May I ask, when installing a pH meter on a storage tank, should it be installed at the top or on the side? ? ?

pH meters all use glass electrodes, which are about 20 cm in length； Where would I find leads? I’ve never seen them.

Sweat... Only the glass probe can be inserted into the liquid to be tested; the wire part cannot. Pay attention to the selection of your pH meter; pH meters installed on equipment or pipelines come with specialized sleeves

What does it mean that the wire part doesn’t work? ? A lead is simply a wire

Excuse me, do pH meters installed on equipment or pipelines come with special sleeves, and what do they look like? ? Are there any pictures?

Images cannot be uploaded for the time being； Take a look at Baidu Baike at https://baike.baidu.com/item/PH%E5%9C%A8%E7%BA%BF%E7%9B%91%E6%B5%8B%E4%BB%AA/713533?fr=aladdin; there is a small image there showing three components, which from top to bottom are: the gauge, the electrode mounting piece (protective cover), and the PH electrode

It should normally be installed on the return pipeline at the pump outlet.

This post was last edited by tuzidiandeng on 2017-11-21 at 15:07. Online pH meters are usually installed on the top of tanks, in intermediate tanks or finished product tanks. The first approach is to have the electrodes on the top of the tank and the transmitter on the ground. Or all installed on the top of the tank. For installation on the top of the tank, the pressure inside the tank is not at atmospheric level; the medium is drawn out, passed through a flow cell, and then returned to the tank. There are also instrument air supply lines, and the medium pipelines typically come equipped with insulation for heat retention or cooling systems to prevent condensation. Try to keep the medium temperature at 20 degrees. The sampling port location should be kept as far away as possible from the material inlets and outlets. Submersible PH electrodes are generally used in environments such as atmospheric-pressure containers or large-scale cleaning tanks. The main difference from ordinary electrodes is the way in which the wires are connected (they are sealed together), and these electrodes can withstand certain levels of pressure. A flow cell is not required. As for whether to install it from the top or from the side, it still depends on the specific operating conditions and requirements. For example: in the case of the alkali solution intermediate tank, it is necessary to feed material into the reactor continuously; the inflow and outflow of material from this tank are both handled by pumps. The concentration of the alkali solution is 23%, and the tank is kept under a slight positive pressure using nitrogen as a sealing agent. The pH value is measured online using an online pH meter; it is required to be maintained within a certain range while keeping the concentration of the alkaline solution constant, and if it exceeds this range, it is adjusted using 32% solution or carbonates. Installing electrodes on the side of the tank, at the pump outlet, or on the inlet pipeline of the reactor does not allow for an accurate determination of the overall pH level of the 23% alkali in the intermediate tank. To achieve greater accuracy, electrodes are placed at the top of the tank for measurement. Please pay attention to the impact of temperature differences on pH measurement, the effect of flow rate on the use of glass electrodes, as well as pipeline vibrations and instantaneous vacuum on glass electrodes. After comprehensive consideration, the tank roof installation method, which involves the most maintenance/calibration work and the highest installation costs, was adopted.