Meters & Solutions
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$419.20| /
Autopilot Digital pH Controller
One Stop HydroThe Autopilot Digital pH Controller (APCEPH1) accurately and reliably measures and controls the pH of any water-based solution, including hydroponi...
View full details$419.20| /Sale -
$6.13| /
Active Aqua Hydroponic pH Test Kit
One Stop HydroThe Hydroponic pH test kit is good for 150 tests. At the rate of 3 tests per week it will last one year, making it excellent value for money. This ...
View full details$6.13| /Sale -
$12.71| /
Active Air 3-Way Meter
One Stop HydroGardeners can conveniently test their moisture, light, and pH levels with the handy Active Air 3-Way Meter. Moisture readings register on a scale o...
View full details$12.71| /Sale -
$10.91| /
Active Air 2-Way Moisture/pH Meter
One Stop HydroGardeners can conveniently test moisture and pH levels with the handy Active Air 2-Way Meter. Moisture readings register on a scale of 0 (dry) to 1...
View full details$10.91| /Sale -
from $105.99| /
Cutting Edge Solutions pH Down, 1 gal, case of 4
One Stop HydroConcentrated pH adjustment liquid, acidic buffer lowers water and nutrient solution pH. Highly concentrated, use conservatively. Slowly add to pure...
View full detailsfrom $105.99| /Sale -
from $105.99| /
Cutting Edge Solutions pH Up, 1 gal, case of 4
One Stop HydroConcentrated pH adjustment liquid, alkaline buffer raises water and nutrient solution pH. Highly concentrated, use conservatively. Slowly add to pu...
View full detailsfrom $105.99| /Sale -
$46.50| /
HM Digital PH-80 pH/Temperature Meter
One Stop HydroThe PH-80 is an economically priced, reliable pH meter that is ideal for testing applications such as hydroponics & gardening, pools & spas...
View full details$46.50| /Sale -
$14.09| /
Technaflora pH Up, 1 L, case of 12
One Stop HydroTechnaflora's pH Up and pH Down enable the gardener to moderate and maintain optimum pH levels. The pH scale is a measure that describes the relati...
View full details$14.09| /Sale -
$101.92| /
HM Digital PH-200 Waterproof pH/Temperature Meter
One Stop HydroShipping Weight 0.39 lbs. Package Dimensions 2.00L x 3.30W x 8.50H Alternate Keywords: hm digital, ph, ph 200, ph meter, Barcodes 8911440...
View full details$101.92| /Sale -
$42.95| /
HM Digital COM-80 EC/TDS/Temp Waterproof Hydro Tester
One Stop HydroThe COM-80 is an economically priced, reliable EC/TDS meter that is ideal for testing applications such as hydroponics & gardening, pools &...
View full details$42.95| /Sale -
$37.00| /
HM Digital TDS-3 Handheld TDS meter
One Stop HydroIdeal for commercial use, the TDS-3 includes a carrying case with belt clip. It is highly efficent and accurate due to its advanced microprocessor ...
View full details$37.00| /Sale -
$42.95| /
HM Digital AquaPro TDS/Temperature Meter
One Stop HydroFEATURES Measures total dissolved solids (TDS) and temperature Automatic Temperature Compensation (ATC) Water-resistant housing Measurement Range:...
View full details$42.95| /Sale -
$359.00| /
HM Digital HydroMaster Portable/Wall Mount/Bench Continuous pH/EC/TDS/Temp
One Stop HydroHydroMaster Digital testers make monitoring water easier than ever by reading the levels that matter most and providing accurate readings that you ...
View full details$359.00| /Sale -
$76.95| /
HM Digital COM-100 Waterproof EC/TDS/Temp Combo Meter
One Stop HydroSPECIFICATIONS EC Range: 0-9990 µS; 0-9.99 mS TDS Range: 0-8560 ppm (mg/L); 0-8.56 ppt Temperature Range: 0-80 °C/32-176 °FResolution: 0-99: 0.1 µS...
View full details$76.95| /Sale -
$36.95| /
HM Digital Replacement Platinum Sensor for COM-100
One Stop HydroThis spare sensor is for HM Digital EC/TDS/Temp Combo Meter model COM-100. Features platinum TDS/EC sensor and thermister. Shipping Weight...
View full details$36.95| /Sale -
$6.50| /
HM Digital 1000 ppm TDS Calibration Solution, 3 oz (90 ml)
One Stop HydroNaCl calibration solution 1000 ppm comes in lightweight HDPE plastic bottles. Sealed with a coated foam liner. Shipping Weight 0.22 lbs. ...
View full details$6.50| /Sale -
$6.95| /
HM Digital PH-STOR pH Electrode Storage Solution
One Stop HydroFor 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 sol...
View full details$6.95| /Sale -
$49.99| /
HM Digital Hydromaster Replacement EC/TDS Probe
One Stop HydroThe HM Digital Hydromaster EC/TDS Probe is a replacement part for the HydroMaster HM-500. Shipping Weight 0.14 lbs. Package Dimensions 1.75L x...
View full details$49.99| /Sale -
$49.95| /
HM Digital Replacement pH Sensor for PH-200
One Stop HydroThis spare pH sensor is for HM Digital Waterproof pH Meter model P-200. Features glass pH sensor and reference tube and thermister.
$49.95| /Sale -
$59.99| /
HM Digital Replacement pH Sensor Probe for HM-500
One Stop HydroHM-500 Replacement pH probe2 Meter / 80 inch cable lengthIncludes pH storage solution, 6-month warranty
$59.99| /Sale -
$14.99| /
Luster Leaf Digital Moisture Meter
One Stop HydroDigital results from 0 to 9.9. Printed instructions and extensive plant list. Shipping Weight 0.20 lbs. Package Dimensions 12.75L x 4.00W x 1....
