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Displaying 21 to 40 (of 691 products)

Gain Express ORP Redox Meter Tester -1999~1999mV, 1-Point Calibration, Oxidation Reduction Potential (ORP Sol'n 30ML x 2pcs)

$17.90

$ 8 .99 $8.99

4.8
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PH Tester – Digital pH Meter, High Accuracy ±0.01, Portable pH Pen for Water, Aquarium, Pool, Hydroponics, and Household Use

$8.88

$ 4 .99 $4.99

5.0
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Digital pH Meter for Food,Food PH Tester 2 Probe 0.01 Resolution High Accuracy Digital PH Meter with Backlit LCD Display & ATC for Meter,Sourdough,Fruit,Cheese,Bread,Soft Soil Water&Solution

$45.99

$ 23 .99 $23.99

4.6
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Solaxx MET01A SafeDip Digital Test Meter for pH, Chlorine, Salt and Temperature Blue

$284.49

$ 99 .00 $99.00

4.5
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Oakton pHTestr 10 Waterproof BNC Pocket pH Tester

$163.50

$ 79 .99 $79.99

4.5
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PH Meter, 0.01 High Accuracy Pocket Size with 0-14 PH Testing Range PH Tester, Digital PH Meter for Water, Water Tester for Hydroponics, Drinking Water and Pool

$7.99

$ 3 .99 $3.99

4.3
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Hanna HI775 checker Freshwater Aquarium Alkalinity Colorimeter Checker Tester

$66.00

$ 26 .99 $26.99

4.4
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Apera Instruments PH60F-E Replacement Probe for PH60F Flat pH Tester, Also Compatible with PH60, PH60S, and PC60

$40.65

$ 21 .99 $21.99

4.8
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HM Digital unisex adult Pocket science lab ph meters, Brown, Without Digital Thermometer US

$21.00

$ 10 .99 $10.99

4.7
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Professional 6-in-1 TDS, TOC, COD, UV275, EC & Temperature Meter, Accurate Reliable Water Analyzer, Digital Water Tester for Drinking Water, Hydroponics, Industrial Water, Aquariums, Tap

$59.99

$ 31 .99 $31.99

4.6
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General Tools DPH7011 Digital PH Meter with RS-232 Output

$84.13

$ 34 .99 $34.99

4.6
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Digital pH and TDS Meter Combo, High Accuracy Water Quality Tester, pH Meter 3-in-1 TDS EC Temperature Meter for Drinking Water Swimming Pool Aquarium Hydroponic

$12.59

$ 6 .99 $6.99

5.0
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Professional Anti-Blue Light Tester Card Including Anti-Blue Light Cards And Blue Light Generators For Eyeglasses Tester

$7.99

$ 3 .99 $3.99

5.0
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Apera Instruments PH60F-Z Smart Bluetooth pH Tester with Flat Sensor Powered by ZenTest Mobile App

$136.84

$ 64 .99 $64.99

4.8
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5 in 1 PH Meter for Water, PH/TDS/EC/Temp/Salt Meter, Salt Tester for Saltwater Pool, 0.01 Resolution High Accuracy Digital PH Tester for Hydroponics, Water, Wine, Aquariums and Fish Tank

$22.94

$ 9 .99 $9.99

4.6
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TDS Meter Digital Water Tester,TDS EC & Temperature Meter 3 in 1, Ideal PPM Meter for Drinking Water,RO System Aquariums Swimming Pool and More, 0-9990 ppm meter

$12.98

$ 6 .99 $6.99

5.0
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5-in-1 Water Quality Meter, PH EC CF TDS Temperature Multi-Parameter Water Quality Monitor with Backlight, Wall-mountable & Rechargeable, Water Quality Tester for Aquariums, Hydroponics, Lab

$68.99

$ 31 .99 $31.99

4.5
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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

$34.91

$ 18 .99 $18.99

4.5
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Professional Anti-Blue Light Test Card Including Anti-Blue Light Cards And Blue Light Generators For Eyeglasses Test
Out of stock
4.8
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APERA INSTRUMENTS AI3711 PH60-Z Bluetooth Smart pH Tester Powered by ZenTest Mobile App with Cloud-Based Datalogger

$118.67

$ 52 .99 $52.99

4.9
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Displaying 21 to 40 (of 691 products)