Bluelab PENCON Conductivity Pen and Digital TDS Meter, Water Tester for Temperature and Nutrient (CF, EC, PPM 500, PPM 700), TDS Testing Kit for Hydroponic System and Indoor Plant Grow

$29.9

Bluelab Conductivity Pen Meter and Probe Care Kit for Conductivity-Water, Temperature and Nutrient Tester (CF, EC, PPM 500/700) with EC Solution and Cleaner for Hydroponics and Indoor Growing

$195.76

Bluelab METCOM Combo Meter for pH, Temperature, Conductivity (Nutrient) in Water with Easy Calibration, Digital TDS Tester for Hydroponic System and Indoor Plants

$29.9

Bluelab METCOMPLUS Combo Meter PLUS for pH, Temperature, and Conductivity in Water and Soil with Easy Calibration, Digital Nutrient (TDS) Testing Kit for Hydroponic System and Indoor Plant Grow

$159.5

Bluelab METMULTI Multimedia Meter for Water, Soil, Coco, Rockwool, Rootzone Measurements with Easy Calibration and Leap pH Probe Digital Testing Kit for Hydroponic System and Indoor Plant Grow, Clear

$184.8

YINMIK pH EC Meter for Water Hydroponics, PPM Meter for Nutrients, Measure pH PPM Conductivity Temperature of Hydroponic Garden Water and Nutrient Solution, EC pH TDS Meter for Water, Aquarium, Pool

$42.99

Bluelab METPULSE Pulse Meter Water 3-in-1 Moisture/Nutrient (TDS)/Temperature Test Kit for Garden Soil, Coco, and Solution, Ester for Hydroponic System and Indoor Plant Grow, Clear

$16.9

TDS Meter, Electronic Water Tester with 0-9990 PPM Measurement Range, Hand Held Digital Water Test Pen for Farming, Aquariums, Pools, Household Drinking Water (Blue)

$19.99

CANNABMALL PH Meter, TDS PPM Meter and 3 in 1 Soil Moisture Meter Combo, High Accuracy Lab PH/EC Tester Digital Kit [Upgraded] for Home Water, Hydroponics, Plants Garden Soil and Aquarium PH Pen

$22.79

TDS Meter Water Quality Tester,HASFINE Digital Conductivity Meter 3 in 1 TDS,EC and Temperature Meter, Accuracy Testing Pen 0-9999 PPM Meter for Drinking Water, Aquariums,Pool and More

$182.65

TDS Meter Digital Water Tester - PPM Quality Testing Tool 3-in-1 (TDS, EC & Temp) High Accuracy ATC Tester, Nutrient Testing Pen for Hydroponics, Monitor Ro System, Pools, Aquariums & Saltwater Tanks

$538.67

Sustee Aquameter, Set of 5, Plant Soil Moisture Sensor (Green, Small)

$15.99

5 in 1 TDS Meter PH Tester, 0.01 High Accuracy Digital PH Meter for Water, PH/TDS/EC/Salt/Temp Tester, PPM Meter Water Tester for Drinking Water, Hydroponics, Plants, Aquarium and Pool

$12.97

Bluelab PROBPH pH Probe for Water, Replacement Electrode for Meter, Monitor, and Controller with Easy Calibration, Tool for Hydroponic System and Indoor Plant Grow

$88.39

TDS Meter Digital Water Tester,WoEluone 3 in 1 TDS,Temperature and EC Meter,Accurate Ideal PPM Meter for Drinking Water, Aquariums,RO System and More

$34

LAWNFUL 2-In-1 Digital Soil Meter for Conductivity & Temperature, Professional Soil Themometer EC Meter, Soil Test Kit with LED Display for Gardening, Lawn, Indoor&Outdoor Plant, Potting, Farm (White)

$4.5

Bluelab CAREKITPHCON Probe Care Kit for pH and Conductivity (TDS) Probes and Pens with 4 Solutions and Cleaners, Cleaning Kit Tool for Hydroponic system and Indoor Plant Grow

$21.41

AC Infinity pH Meter PRO Kit, High Precision Digital pH Pen with ±0.01 pH Accuracy and Interchangeable Probe, Nutrient Test pH Meter for Water Hydroponics Plants, Gardening, Aquariums, Swimming Pools

$19.99

GISNPA PH Meter, 5 in 1 pH/TDS/EC/Salinity/Temp Meter, Waterproof Pool Salt Tester, 0.01 Resolution High Accuracy Water Tester for Drinking Water, Hydroponics, Saltwater Pool, Aquarium, Koi Fish Pond

$91.96

pH/EC Conductivity Meter with ATC Water Quality Tester 0.0-14.0pH / 0~19.99ms/cm Aquarium, Hydroponics Tool

