Best Selling - Gain Express

$Rea-503Catc 5-In-1 Automotive Battery Antifreeze Refractometer Atc For Specific Gravity Ethylene$

REA-503cATC 5-in-1 Automotive Battery Antifreeze Refractometer ATC for Specific Gravity, Ethylene Propylene Glycol System & Windshield Screenwash Fluid, Freezing Point Measurement Tester Meter Coolant Condition

$28.90 USD

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Phm-203 Chlorine Tester Ph & Cl2 Level Meter Test Monitor Swimming Pool Spa Water Monitor Quality

PHM-203 Chlorine Tester, PH & Chlorine Cl2 Level Meter Tester Test Monitor Swimming Pool Spa Water monitor Quality Analysis

$46.90 USD

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HTM - 238 HTM - 238 Handheld Digital Humidity & Temperature Meter 0~100% RH/ - 30~70°C ( - 22~158°F) LCD Display Backlight Moisture Thermo Hygrometer Thermometer Small Tester Gauge for Home Kitchen Indoor Outdoor - Gain Express

HTM-238 Handheld Digital Humidity & Temperature Meter 0~100% RH/ -30~70°C (-22~158°F) LCD Display Backlight Moisture Thermo Hygrometer Thermometer Small Tester Gauge for Home Kitchen Indoor Outdoor

$31.90 USD

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PHM - 245_US PHM - 245 PH & Temperature 2 - in - 1 Continuous Monitor Meter w/ Backlight Replaceable Electrode, Dual Display 0.00~14.00pH °C/ °F Water Quality Monitoring Kit, for Aquariums Hydroponics Pools Tanks Spa - Gain Express

PHM-245 PH & Temperature 2-in-1 Continuous Monitor Meter w/ Backlight Replaceable Electrode, Dual Display 0.00~14.00pH °C/ °F Water Quality Monitoring Kit, for Aquariums Hydroponics Pools Tanks Spa

$52.90 USD

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ORP - 228 ORP - 228 ORP Redox Meter Tester - 1999~1999mV, 1 - point Calibration, Oxidation Reduction Potential, Aquariums, Swimming Pools, Water Treatment Systems, Aquaculture, Spa - Gain Express

ORP-228 ORP Redox Meter Tester -1999~1999mV, 1-point Calibration, Oxidation Reduction Potential, Aquariums, Swimming Pools, Water Treatment Systems, Aquaculture, Spa

$37.90 USD

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ORP8552 ORP Meter Pen Type Redox 999mV Waterproof IP65 Digital Water Treatment Tester

For Bulk Order Only. Please Contact Us.

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SQM-255G Soil Moisture Meter Tester Probe Sensor (Green), Gardening Plants Growth Watering Quality Monitoring Test Tool Kits for Garden Farm Lawn Household Indoor Outdoor

For Bulk Order Only. Please Contact Us.

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HM-6561 Portable Digital Rebound Leeb Hardness Tester Gauge Meter

$348.90 USD

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$RES - 28ATC RES - 28ATC Salinity Refractometer 0 - 28% ATC, Sodium Chloride (NaCl) Salt Level Meter Tester, Test Kit for Sea Water Brine Seawater Food Industry Pickle Soy Sauce, ±0.2% Accuracy - Gain Express$

RES-28ATC Salinity Refractometer 0-28% ATC, Sodium Chloride (NaCl) Salt Level Meter Tester, Test Kit for Sea Water Brine Seawater Food Industry Pickle Soy Sauce, ±0.2% Accuracy

$28.90 USD

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7755_CD_ADAPTOR Carbon Dioxide (CO2) RH & Temperature Real-Time Air Quality Monitor with PC Software Recording Analyzer

$217.90 USD

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$CLMG - 7205 CLMG - 7205 Pocket Diffraction Grating Gemological Spectroscope Gem Stone Jeweller Tool with Pouch - Gain Express$

CLMG-7205 Pocket Diffraction Grating Gemological Spectroscope Gem Stone Jeweller Tool with Pouch

$44.90 USD

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$Rec-200Atc Tri Scale Clinical Refractometer With Atc 0~12G/100Ml Serum Protein 1~1.050 1.333 ~ 1.360$

REC-200ATC Tri Scale Clinical Refractometer with ATC 0~12g/100ml Serum protein, 1~1.050, 1.333 ~ 1.360 RI for Veterinary Dog Cat

$28.90 USD

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$Rebs-28Atc 2-In-1 Brix Salinity Refractometer Dual Scale 0-32% & 0-28% With Atc Sodium Chloride In$

REBS-28ATC 2-in-1 Brix Salinity Refractometer Dual Scale 0-32% Brix & 0-28% Salinity with ATC Sodium Chloride in Food Salt Seawater Brine Beer fruits Cutting Liquid

$18.90 USD

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$REB - 32SGATC REB - 32SGATC Beer Brix & Specific Gravity Refractometer with ATC Optic Dual Scale 0~32% Brix 1.000 - 1.120 SG Wine Wort Making Beer Brewing Fruit Juice Hops Sugar Homebrew Kit - Gain Express$