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GAIN EXPRESS HOLDINGS LIMITED
HK
12
YRS
Main categories: industrial Endoscope,PH meter,Refractometer,Fish Finder,Lux Meter
Contact supplier
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Top picks
Product categories
NEW ARRIVALS
Air Quality Meters
Automotive Testing Equipment
Water Quality Meters
Fishing Tackles/Gears
Dental Loupe
Gemological Instruments / Jeweler Tools
Health, Fitness & Sports
Inspection Cameras / Endoscopes / Borescopes
Microscopes / Ring Lights / Illuminators
Multimeters / Clamp Meters
Measuring Instruments
OEM Products
Ozone Generator
Refractometers
Tension Tester
Water Level Alarm
Weather Station
Ungrouped
High Sensitivity Handheld Precision Combustible Methane Propane Gas Leak Detector Alarm Sensor 40-640ppm Range
$61.83
/
piece
50 pieces
(Min. Order)
Brix Refractometer ATC High-Concentrated Sugar Solution Content Test 0-32% Homebrew Tester Meter (OEM Packaging Available)
$8.64 - $10.40
/
set
1 set
(Min. Order)
6 in 1 Professional Multi-parameter Water Quality Monitor Tester pH/ ORP/ EC/ CF/ TDS PPM/ Temperature Combo Testing Meter
$62.16
/
piece
5 pieces
(Min. Order)
6 in 1 Professional Multi-parameter Digital Multi-function Water Quality Monitor Tester pH/ ORP/ EC/ CF/ TDS PPM/ Temperature
$62.16
/
piece
5 pieces
(Min. Order)
Portable Film Coating Thickness Gauge Tester Meter 0~1.80mm/0-~71.0 mil Non-magnetic Coat (OEM Packaging Available)
$13.54
/
set
10 sets
(Min. Order)
Portable Film Coating Thickness Gauge Tester Meter, Automotive Car Nondestructive, Car Trading, Inspection, Non-magnetic Coat
$13.54
/
piece
10 pieces
(Min. Order)
Soil PH, Moisture & Light Meter for Garden Farm Lawn Household Indoor Outdoor (Silver)
$3.74
/
piece
20 pieces
(Min. Order)
Soil pH, Moisture & Light Meter 3 Way Tester Kit Plants Growth Watering Quality Monitoring Checker Gardening Acidity Probe Test
$3.51
/
piece
20 pieces
(Min. Order)
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Digital Non-Invasive Inductive LED 4-in-1 Tester Wood Drywall Masonry Moisture Meter
$15.71 - $17.80
/
piece
1 piece
(Min. Order)
USB HD 8.5mm Camera Video Inspection Borescope 6 LED Light Endoscope Tape Style Scope SnakeScope
$29.11 - $32.86
/
piece
1 piece
(Min. Order)
30x Magnifying 21mm Triplet Optical Glass LED Light Jeweler Loupe Gem Gemstone Identifier Tool
$10.13 - $12.19
/
piece
1 piece
(Min. Order)
100V~240V Cold LED Dual Gooseneck Lights Microscope Illuminator Illumination with Dimmer Adjustable Brightness
$40.86 - $45.40
/
piece
1 piece
(Min. Order)
10x Jeweler Loupe Magnifier + LED & UV light, 21mm lens Jewelry Identifier Tool
$10.00 - $12.03
/
piece
1 piece
(Min. Order)
Magnification Jeweler Loupe Magnifier Glass 10x 25mm with Glass Reticle Scale Chart 20mm & 8 LED Light
$17.73 - $20.01
/
piece
1 piece
(Min. Order)
Desktop Standing Polariscope Built-in LED Rotatable Platform 2 Glass Filter
$65.00 - $72.22
/
piece
1 piece
(Min. Order)
LUCKY Underwater Camera Fish Locator Finder 120deg Wide Angle 20M Cable Length 4 IR LED 4.3" Display Video Photo Capture
$79.00 - $91.90
/
piece
2 pieces
(Min. Order)
Gem Refractometer w/ Built-in LED Light + RI Oil Gemstone Identifier Tester Jewelry Tool
$48.21 - $53.57
/
piece
1 piece
(Min. Order)
10x Magnification Foldable Triplet Optic Lens Jeweler Loupe Magnifier + 6 LED light, 21mm lens
$9.03 - $10.86
/
piece
5 pieces
(Min. Order)
Digital PAR Meter Full-Spectrum Quantum PPFD Tester for Plant Photosynthetic Activity Measurement(OEM Packaging Available)
$57.83 - $64.25
/
piece
5 pieces
(Min. Order)
Transmitter Pressure & Vaccum System Locator Detects Air Water Dust Leaks & Ultrasonic Leak Detector
$28.47
/
piece
100 pieces
(Min. Order)
NEW Handheld Dark Field 10x Magnification Power Loupe Gem Gemstone Gemology Tester with 18mm Diameter Viewing Lens
$13.92 - $15.71
/
piece
1 piece
(Min. Order)
