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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
Water Quality Meters
All products
Water Quality Meters
Customizable
Ready to Ship
pH Electrode Probe BNC Connector 200cm Long Cable for PH Meter Monitor Controller Test Sensor, Replaceable for Aquarium, Spa
$4.81 - $5.79
Shipping: $28.00/piece
Min. Order: 1 piece
Add to cart
ORP REDOX Electrode 50 OHM BNC Type Connector for ORP Meter Tester Monitor Controller -2000~2000mV Measure w/ 200cm
$7.31 - $8.80
Shipping: $28.00/piece
Min. Order: 1 piece
Add to cart
PH ORP Controller with Monitoring and Dosing pH Meter Redox Temp Tester Wireless App Remote Online Monitor
$46.54 - $51.71
Shipping: $19.89/piece
Min. Order: 5 pieces
Add to cart
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
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
Shipping: $6.36/piece
Min. Order: 5 pieces
Add to cart
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
Shipping: $14.95/piece
Min. Order: 5 pieces
Add to cart
Smart Mini WIFI 5-in-1 Water Quality Tester pH/TDS/SALT/S.G. & Temp Meter TUYA Smart App for Aquarium Hydroponics Pool Aqua
$25.22 - $28.46
Shipping: $11.34/piece
Min. Order: 5 pieces
Add to cart
pH Meter Digital 6 IN 1 Floating Monitor EC / Salinity / pH / ORP / Temperature / Chlorine Smart Meter Tester With Bluetooth
$29.50 - $33.29
Shipping: $10.14/piece
Min. Order: 5 pieces
Add to cart
Water Quality Tester 4-in-1 TDS Temperature S.G Salt Salinity Meter with ATC for Testing Drinking Water, Aquaculture, Aquarium
$9.38 - $11.28
Shipping to be negotiated
Min. Order: 5 pieces
20mL Salinity Meter NaCl 50 ppt Calibration Buffer Solution (Set of 2 Bottles) Seawater Tester Monitor Standard
$6.62 - $7.97
Shipping: $28.00/piece
Min. Order: 1 piece
Add to cart
ORP Buffer Powder Calibration solution 256mV for ORP meter Tester ORP standard buffer solution (OEM Packaging Available)
$1.73 - $2.27
Shipping: $28.00/set
Min. Order: 1 set
Add to cart
Optional ORP electrode for M0199720
$25.32 - $28.57
Shipping: $7.46/piece
Min. Order: 5 pieces
Add to cart
2 in 1 Digital pH and ORP Controller with Separate Relays Calibration Solution Replaceable Electrode BNC Type Probe
$75.88
Shipping to be negotiated
Min. Order: 10 pieces
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
Portable pH Controller Meter Tester with optional HI/LO Action and Replaceable Electrode
$44.40
Shipping to be negotiated
Min. Order: 10 pieces
Pentype EC Meter Conductivity Tester 0~19.9EC Range Factory Calibrated
$8.59 - $8.60
Shipping to be negotiated
Min. Order: 100 pieces
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