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GAIN EXPRESS HOLDINGS LIMITED
HK
12YRS
Main categories: industrial Endoscope,PH meter,Refractometer,Fish Finder,Lux Meter
Top picks

Product categories

300cm long Cable ORP Electrode for ORP Meter Tester Controller (OEM packaging available)
$17.16 - $19.37
(Min. Order) 1 set
20x Magnification 20.5mm Jeweler Gem Loupe Triplet Lens Jewelry Optical Hobbyist Stamp & Coin (OEM Packaging Available)
$6.14 - $7.39
(Min. Order) 2 sets
3-in-1 Automotive Antifreeze Refractometer 1.100 - 1.400kg/l System Coolant Freezing Point (OEM Packaging Available)
$9.05 - $10.88
(Min. Order) 1 set
Gloss Surface Meter 0.1-200 GU Tester Meter 20deg 45deg 75deg for Ceramics Films Textiles Rechargeable Reflectometer Triple
$216.87 - $227.85
(Min. Order) 1 piece
3-in-1 Digital EC / CF / TDS Meter Combo Water Quality Tester IP65 Waterproof Conductivity with ATC (OEM packaging available)
$20.65 - $23.30
(Min. Order) 1 set
Greenhouse CO2 Controller w/ 4.5 Meters Remote CO2 Sensor Auto Detect Day Night Function Perfect for Grow Rooms, Home, Offices
$93.90 - $108.90
(Min. Order) 1 set
23 orders
Digital CO2 IAQ Monitor Controller 45M Cable NDIR Sensing Probe w/ Relay Function Green House Home, Office, Factory
$93.90 - $108.90
(Min. Order) 1 piece
CO2 Carbon Dioxide Monitor & Controller (Relay Function) w/ Remote Sensor for Home, Office, Hospital (OEM Packaging Available)
$93.90 - $108.90
(Min. Order) 1 piece
5 orders
Refractometers
All products
Refractometers
Customizable
Ready to Ship
Automotive Car Refractometer ATC for Adblue
$8.70 - $9.31
Shipping: $4.95/set
Min. Order: 30 sets
Add to cart
New Design Salinity Refractometer /0-10% with ATC Aquarium Salt Hydrometer + Built-in Calibration Knob
$15.42
Shipping to be negotiated
Min. Order: 35 pieces
Handheld Clinical Refractometer with ATC for Human Wrestlers Tri Scale Blood Serum Protein/ Urine / RI
$8.64 - $10.40
Shipping: $28.00/piece
Min. Order: 1 piece
Add to cart
0-32% Brix Refractometer ATC High-Concentrated Sugar Solution Content Test Tool 0.2% Division, Homebrew Tester Meter
$8.64 - $10.40
Shipping: $28.00/piece
Min. Order: 1 piece
Add to cart
Tri-Scale Refractometer ATC Brix 0-10%/ Salinity 0-100PPT/ Specific Gravity 1.000-1.070, for Saltwater Brackish Marine Reef
$8.84 - $10.64
Shipping: $28.00/piece
Min. Order: 1 piece
Add to cart
0-10% Brix Refractometer with ATC Low-Concentrated Sugar Content Solutions 0.1% Accuracy Synthetic Machining Maple Sap
$8.64 - $10.40
Shipping: $28.00/piece
Min. Order: 1 piece
Add to cart
3-in-1 Honey Refractometer Brix/Moisture/Baume Tester Meter ATC, Tri-Scale 58-90%/12-27%/38-43Be', Sugar Water Content Level
$11.46 - $13.78
Shipping: $7.46/piece
Min. Order: 5 pieces
6 recent viewed
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Alcohol Refractometer with ATC 0~80% VOL Volume, Optical Handheld Concentration Tester Meter for Distilled Beverages Making
$8.84 - $10.64
Shipping: $28.00/piece
Min. Order: 1 piece
Add to cart
Grape Fruit Juice Alcohol Refractometer with ATC for Sugar Glucose Wine Making Winemakers Dual Scale 0-25% VOL 0-40% Brix
$8.64 - $10.40
Shipping: $28.00/piece
Min. Order: 1 piece
Add to cart
Beer Brix & Specific Gravity Refractometer with ATC Optic Dual Scale 0~32% Brix 1.000-1.120 SG Fruit Juice Sugar
$8.64 - $10.40
Shipping: $28.00/piece
Min. Order: 1 piece
Add to cart
3-in-1 Battery Automotive Antifreeze Refractometer, Battery Charge Test Cooling System Coolant Freezing Point
$9.05 - $10.88
Shipping: $28.00/piece
Min. Order: 1 piece
Add to cart
6-in-1 Automotive Car Refractometer ATC for Adblue/ Antifreeze/ Battery Acid/ Windshield Fluid Propylene Ethylene Glycol
$8.64 - $10.40
Shipping: $28.00/piece
Min. Order: 1 piece
Add to cart
5-in-1 Automotive Battery Antifreeze Refractometer ATC Freezing Point Measurement Tester Meter Coolant Condition
$8.64 - $10.40
Shipping: $28.00/piece
Min. Order: 1 piece
Add to cart
Antifreeze Refractometer Tester Meter Automotive Battery ATC 0~100%, Battery Fluid 1.10~1.40kg/l
$12.09
Shipping to be negotiated
Min. Order: 10 pieces
Handheld Traditional Salinity Refractometer 0-10% ATC NaCI Durable Heavy duty Aquarium Salt Water
$11.29
Shipping to be negotiated
Min. Order: 100 pieces
New Design Blood Plasma Serum Protein Clinical Veterinary Urine Refractometer Built-in ATC
$17.63
Shipping to be negotiated
Min. Order: 10 pieces