Electronic Plant Monitoring

You can’t trust nature (it’s red in tooth and claw, remember?) but you can monitor its effect on plants with any of these electronic meters. The pH meter has a 7-1/2" long metal probe with a 1-5/8” x 3/4” ballistic meter on top that displays pH from 3 to 10. The moisture meter has a 7-1/2” long probe with a 1-1/2” x 3/4” ballistic meter, and measures 11” long OA, with a watering chart on the back of the package. No batteries: they work via chemical reaction to different metals (either that or it’s magic).