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GAIN EXPRESS HOLDINGS LIMITED
HK
12
YRS
Main categories: industrial Endoscope,PH meter,Refractometer,Fish Finder,Lux Meter
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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 PAR Meter Full-Spectrum Quantum PPFD Tester for Plant Photosynthetic Activity Measurement(OEM Packaging Available)
$57.83 - $64.25
/
piece
5 pieces
(Min. Order)
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
/
piece
1 piece
(Min. Order)
Quantum PAR Meter Photo Synthetically Active Radiation PPFD Tester for Plant Lighting Horticulture of Indoor & Outdoor Plants
$75.85 - $85.90
/
piece
1 piece
(Min. Order)
Pen type pH & Temperature Meter 0.00-14.00pH & 0.0-55.0degC High Accuracy ATC +/-0.1pH Water Tester (OEM packaging available)
$13.30
/
set
10 sets
(Min. Order)
Handheld MOISSANITE TESTER Portable Moissanite Tester /Selector + Tester UV Light 2pt Jewel Stone Tool Selector
$28.48 - $32.14
/
piece
1 piece
(Min. Order)
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
/
piece
5 pieces
(Min. Order)
Portable pH Controller Meter Tester with optional HI LO Action and Replaceable Electrode(OEM Packaging Service Available)
$44.40
/
set
10 sets
(Min. Order)
Multi-parameter 5-in-1 Water Quality Meter Wall-mountable PH EC CF TDS (ppm) Temperature Tester (OEM Packaging Available)
$43.46 - $48.29
/
set
1 set
(Min. Order)
Color-Screen Display Portable Paint Coating Thickness Gauge Meter High Definition Automotive Tester with Rechargeable Battery
$59.94 - $66.60
/
piece
1 piece
(Min. Order)
3-in-1 Digital EC / CF / TDS Meter Combo Water Quality Tester IP65 Waterproof Conductivity with ATC Aquarium, Hydroponic
$20.65 - $23.30
/
piece
1 piece
(Min. Order)
0~9999ppm Range Wall Mount Indoor Air Quality Monitor CO2 Meter Temperature RH Carbon Dioxide Tester (OEM Packaging Available)
$97.02 - $107.51
/
set
1 set
(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)
Digital Clamp Meter Multimeter DC AC Voltage Current Resistance Diode Continuity Tester
$24.08 - $27.17
/
piece
1 piece
(Min. Order)
6-in-1 Pen type pH Water Quality Meter Temperature Conductivity ORP TDS Salinity Tester with ORP probe(OEM packaging available)
$97.56 - $108.11
/
set
1 set
(Min. Order)
2-in-1 ORP Redox Temperature Thermometer Water Quality Meter Tester (OEM Packaging Available)
$19.20 - $22.00
/
set
20.0 sets
(Min. Order)
Portable pH Controller Meter Tester with optional HI/LO Action and Replaceable Electrode
$44.40
/
piece
10 pieces
(Min. Order)
20mL Salinity Meter NaCl 50 ppt Calibration Buffer Solution (Set of 2 Bottles) Seawater Tester Monitor Standard
$6.62 - $7.97
/
piece
1 piece
(Min. Order)
Antifreeze Refractometer Tester Meter Automotive Battery ATC 0~100%, Battery Fluid 1.10~1.40kg/l
$12.09
/
piece
10 pieces
(Min. Order)
Digital Dosimeter Logging Noise Dose Meter 60 - 130, 60 - 130dB (A and C) Sound Decibel Level Tester (OEM Packaging Available)
$207.78 - $237.90
/
set
1 set
(Min. Order)
Digital Automotive / Vehicular Auto Battery Tester with 6V and 12V Voltage Indicator
$19.11 - $21.57
/
piece
1 piece
(Min. Order)
Digital Hardness Meter Shore C 0-100HC Durometer Tester w/ Built-in Probe Microcomputer LSI Circuit (OEM Packaging Available)
$126.51 - $136.36
/
set
1 set
(Min. Order)
Ultrasonic Metal Steel Aluminum Glass Fiber Thickness Velocity Gauge Meter Tester with Backlight Internal Memory 100000 LCD
$139.35 - $150.20
/
piece
5 pieces
(Min. Order)
Digital Lux Meter Light Sensor Tester with Data Logging Function 0-200,000 Lux Range Detachable Sensor for Cinematography, Etc
$22.20 - $25.06
/
piece
5 pieces
(Min. Order)
Gloss Surface Reflection 0.1-200 GU Tester Meter 20deg 45deg 75deg for Ceramics Films Textiles Rechargeable Reflectometer Triple
$216.87 - $227.85
/
piece
1 piece
(Min. Order)
ORP-228 ORP Redox Meter Tester -1999~1999mV, 1-point Calibration, Oxidation Reduction Potential, Swimming Pools, Aquaculture
$13.53 - $15.27
/
piece
1 piece
(Min. Order)
Replaceable ORP Redox Electrode 0 ~ +/- 1999 mV ORP Meter Tester 300cm long Cable
$18.30 - $21.90
/
piece
1 piece
(Min. Order)
Redox Meter -1999mV~1999mV Millivolts Backlight LCD Pool Aquarium ORP Water Quality Digital Pen-type Tester
$12.06 - $14.51
/
piece
1 piece
(Min. Order)
Portable Solar Power Meter BTU W/M2 Radiation Energy Cell Tester Taiwan Made
$63.13 - $70.14
/
piece
1 piece
(Min. Order)
SRT-6223 Digital Surface Profile Gauge Roughness Tester Meter w/ 0~800 um Measuring Range
$226.67 - $258.90
/
piece
1 piece
(Min. Order)
3in1 Waterproof EC CF ppm Stick Meter Nutrient Water Quality Tester
$21.00
/
piece
10 pieces
(Min. Order)
4 Parameters Digital Roughness Tester (Ra, Rz, Rq, Rt)
$632.53 - $648.15
/
piece
1 piece
(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)
Digital Mini ORP REDOX Meter Tester 0 ~ +/-1999mV Range Electrode +/- 5mV Accuracy
$22.50
/
piece
5 pieces
(Min. Order)
Digital Thermo-Anemometer Wind Air Speed Meter Thermometer Temperature 0~45m/s Bar Graph Surf 2-in-1 Tester
$21.59
/
piece
5 pieces
(Min. Order)
Digital Hardness Meter Tester/ Shore C Durometer Sponge Foam with built-in Probe
$126.51 - $136.36
/
piece
1 piece
(Min. Order)
Pentype PH meter Temperature Tester w/ IP67 Waterproof ATC for Aquarium, Pool, Labs, Car Washes (OEM Packaging Available)
$18.11 - $20.44
/
set
1 set
(Min. Order)
3-in-1 Pentype EC, pH & Temperature Meter 0.01mS/cm Resolution ATC Water Quality Tester (OEM Packaging Available)
$21.08
/
set
10 sets
(Min. Order)
86031 6-in-1 Digital IP67 Combo Water Quality Tester pH Temperature Conductivity TDS Salt DO Tester (OEM Packaging Available)
$185.00 - $229.00
/
set
10 sets
(Min. Order)
3-in-1 Digital EC / CF / TDS Meter Combo Water Quality Tester IP65 Waterproof Conductivity with ATC (OEM packaging available)
$20.65 - $23.30
/
set
1 set
(Min. Order)
Waterproof Soil EC and Temperature Meter Digital Tester with ATC for Potted Plants Gardening Agriculture Farm
$19.32 - $21.80
/
piece
5 pieces
(Min. Order)
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