$199

Dr.meter Soil Moisture Meter, Plant Water Meter for Garden Lawn Farm Indoor & Outdoor Use, Soil Tester Hygrometer Sensor for House Plants, Gardening Gifts, No Battery Needed

$19.99

Soil Moisture Meter,4-in-1 Soil Ph Meter, Soil Tester for Moisture, Light,Nutrients, pH,Soil Ph Test Kit, Great for Garden, Lawn, Farm, Indoor & Outdoor Use (No Battery Required)

$21.98

Suplong Plant Soil Moisture Meter, Precise Moisture Meter for Plants, Plant Moisture Meter for Indoor & Outdoor Plants, Garden, Farm (No Batteries Required)

$12.99

UIUZMAR Digital pH Meter pH TDS EC Meter for Hydroponic Nutrient Solution pH and EC Meter with LCD Display TDS Water Tester pH PPM Meter for DWC Setup Aeroponic Growing Tent Indoor Plant Grow

$22.79

apine Soil Moisture Meter, Plants Moisture Meter, Plant Water Meter for Indoor/Outdoor Plants， Hydrometer for Plants（Green）

$6.59

CIHOPE pH and TDS Meter Combo, Professional pH Meter for Water pH Tester Digital pH Pen, 3-in-1 EC Temperature TDS Meter Digital Water Tester for Drinking Water, Hydroponics, Pool and Aquarium

$42.69

Hofun TDS Meter Digital Water Quality Tester, TDS, Temperature & Conductivity Meter 3 in 1, 0-4999 ppm, EC Meter, Digital Water Hardness Testers for Drinking Water, PPM Meter for Hydroponics Aquarium

$130

PH Meter, Digital PH Meter, PH Meter for Water, PH Tester 0.01 PH High Accuracy Water Quality Tester with 0-14 PH Measurement Range, PH Meter for Household Drinking Water, Aquarium, Swimming Pool, Spa

$17.19

Dr.meter Soil Moisture Meter, 2 Packs Soil Test Kit for Garden Lawn Farm Indoor & Outdoor Use - Soil Tester Hygrometer Sensor for Houseplants - Plant Water Meter-No Battery Needed, Gardening Gifts

$9.99

Sonkir Soil Moisture Meter, 4-in-1 Soil Ph Meter, Soil Tester for Nutrients, Moisture, PH and Light, Soil Ph Test Kits for Plant, Great for Garden, Lawn, Indoor & Outdoor Use (No Battery Required)

$15.99

XLUX Long Probe Deep Use Soil Moisture Meter Sensor, Water Monitor Indicator, Hygrometer for Outdoor Indoor Large Pot Plants, Flower, Gardening, Farming, 2 Pack

$9.99

Soil Moisture Meter for House Plants, Plant Water Meter,Plant Moisture Meter for House Plants and Outdoor Plants, No Batteries Required (Green)

$22.99

bluelab pH Pen-Digital pH Tester - Reliable & Accurate for High Yield Crops - Hand-Held Meter - Measures pH & Temperature in Solutions and Soil Solutions - Optimize Plant Health & Performance,White

$6.99

Gouevn Soil Moisture Meter, Plant Moisture Meter Indoor & Outdoor, Hygrometer Moisture Sensor Soil Test Kit Plant Water Meter for Garden, Farm, Lawn (No Battery Needed)

$7.99

Kensizer Soil Tester, Soil Moisture/pH Meter, Gardening Farm Lawn Test Kit Tool, Digital Plant Probe, Water Hydrometer for Indoor Outdoor, No Battery Required

$6.98

Soil Moisture Meter, Plants Moisture Meter, Gardening Tool Kits for Plant Care, Plant Water Monitor for Garden, Farm, Lawn Indoor & Outdoor Use, No Batteries Required

$9.97

Bluelab CAREKITPH pH Probe Care Kit with Calibration Supplies, Storage Solution, and Brush, Used for Pen, Meter, Monitor, Controller and Tools for Hydroponic System and Indoor Plant Grow, Clear

$16.9

Bluelab STSOL120 KCL Storage Solution 120ml pH Probe and Pen, Maintain Meters Used for Water, Soil, and Hydroponic System or Indoor Plant Grow White

$9.99

Raintrip Soil Moisture Meter,Moisture Meter for Plants，Plant Water Meter,Great for Garden, Lawn, Farm, Indoor & Outdoor Use (No Battery Required)

$13.99

Digital pH Meter, pH Meter for Water, 0-14 pH Measurement Range pH Tester, 0.01 High Precision Water Quality Tester with ATC for Drinking Water Pool

