Online pH meter
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Who knows which manufacturer’s pH meters perform best? What is the typical error range for industrial pH meters? This post was last edited by naska on 2008-5-9 11:16.]
E+H and Toledo are both good.
E+H, ABB – these are the brands used by our unit
E+H is okay....
I have used those from the Japanese company DKK, which come with an ultrasonic automatic cleaning device; they are excellent for measuring the pH of wastewater.
Has anyone used a device for measuring the acidity level in biodiesel? Can pH be measured with it?
Japan’s DKK company is pretty good; as far as I know, many chlor-alkali plants in China use their products
What is the cost-performance ratio of these units mentioned above? What’s the approximate price range?
Mettler’s electrodes come with a one-year warranty, and they are of good quality; after all, they are the pioneers of composite electrodes: lol
DKK and YAMATAKE are good
A set imported from E+H costs around 15,000, while composite electrodes cost around 3,000. The others imported are more or less the same. Domestic models under 10,000. It works well in most situations. Those with a nominal temperature resistance of over 100 degrees have a short actual service life; for example, when operating at 70 degrees, their lifespan might be only half a year. Therefore, reducing the dielectric temperature is one of the key methods to extend electrode life.
I’ve used the ones from Suzhou Hanxing; they’re pretty good and inexpensive. I haven’t used any foreign brands, so I’m not sure
e+h now offers digital electrodes, which have significant advantages over the previous analog ones in terms of interference resistance, ease of maintenance and calibration, as well as lower costs for PH cables. Moreover, these are their patented products, and they perform well
I’ve used those made by Hitachi in Japan; the price of the electrodes was originally 3,000 yuan, but now it’s 5,000 yuan. I’ve switched to Mettler’s ones now, and they seem similar – there isn’t much difference; both work fine. However, after using them for a while, drift in the zero point occurs with both types