View full details$14.99| /Sale -
$16.29| /
Luster Leaf Digital Soil pH Meter
One Stop HydroDigital results from 3.5 to 9.0. Instructions and plant pH preference list included. Shipping Weight 0.20 lbs. Package Dimensions 12.75L x 4.0...
View full details$16.29| /Sale -
$32.99| /
Milwaukee Instruments pH 600 pH Tester With 1 Point Manual Calibration
One Stop HydropH Tester with 1 point manual calibration, ± 0.2 pH accuracy, range: 0.0 pH to 14.0 ph. Full-range pH tester. 30-day warranty, snap-over protectiv...
View full details$32.99| /Sale -
$34.99| /
Milwaukee Instruments pH 600 pH Tester w/1 Point Manual Calibration
One Stop HydropH Tester with 1 point manual calibration, ± 0.2 pH accuracy, range: 0.0 pH to 14.0 pH. Full-range pH tester. 30-day warranty, snap-over protective...
View full details$34.99| /Sale -
$551.99| /
Milwaukee Instruments Mi 805 Commercial Grade Combo pH/EC/TDS/Temp Meter
One Stop HydroMulti-range pH/EC/TDS and Temperature meter- 4-in-1 pH/EC/TDS/Temperature probe- The rugged MA851D/1 probe has been designedfor heavy-duty applicat...
View full details$551.99| /Sale -
$549.99| /
pH/ORP/Temp/Data logging Controller with Wi-fi
One Stop HydroMilwaukee pH & Temperature Monitor, Wifi Easy to set up, these devices accurately control water variables with programmable hysteresis, automat...
View full details$549.99| /Sale -
$649.99| /
Milwaukee SPO pH/IDC/Temp/Data logging Controller with Wi-fi
One Stop HydroMilwaukee pH & Temperature Monitor with Wifi Easy to set up, these devices accurately control water variables with programmable hysteresis, aut...
View full details$649.99| /Sale -
$347.99| /
Milwaukee Instruments MC720 Dosing Pump Kit
One Stop HydroThe MC720 Kit - Comes with the MC122 pH controller and MP810 dosing pump The small and precise flow of the MP810 provides fully automated pH contro...
View full details$347.99| /Sale -
$25.99| /
Milwaukee Instruments pH 7 Calibration Solution, 20 ml Sachets, case of 25
One Stop HydroAvailable in 220 ml bottles and 20 ml sachets. Traditional buffer solutions are packed in 220 ml leak-proof bottles and are recommended for lab ap...
View full details$25.99| /Sale -
$10.99| /
Milwaukee Instruments pH 4.01 Calibration Solution, 230 ml
One Stop HydroAvailable in 230 ml bottles and 20 ml sachets. Traditional buffer solutions are packed in 230 ml leak-proof bottles and are recommended for lab app...
View full details$10.99| /Sale -
$10.99| /
Milwaukee Instruments pH 7.01 Solution, 230 ml
One Stop HydroAvailable in 230 ml bottles and 20 ml sachets. Traditional buffer solutions are packed in 220 ml leak-proof bottles and are recommended for lab ap...
View full details$10.99| /Sale -
$11.99| /
Milwaukee Instruments 1382 ppm Calibration Solution, 230 ml
One Stop HydroAvailable in 230 ml bottles and 20 ml sachets. Traditional buffer solutions are packed in 230 ml leak-proof bottles and are recommended for lab app...
View full details$11.99| /Sale -
$206.99| /
Milwaukee Instruments MA871 Digital Brix Refractometer, Range 0-85%
One Stop HydroDigital Sugar Refractometer for general purpose with automatic temperature compensation (ATC).Range 0-85% Brix, resolution 0.1%, units come with ba...
View full details$206.99| /Sale -
$85.99| /
Hanna EC/TDS Probe for HI981409 & HI981410
One Stop HydroEC/TDS Probe for HI981409 & HI981410 with DIN connector measures 24 cm (9.4"). The meter switches off after five minutes of inactivity to save ...
View full details$85.99| /Sale -
$24.95| /
Microbe Life Hydroponics pH UP, 1 qt
One Stop HydroMicrobe Life Hydroponics pH UP is formulated with R/O and UV sterilized water and combines two pH adjusters for buffered effectiveness. It contains...
View full details$24.95| /Sale -
$127.99| /
Oakton Replacement Sensor for Waterproof Multiparameter Testr35 series Pocket Meters
One Stop HydroReplacement sensor for Oakton Waterproof Multiparameter TestrTM 35-series Pocket Meters (OK3542500 and OK3542505). Shipping Weight 0.50 lbs. P...
View full details$127.99| /Sale -
$156.00| /
Bluelab pH Down, 1 Liter Bottle, case of 12
One Stop HydroOptimum growth needs optimum pH. And Bluelab makes optimum simple. If your pH isn't in the right range—and that's 5.5-6.5 for most plant varieties—...
View full details$156.00| /Sale -
$203.00| /
Bluelab pH Up, 1 Liter Bottle, case of 12
One Stop HydroOptimum growth needs optimum pH. And Bluelab makes optimum simple. If your pH isn't in the right range—and that's 5.5-6.5 for most plant varieties—...
View full details$203.00| /Sale -
$25.00| /
Bluelab Meter Carry Case
One Stop HydroBluelab is excited to introduce a new accessory which makes transporting and using their meters even easier! The Bluelab Carry Case provides a cust...
View full details$25.00| /Sale