Pinpoint pH Controller

[Dgrim62 at cs_com]

I use a Pinpoint pH Controller. It works very well. Maintenance consists of 
pH probe calibration and replacement. I calibrate mine every 2-3 months. 
Every month is recommended. A probe will usually last 12-24 months, IME, and 
costs $45-$50 to replace. The only qualuity issues I have had with their 
equipment (controller and monitor-I have both) is that I have had bad probes 
upon initial purchase, meaning they don't calibrate properly from the 
beginning. My suppliers have all cheerfully exchanged the defective probes 
and all was well.
Regards,
Dave

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