The original Hanna Halo wireless pH meter is one of the best standalone pH testers we’ve ever used so naturally, Hanna went and made it even better with the Halo 2. The Halo 2 has all the same features of the original wireless pH meter but this new version also has a built-in screen, so pairing it up to your phone is optional to make at a glance measurements of pH.
You’d think that having to pair up a pH pen to a separate app would put a speed bump into the process of measuring pH but the Halo and Halo 2 connect to the Hanna Lab app pretty much as fast as you click through the connection settings. Since there’s only one button on the outside of the Halo 2, and one secondary button inside the battery cover, the bluetooth connection is helpful for accessing a load of extra features such as – most importantly – the calibration settings with all the data points and time that the calibration was last performed.
我们喜欢Halo 2的一件事是，它是少数几个带有内置屏幕的手持式设备之一，该单元将pH值报告为两个小数点位置，从而为用户提供了更大的分辨率来读取pH值及其趋势。即使您已经有了某种监视器或控制器，我们一直很欣赏单独的pH计，可以仔细检查在水族馆系统中“安装”的pH探针的校准，而无需将其删除以验证准确性。
通常，您需要每年至少重新校准任何pH表，并且Halo 2会提醒您何时进行校准，但是根据我们的经验，Halo pH探针可以轻松地保持一年多的精度！即使在超过12个月后，pH测量仍然非常准确，重新校准也不会校正pH偏差超过0.05个pH单元。
pH测量的可靠性是由于Hanna使用内置温度传感器制作自身的高质量pH电极，以进行自动温度补偿（ATC），以进行最准确的pH读数。随着额外的奖励，汉娜能够使Halo 2 IP65防水和抗尘能力，因此在炎热潮湿的水族馆工作环境中几乎没有机会破坏该仪表。
令我们惊讶非常实惠的$ 115即使第二代具有内置屏幕以显示当前的pH读数，它也比原始光晕便宜六十美元，并且配有几个校准溶液，清洁溶液和一小瓶存储解决方案。Any old pH pen will work if you’re simply looking for a simple pH pen to tell you whether a solution is basic or alkaline but if you want a really accurate reading and the extra additional features that comes from connecting the pH meter to your phone, theHANNA的Halo 2是我们使用过的最好的无线pH仪表。
