Which is the best option for measuring pH at minus 20 degrees?
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We are currently using E+H, but its temperature range is from minus 15 to 80 degrees; it often gives inaccurate readings or fails to display any information at all. Therefore, we need to switch to a more reliable model. I hope everyone can recommend some options. The medium used is ethylene glycol coolant, and there are no other special requirements apart from a low operating temperature
Try Mettler; it has a good reputation in the industry
Low temperature of the medium or the environment? Mettler is the only one that can achieve such low temperatures for media.
To measure pH at low temperatures, a low-temperature electrode is required. The Mettler brand is available; you can also check out the following brands: German Knick, and WTW’s SI Analytics (I believe this brand offers electrodes suitable for use at -30 degrees). If one can’t find it, one will have to modify it using an existing pH electrode.