FrostCheck Test KitConfirm the level of anti freeze inside ground and air source heat pump systems. The Sentinel FrostCheck Test Kit is designed for use on both installation and maintenance of Ground or Air Source Heat Pump systems that use glycol based heat transfer (thermal) fluid to monitor the level and condition of the antifreeze thermal fluid inside the system. Kit Includes: Pack of pH papers Mini InfraRed thermometer Refractometer Sample bottle Plastic dropper
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