$29.99

HM DIGITAL TDS Meters TDS-3 Handheld Temperature TDS ( PPM ) Tester, 0 - 9990 ppm, 1 ppm Resolution, +/- 2% Readout Accuracy Testing Water Quality For Hydroponics Aquariums Pools Drinking etc

$93.5

YINMIK pH Meter, Digital pH Tester for Hydroponics, pH Temp Meter with Horizontal Display for Pool, Spa, Hot Tub, Indoor Plants, Koi Ponds, Drinking Water, Wine Beer Making, Aquarium, Aquaculture

$24.69

[Upgraded] Soil Moisture Meter, 4-in-1 Soil pH Tester, Soil Moisture/Light/Nutrients/pH Meter for Gardening, Lawn, Farming, Indoor & Outdoor Plants Use, No Batteries Required

$9.99

iPstyle Digital TDS Meter Water Tester, PPM Water Quality Tester Measuring Range 0-9999ppm, Ideal for Drinking Water, Swimming Pool, Aquariums, Hydroponics (Grey) (TDS)

$42.69

GU GREENERY : UNLIMITED Monitor Brass Soil Probe, Soil Sampler and Plant Moisture Meter, No Batteries Required, Root Aerator and Plant Water Monitor

$36.99

XLUX Soil Moisture Meter, Plant Water Monitor, Hygrometer Sensor for Gardening, Farming, Indoor and Outdoor Plants, No Batteries Required

$10.99

Hofun High Accuracy TDS Meter Digital Water Tester, Water Quality Tester with True ATC, 3 in 1 TDS, EC & Temp Meter, PPM Water Testing Kits for Drinking Water, Tap, Well, RO/DI System, Hydroponics

$15.57

Sper Scientific Turbidity Meter, Water Quality Tester, Portable Water Quality Meter for Field or Lab, Turbidimeter for Water Test with Carry Case Model# 860040

$369

VIVOSUN Soil Tester, 3-in-1 Plant Moisture Meter Light and PH Tester for Home, Garden, Lawn, Farm, Indoor and Outdoor Use, Promote Plants Healthy Growth

$20.29

Water Conductivity Sensor, Domestic Water Hydroponics Sensor with Waterproof Probe for Liquid Quality Monitoring Detection Tester Module Parts

$9.95

TDS Meter Digital Water Tester - ppm Meter, EC & Temperature Test Pen 3-in-1 | Easy to Use Water Quality Tester | Ideal for Testing RO Drinking Water Hydroponics Aquarium Swimming Pool & More (Green)

$42.15

4 in 1 Digital pH Meter for Water, ±0.01 Resolution High Accuracy Tds Meter Digital Water Tester with ATC pH Tester, Water Tester for Drinking Water, Brewing, Hydroponics, Wine, Pool and Aquarium

$189.28

RCYAGO PH Meter, 5 in 1 PH/TDS/EC/Salinity/Temp Meter with ATC, 0.01 Resolution High Accuracy Water Testing for Drinking Water, Hydroponics, Seawater, Aquariums, Fish Tank and Swimming Pools

$10.79

Yewhick Digital pH Meter for Food, Food pH Tester with High Accuracy pH Probe for Sourdough and Bread, Food pH Meter for Canning, Meat, Cheese, Solid Samples and Water, 0.01 Resolution

$39.99

4-in-1 Soil Moisture Meter Digital Plant Temperature/Soil Moisture/PH Meter/Sunlight Intensity/Environment Humidity Backlight LCD display Soil Test Meter for Gardening, Farming and Outdoor Plants

$11.04

PAR Meter 400-700 nm, DLI Calculator PPFD Recording, Convenient Bluetooth Connection to Your Phone, for Plant, Grow Tents, LED Grow Light, Greenhouses, Agriculture

$180.45

SZHLUX Soil Ggardening Tools 3-in-1 Moisture Meter Light & PH Tester for Plant Care, for Garden, Lawn, Farm, Indoor & Outdoor, 11.4in, Green

$13.45

Pool Salt Tester & PH Meter, Hofun Digital Salinity Meter and PH Tester for Pool Saltwater and Drinking Water, 5 in 1 Salinity PH Temp EC and TDS Meter Swimming Pool Hot Tub Spas, High Accuracy

$24.99

hygger Salinity Tester, Transparent Acrylic Aquarium Hydrometer Sea Specific Gravity Test Salinity Meter for Fish Tank Pond Water Saltwater Freshwater, Accurate Automatic Hydrometer

$23.99

VIVOSUN Digital pH and TDS Meter Kits, 0.01pH High Accuracy Pen Type pH Meter ± 2% Readout Accuracy 3-in-1 TDS EC Temperature Meter for Hydroponics, Household Drinking, and Aquarium, UL Certified

$29.99