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Hydrofarm
With a strong portfolio of manufactured and distributed brands, we are one of the leading companies in the global Controlled Environment...
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10 months 3 days
Shoemakersville, US
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Meters & Controllers

GroStar GS4 5-in-1 Combo Pen
In Stock: 100
$148.20 $178.99 -17%
Milwaukee Instruments MA871 Digital Brix Refractometer, Range 0-85%
Out of stock
$140.13 $199.00 -30%
GroStar GS2 Soil pH Pen
In Stock: 124
$212.78 $256.99 -17%
Milwaukee Instruments pH600 Digital pH Pen
Out of stock
$34.00
P3 International Save a Drop Water Meter
In Stock: 2205
$16.52 $19.95 -17%
GroStar pH Probe Maintenance Kit
In Stock: 75
$19.86 $23.99 -17%
Active Air 3-Way Meter
In Stock: 1012
$9.09 $13.09 -31%
Active Air 2-Way Moisture/pH Meter
In Stock: 556
$8.17 $11.84 -31%
Active Aqua Grow Flow Ebb and Gro Controller Unit w/2 Pumps
In Stock: 101
$322.35 $389.33 -17%
GroStar GS3 EC Pen
In Stock: 81
$94.38 $113.99 -17%
GroStar pH 4/7 Calibration Kit
In Stock: 54
$15.72 $18.99 -17%
GroStar GS1 pH Pen
In Stock: 172
$98.27 $115.99 -15%
Hydrofarm Electronic Water Timer
In Stock: 1041
$26.07 $31.49 -17%
Milwaukee Instruments pH 600 pH Tester w/1 Point Manual Calibration
Out of stock
$23.52 $35.00 -33%
Aeromixer Aerobuddy Timer & Power Controller
In Stock: 27
$59.42 $79.00 -25%
HM Digital TDS-3 Handheld TDS meter
In Stock: 56
$24.81 $36.99 -33%
Milwaukee Instruments EC40 PRO EC/TDS Nutrient Meter
Out of stock
$34.87 $95.00 -63%
HM Digital PH-80 pH/Temperature Meter
In Stock: 201
$39.41 $47.99 -18%
GroStar GS4-E Replacement Electrode
In Stock: 73
$66.23 $79.99 -17%
GroStar GS2-E Replacement Electrode
In Stock: 97
$150.68 $181.99 -17%
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