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Meters & Controllers

GroStar GS4 5-in-1 Digital pH/EC/TDS/Temperature Meter
In Stock: 54
$141.25 $178.99 -21%
Active Air 3-Way Meter for pH, Light, and Moisture
In Stock: 1264
$10.93 $13.09 -17%
GroStar GS2 Soil pH/Temperature Meter
In Stock: 112
$202.81 $256.99 -21%
Active Air 2-Way Moisture/pH Meter
In Stock: 118
$9.83 $11.84 -17%
P3 International Save a Drop Water Meter
P3 International Save a Drop Water Meter
In Stock: 1715
$19.27 $19.95 -3%
GroStar pH Probe Maintenance Kit
GroStar pH Probe Maintenance Kit
In Stock: 69
$23.17 $23.99 -3%
Apera Instruments GroStar GS3 4-in-1 EC/TDS/Temperature Pen Meter
In Stock: 79
$95.58 $113.99 -16%
Apera Instruments GroStar pH 4/7 Calibration Solution Kit - 8 Oz Each
Out of stock
$18.34 $18.99 -3%
GroStar GS1 Digital pH/Temperature Meter
In Stock: 131
$100.93 $115.99 -13%
HM Digital TDS-3 Handheld TDS Meter
In Stock: 14
$26.03 $36.99 -30%
HM Digital PH-80 Digital pH/Temperature Meter
Out of stock
$39.97 $47.99 -17%
TrolMaster Digital Flow Meter DFM-1 for Aqua-X Pro Controller - 1-in
In Stock: 8
$97.05 $103.95 -7%
GroStar GS4-E Replacement pH/EC Combo Electrode for GS4 Meter
GroStar GS4-E Replacement pH/EC Combo Electrode for GS4 Meter
In Stock: 70
$67.07 $79.99 -16%
GroStar GS2-E Replacement Soil Spear pH Electrode for GS2 Soil pH Meter
In Stock: 97
$143.62 $181.99 -21%
Apera Instruments GroStar pH 4/7/10 Calibration Solution Kit - 8 Oz Each
In Stock: 1
$24.30 $28.99 -16%
GroStar GS1-E Replacement pH Electrode for GS1 pH Meter
GroStar GS1-E Replacement pH Electrode for GS1 pH Meter
In Stock: 94
$42.75 $50.99 -16%
HM Digital 1000 ppm TDS Calibration Solution - 3 Oz (90 mL)
In Stock: 27
$10.99
HM Digital COM-80 Waterproof EC/TDS/Temp Hydro Tester
In Stock: 11
$48.28 $52.99 -9%
Apera Instruments GroStar EC 2.77 Calibration Solution Kit - 8 Oz Each
Apera Instruments GroStar EC 2.77 Calibration Solution Kit - 8 Oz Each
In Stock: 84
$14.47 $14.99 -3%
TrolMaster Digital Flow Meter DFM-3 - 1.5-in
In Stock: 8
$107.97 $115.50 -7%
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