That's a pretty nice meter which is, I assume, being sold so cheaply as it is a dicontinued model. It has specs which indicate that it can support a higher quality electrode. The first step up is to double junction models such as http://www.coleparmer.com/Product/pH...or/EW-59001-70
. This only increases the price a few $ and will prolong the life of the electrode. I'd estimate 6 mos life for a single junction and 1 year for a double junction. A very good electrode would cost over $200 but the ones I have been using last over 2 years and hold calibration for weeks.
Note that you will also need a thermister based temperature probe (or will have to measure the temperature by other means and enter it manually into the instrument), buffers (4 and 7) and storage solution for whichever electrode you decide on.
And Canada is 110 so that wall wart wouldn't work in Canada either. You will need a 1/2 amp 9 V wall wart which you can get at radio shack. You can cut the connector from the 220 V unit you have and splice onto the wires from the new unit. Be very careful to get the polarity right. You can also take the unit to Radio Shack and possibly get a wall wart with matching connector or at least an adapter.
The temperature probe is probably 2.5 mm phone but you can find that out at Radio Shack too.