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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
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30x Gem Loupe Magnifiers Jeweler 20.5mm Triplet Lens Coin Mechanics Machinists Optical Magnification
$6.27 - $7.55
Shipping: $14.00/piece
Min. Order: 2 pieces
Add to cart
AQM-338 Portable Tester Hydrogen Sulfide Detector H2S Monitor 0~100ppm Electrochemical H2S Sensor with LCD Screen Backlight
$30.02 - $33.88
Shipping: $14.95/piece
Min. Order: 5 pieces
Add to cart
All-in-1 Accurate Mountable Indoor Air Quality Monitor, Real-time CO2 & Temperature & Humidity Level with Visual & Alarm
$120.73 - $133.78
Shipping: $16.14/piece
Min. Order: 5 pieces
Add to cart
Portable/Wallmount Digital 4 Channel -328~2498 degree F/C K Type Thermocouple 2GB SD Card Temperature Thermometer Logger
$85.32 - $94.54
Shipping: $31.80/piece
Min. Order: 1 piece
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Indoor Air Quality Monitor All-in-1 CO2 & Temperature & Humidity Level Meter Mountable w/ NDIR Sensor (OEM Packaging Available)
$120.73 - $133.78
Shipping: $16.14/set
Min. Order: 5 sets
Add to cart
Dual Differential Manometer Gas Pressure Tester Meter, Backlight 12 Selectable Units Air Pressure Gauge W/ Data Storage Function
$32.50 - $36.11
Shipping: $7.46/piece
Min. Order: 5 pieces
Add to cart
Soil pH, Moisture & Light Meter 3 Way Tester Kit (Green) for Garden Farm Lawn Household Indoor Outdoor Gardening
$2.97 - $3.58
Shipping: $7.46/piece
Min. Order: 5 pieces
Add to cart
3 Way Tester Soil pH, Moisture & Light Meter Kit (Green), Gardening Acidity Probe Test Tool Household Indoor Outdoor
$2.41 - $2.90
Shipping: $7.46/piece
Min. Order: 5 pieces
Add to cart
Magnetic Mini Voice Activated Recorder 64GB Recording Device with Speaker 192kbps Sound Quality Long-Lasting Battery for Car Lec
$17.19
Shipping to be negotiated
Min. Order: 30 pieces
Digital Force Meter 1K Gauge Pull & Push Magnitude Test Tester Newton meter Newton N / kg / lb / g Measurement
$120.48 - $129.87
Shipping: $37.30/piece
Min. Order: 1 piece
Add to cart
Jewelry Loupe 20X Optical Magnifier 21mm 6 LED Light & UV Light Arts & Crafts Machinist Magnification (OEM Packaging Available)
$11.08 - $13.33
Shipping: $14.00/set
Min. Order: 2 sets
Add to cart
Digital Hardness Meter Shore C 0-100HC Durometer Tester w/ Built-in Probe Microcomputer LSI Circuit (OEM Packaging Available)
$126.51 - $136.36
Shipping: $31.80/set
Min. Order: 1 set
Add to cart
2-in-1 LUCKY Fish Finder 328ft/100m Wireless Coverage Waterproof Design 6M Wired 100M Depth Capability (OEM Packaging Available)
$76.50 - $86.90
Shipping: $37.30/set
Min. Order: 1 set
Add to cart
Pentype PH meter Temperature Tester w/ IP67 Waterproof ATC for Aquarium, Pool, Labs, Car Washes (OEM Packaging Available)
$18.11 - $20.44
Shipping: $28.00/set
Min. Order: 1 set
Add to cart
Digital Paint Coating Portable Thickness Meter 0-1000um /0-40mil Range Magnetic Induction Eddy Current (OEM Packaging Available)
$138.55 - $149.35
Shipping: $31.80/set
Min. Order: 1 set
Add to cart
Wall-mounted Electronic Water Level Alarm with Power Lamp & Level line Indicator Groove Fences Decks Cabinets Framing Leveling
$6.92 - $8.32
Shipping: $28.00/piece
Min. Order: 1 piece
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