In order to keep accurate records of temperature, your meter must be reliable and properly calibrated. Hanna calibration plugs provide a quick and easy way to test the accuracy of the meter. If the reading differs by more than 0.8°F (0.4°C) from the plug value, return the unit to your nearest Hanna dealer for recalibration. Choose the calibration plug that best suits your needs:
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We only sell & ship chemicals to businesses at commercially zoned locations verified by 3rd party sources. A business at a residence will not be able to buy or receive chemicals at that location. Such businesses will not be able to divert shipment in order to meet our policies. No exceptions.