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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
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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Made in Taiwan/Digital 6-in-1 MultiFunction Pentype Water Quality Meter pH Temperature Conductivity TDS Salt Tester optional ORP
$73.17 - $81.08
Shipping: $31.80/piece
Min. Order: 1 piece
2 sold
Add to cart
6 in 1 Multi-parameter pH/ ORP/ EC/ CF/ TDS PPM/ Temperature Combo Testing Meter Water Quality Meter (OEM Packaging Available)
$58.89
Shipping to be negotiated
Min. Order: 5 sets
Pentype Digital PH & Temperature 0.00-14.00 pH Range Water Quality Meter Kit W/ ATC for Lab, Spas, Pool
$13.30
Shipping to be negotiated
Min. Order: 10 pieces
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
Shipping to be negotiated
Min. Order: 15 pieces
6-in-1 Smart Water Quality Meter pH / EC / TDS / Salinity / SG / Temperature with Easy Calibration 24Hrs Online APP Monitoring
$29.76 - $33.59
Shipping: $16.14/piece
Min. Order: 5 pieces
Add to cart
3-in-1 pH, EC & TDS Conductivity Monitor Water Quality Meter for Aquaculture, Aquarium, Hydroponics(OEM Packaging Available)
$49.90 - $57.80
Shipping to be negotiated
Min. Order: 15 sets
Digital TDS/EC/TEMP Water Quality Meter 0-10000ppm/0-20000us/cm Range IP65 (OEM Packaging Available)
$5.84 - $5.85
Shipping to be negotiated
Min. Order: 100 pieces
3-007R TDS EC Temperature 3-in-1 Portable Digital Water Quality Meter with Aluminium Titanium Alloy Probe
$1.88 - $3.78
Shipping to be negotiated
Min. Order: 5 pieces
TDS/EC/TEMP Water Quality Meter 0-10000ppm/0-20000us/cm Range w/ Backlight (OEM Packaging Available)
$6.69 - $6.70
Shipping to be negotiated
Min. Order: 100 pieces
Pocket Size 0.0-14.0 pH Meter Digital Water Quality Tester Pen Type Household Drinking Water, Swimming Pools +/- 0.1pH
$6.59
Shipping to be negotiated
Min. Order: 100 pieces
Smart Water Quality Meter 6-in-1 pH / EC / TDS / Salinity / SG / Temperature Online APP Monitoring (OEM Packaging Available)
$29.76 - $33.59
Shipping: $16.14/piece
Min. Order: 5 pieces
Add to cart
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
Shipping: $31.80/set
Min. Order: 1 set
1 sold
Add to cart
Multi-parameter 5-in-1 Water Quality Meter Wall-mountable PH EC CF TDS (ppm) Temperature Tester (OEM Packaging Available)
$43.46 - $48.29
Shipping: $31.80/set
Min. Order: 1 set
Add to cart
2-in-1 ORP Redox Temperature Thermometer Water Quality Meter Tester (OEM Packaging Available)
$19.20 - $22.00
Shipping to be negotiated
Min. Order: 20 sets
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
Shipping: $37.30/piece
Min. Order: 1 piece
Add to cart
IP65 Water Quality Meter Pocket Size TDS Salinity Temperature Tester Digital Salt Tester LCD Display w/ ATC
$21.47 - $24.23
Shipping: $28.00/piece
Min. Order: 1 piece
Add to cart
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