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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
Featured products
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
Shipping to be negotiated
Min. Order: 1 set
23 orders
Diamond Moissanite Tester Gemstone 2pt Jewel Stone Combo Gem Test Jewelry Identifier Tool Equipment
$73.75 - $81.94
Shipping to be negotiated
Min. Order: 2 pieces
8 orders
Digital Waterproof USB Humidity Temperature and Pressure Data Logger gauge, generate PDF/Excel report(OEM packaging available)
$43.75 - $48.61
Shipping to be negotiated
Min. Order: 1 set
Digital PAR Meter Full-Spectrum Quantum PPFD Tester for Plant Photosynthetic Activity Measurement(OEM Packaging Available)
$57.83 - $64.25
Shipping to be negotiated
Min. Order: 5 pieces
10 orders
Water Activity Meter Food Water Activity Analyzer for Food Dried Fruit Grain Vegetable AW Monitor (OEM Packaging Available)
$325.30 - $341.77
Shipping to be negotiated
Min. Order: 1 set
LUCKY FF918-CWLS Color Display Bait Boat Fish Finder with 300m/980ft Wireless Operating Range(OEM Packaging Available)
$99.45 - $115.90
Shipping to be negotiated
Min. Order: 1 set
6 orders
Digital Carbon Dioxide Temperature Humidity CO2 Monitor WB DP Tester Handheld CO2 Meter (OEM Packaging Service Available)
$93.50 - $103.90
Shipping to be negotiated
Min. Order: 1 set
Sound Level Meter
Digital Sound Level Meter Calibrator 94dB & 114dB for 1/2" and 1" inch Microphone Portable w/ Backlight Calibration Tool
$78.05 - $86.49
Shipping to be negotiated
Min. Order: 1 piece
Digital
MAN-45 Professional Digital Manometer +/-13.78kPa +/-2PSI Suitable for 1-1 pipes,Ventilation,Air Condition System 11 units
$20.61 - $23.26
Shipping to be negotiated
Min. Order: 1 piece
Digital Battery Capacity Tester Volt Checker Load Analyzer Display Check AAA AA C D 9V 3.7V 1.5V Button Cell Household
$1.25 - $1.50
Shipping to be negotiated
Min. Order: 5 pieces
Handheld Par Meter PPFD Tester Up to 3999umol/(m2s) Measurement For for Green House and Led Grow Lights (OEM Packaging Available
$75.85 - $85.90
Shipping to be negotiated
Min. Order: 1 piece
7 orders
2-in-1 Digital Angle Finder Meter Protractor Ruler 360 degree 600mm (300mm per arm) + Stable Locking Function
$15.51 - $17.50
Shipping to be negotiated
Min. Order: 1 piece
Smart Food Thermometer W/ Bluetooth Function 98.42Ft. Range for Oven, Grill, Kitchen, BBQ, Meat IP67 (OEM Packaging Available)
$26.25 - $29.62
Shipping to be negotiated
Min. Order: 5 pieces
300cm Cable for PH Meter 0-14 Range pH Electrode Probe BNC Connector Monitor Controller Test Sensor (OEM packaging available)
$8.42 - $10.13
Shipping to be negotiated
Min. Order: 1 set
Digital Level Box Angle Finder with 4 Sides Magnetic Base Inclinometer & Large LCD Display IP54 Waterproof Level
$13.97 - $16.90
Shipping to be negotiated
Min. Order: 1 set
NEW Handheld Pocket-size Socket Tester Receptacle Detector Indicator W/ Red Light for Household Safety (OEM Packaging Available)
$5.66 - $6.81
Shipping to be negotiated
Min. Order: 5 pieces