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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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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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ECM-302 Pentype 2-in-1 TDS / EC Meter with ATC Digital Water Quality Tester(OEM packaging available)
$4.84
/
piece
20 pieces
(Min. Order)
Pentype EC Meter Conductivity Tester 0~19.9EC Range Factory Calibrated
$8.59 - $8.60
/
piece
100.0 pieces
(Min. Order)
Pen-Type 3-in-1 pH Temperature Conductivity EC Meter Tester 19.99 mS/cm, 0.01mS/cm Resolution (OEM Packaging Available)
$18.20 - $20.90
/
set
20.0 sets
(Min. Order)
pH / EC / Temperature Meter ATC 3 in 1 Waterproof Combo Multi-Parameter Tester Pool Spa Drinking Purity
$15.80 - $17.83
/
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)
pH / EC / Temperature Meter ATC 3 in 1 Waterproof Combo Multi-Parameter Tester Pool Spa Drinking Purity(OEM packaging available)
$15.80 - $17.83
/
set
1 set
(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)
6-in-1 Smart Water Quality Meter pH / EC / TDS / Salinity / SG / Temperature with Easy Calibration 24Hrs Online APP Monitoring
$29.76 - $33.59
/
piece
5 pieces
(Min. Order)
Portable Digital TDS/EC/TEMP Water Quality Meter 0-10000ppm/0-20000us/cm Range IP65 (OEM Packaging Available)
$5.84 - $5.85
/
piece
100.0 pieces
(Min. Order)
TDS/EC/TEMP Water Quality Meter 0-10000ppm/0-20000us/cm Range w/ Backlight (OEM Packaging Available)
$6.69 - $6.70
/
piece
100.0 pieces
(Min. Order)
NEW Pentype 7-in-1 PH Meter TDS/EC/ORP/Salinity/S.G./Temp. Tester For Drinking Water, Aquariums, Pool (OEM Packaging Available)
$15.02 - $16.95
/
piece
5 pieces
(Min. Order)
Smart Water Quality Meter 6-in-1 pH / EC / TDS / Salinity / SG / Temperature Online APP Monitoring (OEM Packaging Available)
$29.76 - $33.59
/
piece
5 pieces
(Min. Order)
3-in-1 Conductivity EC & pH & Temperature Meter Multi-parameter Tester Calibration Kit 0.01mS/cm Resolution
$21.08
/
piece
10 pieces
(Min. Order)
6 in 1 Multi-parameter pH/ ORP/ EC/ CF/ TDS PPM/ Temperature Combo Testing Meter Water Quality Meter (OEM Packaging Available)
$58.89
/
set
5 sets
(Min. Order)
Digital 3-in-1 pH, EC & TDS Conductivity Monitor w/ 3.5" Large Dual Display, for Aquaculture, Aquarium, Pond, Hydroponics
$49.90 - $57.80
/
piece
15.0 pieces
(Min. Order)
3-in-1 pH, EC & TDS Conductivity Monitor ATC, Digital Water Quality Meter Tester Multi-Parameter, 3.5" Large Dual Display
$49.90 - $57.80
/
piece
15 pieces
(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)
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)
Digital Pentype pH Meter 7-in-1 PH / TDS / EC / ORP / Salinity / S.G. / Temperature Meter for Drinking Water, Aquariums, Pool
$15.02 - $16.95
/
piece
5 pieces
(Min. Order)
3-in-1 pH, EC & TDS Conductivity Monitor Water Quality Meter for Aquaculture, Aquarium, Hydroponics(OEM Packaging Available)
$49.90 - $57.80
/
set
15 sets
(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)
Smart Water Quality Tester PH/ ORP/ EC/ Free Chlorine/ Salinity/ Temperature, 6-in-1 Floating Tester (OEM Packaging Available)
$29.84 - $33.67
/
piece
5 pieces
(Min. Order)
TDS / EC Meter 2-in-1 Pentype Digital Water Quality Tester with ATC Temperature Measurement for Water Analysis Hydroponics
$4.50
/
piece
20 pieces
(Min. Order)
pH Meter Digital 6 IN 1 Floating Monitor EC / Salinity / pH / ORP / Temperature / Chlorine Smart Meter Tester With Bluetooth
$29.50 - $33.29
/
piece
5 pieces
(Min. Order)
6-in-1 Pen type Water Quality Tester Multi-Parameter pH meter Temp. EC ORP TDS SAL Optional ORP Probe(OEM available)
$73.17 - $81.08
/
set
1 set
(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)
5-in-1 Water Quality Multi-parameter Wall-mountable PH EC CF TDS (ppm) Temperature Test Meter Backlight Pond Drinking
$43.46 - $48.29
/
piece
1 piece
(Min. Order)
Online PH/EC Conductivity Monitor Meter Tester ATC, Wall Mountable & Rechargeable, Water Quality Real-time Continuous Monitoring
$20.70 - $23.36
/
piece
1 piece
(Min. Order)
5-in-1 Water Quality Multi-parameter PH EC CF TDS (ppm) Temperature Fish Tank Pond Drinking Test Meter Backlight Rechargeable
$43.46 - $48.29
/
piece
1 piece
(Min. Order)
Online PH & EC Conductivity Monitor Meter Tester ATC, Water Quality Real-time Continuous Monitoring, Aquarium, Pond, Hydroponic
$21.05 - $23.76
/
piece
1 piece
(Min. Order)
Online PH/EC Monitor Meter Tester ATC Multi Parameter Water Quality Rechargeable Real-time Monitoring (OEM Packaging Available)
$20.70 - $23.36
/
set
1 set
(Min. Order)
3in1 Waterproof EC CF ppm Stick Meter Nutrient Water Quality Tester
$21.00
/
piece
10 pieces
(Min. Order)
Multi-parameter Water Quality Monitor with 6 in 1 pH Temperature EC TDS meter tester wall mount type(OEM Packaging Available)
$58.50
/
set
30 sets
(Min. Order)
Pentype Digital Conductivity Sensor Meter Water Quality Tester Pocket Size With ATC Factory Calibrated for Pools, Spas, Aquarium
$6.60 - $7.80
/
piece
40.0 pieces
(Min. Order)
3 in 1 Waterproof EC CF ppm Stick Meter Nutrient Water Quality Tester(OEM Packaging Service Available)
$21.00
/
set
10 sets
(Min. Order)
pH TDS EC Temperature 4 in 1 Multifunctional Digital Portable Water Quality Meter with Backlight
$15.38 - $20.00
/
piece
1 piece
(Min. Order)
Handheld High Accuracy Portable 3-in-1 Digital Pen-type Water Quality Conductivity TDS Meter, ppm ppt uS mS C/F
$22.71
/
piece
50 pieces
(Min. Order)
5-in-1 Multi-Parameter Pentype Water Quality Tester (pH / TDS / EC / Temp / Salinity) Waterproof Digital Meter for Lab Household
$25.14 - $28.37
/
piece
1 piece
(Min. Order)
GAINEXPRESS 8-in-1 Water Test Kit pH. ORP. EC Conductivity, TDS, Salt, S.G., CF, and Temperature with Online APP Tester
$41.52 - $46.14
/
piece
5 pieces
(Min. Order)
3-008R TDS EC Temperature 3-in-1 Portable Digital Water Quality Meter with Backlight
$2.30 - $2.73
/
piece
1 piece
(Min. Order)
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