Selling an Apex PM2 + a working salinity probe. I'll include a packet of calibration fluid for the probe. Selling for $150 for the pair, shipped to your door. Or I would trade for a PM1 and ORP probe.
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Im intrested. Whats the difference between the pm1 and pm2
Still available? Trades?
PM1 does ORP or pH
PM2 does salinity and temperature
Thanks. How old is the set and do you have photos?