Industrial Water Level Transmitter, 4-20mA Output Displays

the product which was received and noticed there is NO operating/instruction manual of with this product.

Después de 3 años de uso . Es el mejor medidor de nivel de agua ,extremadamente exacto , y muy confiable ,es de calidad INDUSTRIAL.

Excellent product. The only negative part is the lack of the instruction manual, however i searched for it and found PDF file that I configured it and install it smoothly.

Came fast and exactly as described.

This meter works fine. It provides both graphical and numerical displays. It can use voltage or current inputs. I used the current loop input to display the water depth in my well with a two-wire (0-5 meter depth) pressure sensor (several are listed on Amazon) . The current-loop sensor is powered by this meter and it works by regulating the through-current from 4-20 milliamps to indicate pressure (or depth). The default vertical bar display reads zero at 4 ma and 100% at 20 ma. I think there are settings to change this but I haven't tried them. I did change settings to calibrate the numerical depth display to read in feet (vs meters). The meter is designed for 220 volts but it works fine on 120 VAC; at 120 VAC it only delivers 12 vdc (vs 24) to the current loop but that still works fine, at least for the pressure/depth sensor I bought. My meter I included four internal relays to control external things (like pumps or valves) at two high values and two low values. Identical-looking versions of the meter meters may not have these relays. I think the meter was intended for panel mounting because exposed screws on the back will have high (mains) voltage. So you need to install in a way that prevents electrical shock or shorting. There appear to be several Amazon sellers for this meter (or one closely like it) but I found the listing from "nineone" included the best technical data on connecting/using the meter. By far, the greatest challenge is lack of instructions. The "nineone" listing on Amazon is sufficient for connecting wires and a smart phone can translate the Chinese markings on the actual meter. But programming requires real instructions. I would have given only four stars for lack of instructions until I found technical information online which allowed me to program the meter. If you Google "T80 level meter instructions" (especially the page at "finglai.com) you should find enough clues to program this meter. Still, I needed to experiment to get it right.

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