15x 21mm Optic Glass Loupe 6 LED & UV Light Magnifier Jeweler Mechanics Photographer Foldaway Pocket Black Frame
$10.82 - $13.02
/
piece
1 piece
(Min. Order)
20X Jeweler Loupe Magnifier + LED & UV light 21mm Lens Jewel Identifier Tool
$10.91 - $13.13
/
piece
1 piece
(Min. Order)
Lucky Underwater Fishing Camera Fish Finder Camera with Infrared Lights for Ice,Sea Fishing(OEM packaging service available)
$79.10 - $91.90
/
set
2 sets
(Min. Order)
LUCKY Wired Fishfinder 100M (328ft) Depth Detection Portable Fish Finder w/ Clear LED (OEM Packaging Available)
$23.80 - $26.86
/
set
1 set
(Min. Order)
20x Magnifying Optical Glass LED Light Jeweler Loupe
$12.94
/
piece
10 pieces
(Min. Order)
30X Jeweler Loupe Magnifier + LED & UV light 21mm lens Jewel Identifier Tool
$10.91 - $13.13
/
piece
1 piece
(Min. Order)
48 LED Microscope Ring Light 43mm-151mm Light Range Illuminator Illumination Lamp Camera with Adjustable Brightness
$44.89 - $49.88
/
piece
1 piece
(Min. Order)
Brake Fluid Tester Detector w/ LED Indicator & 180degree Foldable Testing Rod Car Automotive Driving Safety Check Analyzer
$17.59 - $19.86
/
piece
1 piece
(Min. Order)
10x 21mm Loupe Jeweler Magnifier LED UV Light Triplet Lens Achromatic Aplanatic Foldaway Magnifying Gem Optical Tool
$10.17 - $12.23
/
piece
1 piece
(Min. Order)
Handheld 20xMagnifying Glass LED Light Jewelry loupe (OEM packaging available)
$12.94
/
set
10 sets
(Min. Order)
Ultrasonic Leakage Detector ULD-586 Frequency Response 20 KHz to 100 Khz(OEM packaging service available)
$130.00 - $175.00
/
set
1 set
(Min. Order)
LUCKY Wired Fishfinder w/ Alarm 100M (328ft) Depth Detection Portable Fish Finder w/ Clear LED Backlight for Night Fishing
$23.80 - $27.90
/
piece
1 piece
(Min. Order)
USB Video Inspection Borescope Endoscope/ 830mm Flexible Tube 7mm Waterproof Camera Head with 7 inch Android Monitor
$138.55 - $149.35
/
piece
1 piece
(Min. Order)
20X Magnification Foldable Foldaway Jeweler Loupe Magnifier + 6 LED light + 21mm Triplet Optical Glass Lens
$10.13 - $12.19
/
piece
1 piece
(Min. Order)
Four Zone Control Ring Light 62mm 72 LED Microscope Camera Illuminator Flash Lens
$44.89 - $49.88
/
piece
1 piece
(Min. Order)
Surgical LED Head Dentist Loupes 50000 Lux Medical Lamp Binocular Dental Light
$192.77 - $202.53
/
piece
1 piece
(Min. Order)
Digital pH ORP Redox 2 in 1 Controller Monitor w/ Output Power Relay Control Water Quality Meter Measurement 110V or 220V
$72.08 - $80.04
/
piece
1 piece
(Min. Order)
Digital Moisture Meter Checks 36 Species Grain Seed Rice Coffee Wheat Tester 50% LED Indicator
$115.85 - $128.38
/
piece
1 piece
(Min. Order)
Automotive Cable Wire Tracker Short & Open Circuit Finder Tester Car Repair Tracer Tool 6-42V DC
$16.67 - $18.43
/
piece
1 piece
(Min. Order)
Portable Desktop LED light for Polariscope / Darkfield Loupe
$7.70
/
piece
10 pieces
(Min. Order)
20x Loupe 21mm Optical Glass Magnifier 6 LED Light & UV Light Magnification Hobbyist Coin Collector Arts & Crafts Machinist
$11.08 - $13.33
/
piece
2 pieces
(Min. Order)
CL-400 HandHeld 400x Magnification Fiber Optical Inspection Microscope + 2.5 & 1.25mm
$44.67 - $49.63
/
piece
1 piece
(Min. Order)
Dental Surgical LED Head Light Lamp Dentist High Quality 143cm Cable Length + Rechargeable Battery (OEM Packaging Available)
$202.53
/
set
1 set
(Min. Order)
30X Jewel Identifier Tool Magnifier + LED & UV light 21mm lens (OEM packaging available)
$10.91 - $13.13
/
set
2 sets
(Min. Order)
Handheld Polariscope LED flashlight Jewellery Gems Gemstone tools 80mm Length
$16.46 - $18.57
/
piece
1 piece
(Min. Order)
10x Foldaway Magnifying Glass Magnification + LED & UV light Jeweler Loupe Magnifier 21mm lens(OEM packaging available)
$10.00 - $12.03
/
set
2 sets
(Min. Order)
Jeweler Loupe 30x Magnifying 21mm Triplet Optical LED Light Gemstone Identifier Tool (OEM Packaging Available)
$10.13 - $12.19
/
set
2 sets
(Min. Order)
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