I am looking at 2 meters right now and not sure, seeing if any of you have used them, i cant really find decent reviews on either.

TRI500 and the PTTM500

My local store is worms way, i just bought the Grocheck combo meter and see that it has bad reviews so now im second guessing and thinking of taking it back to get one of the top two.

The problem with the trimeter is the tds probe is a factory replacement item,
in other words, you have to send in the whole meter when the tds probe fails.

Now you don't have a pH meter
while your tds meter is in for warranty. not good.

The trimeters are not very accurate,
good to .1

I have one, and wish I had the $220 back.

There are only two mfg that make pH meter with .01 accuracy,
for under $1000.
Milwaukee and PinPoint.

You should be able to find them on ebay for about $90-100

You can also get a matching tds meter
for about the same price,
so you save money
and get better equipment.

.01 is 10 times more accurate than a meter that measures to .1

A spare replacement probe can be kept on the shelf,
and you can change out a faulty probe in seconds,
not waiting on the mail.

PinPoint is American made.

Milwaukee is made in Romania.

I have one of each.

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