For use with HM Digital’s PH-200 and PH-80 (as well as other brands of pH meters). Always make sure your sensor is kept in an electrode storage solution. If dry, refill the pH meter cap with the PH-STOR storage solution. The sponge should be moist (not soaking wet).
GroStar by Apera EC Calibration Kit (2.77 EC, 8 oz. each) • 2.77 EC conductivity standard calibration solution• Used as a reference or ...
$10.37
pH Tester with 1 point manual calibration, ± 0.2 pH accuracy, range: 0.0 pH to 14.0 pH. Full-range pH tester. ...
$23.75
The HM Digital Hydromaster EC/TDS Probe is a replacement part for the HydroMaster HM-500.
$34.60
Gardeners can conveniently test their moisture, light, and pH levels with the handy Active Air 3-Way Meter. Moisture readings register ...
$7.60
