lance can you send me step by step to make my own ph sensor,please i need this too, please send me e mail : [email protected]
i had seen post #39 before, do we need ph phrobe?
If your PLC has a milivolt analog input module, then you can use a manufactured pH sensor as a PLC input.
my plc is omron cp1e, "The analog input signal ranges are 0 to 5 V, 1 to 5 V, 0 to 10 V, -10 to +10 V, 0 to 20 mA, and 4 to
yeah, it's for one time project, but i wanna compare with the probe and without the probe , how the measurement.
No, with the smallest resolution being 0 to 5 volts, the 0.001 to 0.010 volt output of the pH probe will not be high enough to read with your Omron CP1E PLC. At best, you might be able to detect when the pH probe is connected or disconnected by the very small change in the 0-5 volts input range.
hmm, i see , that isn't option,
Yes, that transmitter should work, if you get the optional pH electrode that works with it. Otherwise you might not get the correct milivolts into the transmitter. It converts the milivolt pH signal into a 4-to-20 miliamps signal, so use the 4-20 miliamp range and setting of your Omron analog input.
thank you for your information, first i will make my own ph sensor, and i will be back here soon
hey lancie , i already make it, but output ampere only seen 1.5 mA, how's it? is that good? is that can coneect to plc, i test it in normal water and got only 1.5 mA, how's your opinion?
