 0.01sg

Calibration: zero calibration with water at 20°C