GAIN EXPRESS HOLDINGS LIMITED

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GAIN EXPRESS HOLDINGS LIMITED

9YRS

Hong Kong S.A.R.

Multi-Language Sites

Main Categories

Testers and Meters

CO2 , CO , VOC IAQ, Gas Detector

Gem Tools

Car Tools and Equipment

Digital LCD Display DO Dissolved Oxygen Meter Range Thermometer 0~199.9%/0~19.99 PPM/0~19.99 mg/I

$121.10 - $140.90/Piece

1 Piece(Min. Order)

Online PH/EC Conductivity Monitor Meter Tester ATC, Wall Mountable & Rechargeable, Water Quality Real-time Continuous Monitoring

$21.60 - $24.90/Piece

1 Piece(Min. Order)

IP65 Water Quality Meter Pocket Size TDS Salinity Temperature Tester Digital Salt Tester LCD Display w/ ATC

$20.80 - $23.90/Piece

1 Piece(Min. Order)

0-14 pH Electrode Probe BNC Connector, 300cm Cable for PH Meter Monitor Controller Test Sensor Plant Pool Spa

$8.20 - $9.90/Piece

1 Piece(Min. Order)

pH / EC / Temperature Meter ATC 3 in 1 Waterproof Combo Multi-Parameter Tester Pool Spa Drinking Purity

$17.50 - $20.90/Piece

1 Piece(Min. Order)

PHM-203 Chlorine Cl2 Level Meter Tester Monitor pH Swimming Pool Spa Water monitor Quality Analysis PH

$15.40 - $17.70/Piece

20 Pieces(Min. Order)

Wall Mount Indoor Air Quality Temperature RH Carbon Dioxide CO2 Monitor Sensor Detector 0~2000ppm Range

$99.50 - $115.90/Piece

1 Piece(Min. Order)

0~2000ppm Range Digital 3-in1 Round Desktop Indoor Air Quality Temperature RH Carbon Dioxide CO2 Monitor Detector

$80.30 - $93.90/Piece

1 Piece(Min. Order)

CO2, RH & Temp Real-Time Monitor Kit Set w/PC Software Recording Analyzer, Portable Indoor Air Quality Temperature/Dew Point

$128.20 - $148.90/Piece

1 Piece(Min. Order)

HCH-22 HCHO (CH2O), Temperature, Humidity %RH Formaldehyde Monitor Environmental Formaldehyde Monitor Environmental

$124.70 - $144.90/Piece

1 Piece(Min. Order)

Digital Measuring Pressure USB Datalogger Humidity Temperature & Pressure Barometric Data Logger,generate PDF & Excel LED indica

$45.80 - $51.90/Piece

1 Piece(Min. Order)

AZ87797 Datalogger Temperature WBGT Humidity Meter Desktop/Wallmount LED Audible Alarm w/ 8GB SDHC Card LCD Display

$71.90 - $80.90/Piece

1 Piece(Min. Order)

Big Prism Spectroscope Gem Gemstone Testing Gemological Tester Identifier Tool

$52.30 - $59.90/Piece

1 Piece(Min. Order)

NEW Handheld Dark Field 10x Magnification Power Loupe Gem Gemstone Gemology Tester with 18mm Diameter Viewing Lens

$15.00 - $18.90/Piece

1 Piece(Min. Order)

Diamond Moissanite Tester Gemstone 2pt Jewel Stone Combo Gem Test Jewelry Identifier Tool Equipment

$75.20 - $84.90/Piece

1 Piece(Min. Order)

30x Jeweler 20.5mm Gem Loupe Magnifiers Jewelry Triplet Lens Coin Mechanics Machinists Optical Magnification

$7.50 - $11.90/Piece

1 Piece(Min. Order)

Magnifier Glass 10x 25mm Jewellers Eye Jewel Jewelry Loupe Reticle Scale 20mm with LED Light

$18.50 - $21.90/Piece

1 Piece(Min. Order)

NEW Bench Type / Desktop Polariscope Built-in LED Gemstone + 2 Glass Rotatable Filters

$68.00 - $76.90/Piece

1 Piece(Min. Order)

2in1 Non-contact & Contact Digital Laser Tachometer Portable 0.5 ~ 99,999RPM Range Auto Ranging ft & m/min

$22.70 - $25.90/Piece

1 Piece(Min. Order)

Digital Automotive / Vehicular Auto Battery Tester with 6V and 12V Voltage Indicator

$19.60 - $22.90/Piece

1 Piece(Min. Order)

Digital 2-in-1 Tire Pressure Gauge & Tire Veins Depth +/-1.5PSI Accuracy + Backlight

$8.40 - $13.90/Piece

1 Piece(Min. Order)

Circuit Breaker Finder Electric Tool Receiver Transmitter 220V Fuse Locator

$33.90/Piece

1 Piece(Min. Order)

Thermal Leakage Detector 2-in-1 Temperature Meter Non-contact IR Infrared Thermometer w/ Tricolor Indicator Alarm C/F Selection

$9.30 - $11.90/Piece

1 Piece(Min. Order)

Digital Window Tint Meter Visual Light Transmission 18mm Thickness Continuous Measuring

$102.00 - $113.90/Piece

1 Piece(Min. Order)

Top-Ranking Products

6-in-1 Pen type Water Quality Meter pH meter Temperature Conductivity ORP TDS SAL Tester Optional ORP Probe(OEM available)

$65.50 - $79.90/Set

1 Set(Min. Order)

Top Picks

Digital Automotive Fuel Pressure Injection Pump Injector Tester 12V Car Vehicle Diagnostic Tool 4 Modes

$16.00 - $18.40/Piece

20 Pieces(Min. Order)

Digital Automotive Multi-tester Car Auto Motor Battery 9~35V Voltage Tester Interior and Exterior Lamps Checker Analyzer

$41.30 - $46.90/Piece

1 Piece(Min. Order)

6-in-1 Pen type Water Quality Meter pH meter Temperature Conductivity ORP TDS SAL Tester Optional ORP Probe(OEM available)

$65.50 - $79.90/Set

1 Set(Min. Order)

LUCKY Fishfinder 300m/ 980ft Fishing Wireless Operating Range 100m Depth Range w/ Zoom Function Boat Fish Finder

$99.45 - $115.90/Piece

1 Piece(Min. Order)

Diamond Moissanite Tester Gemstone 2pt Jewel Stone Combo Gem Test Jewelry Identifier Tool Equipment

$75.20 - $84.90/Piece

1 Piece(Min. Order)

Digital pH Meter Tester w/ ATC Temperature C/F + Free 3 buffer solutions pH4.01 pH7.00 & pH10.01 (OEM Packaging Available)

$19.20 - $22.90/Set

1 Set(Min. Order)

Lucky Underwater Fishing Camera Fish Finder Camera with Infrared Lights for Ice,Sea Fishing(OEM packaging service available)

Fishing Camera

$79.10 - $91.90/Set

1 Set(Min. Order)

Air Temperature, Globe Temperature & Humidity Datalogger Recorder w/ Heat Index Stress WBGT Meter Tester w/ Backlight Indicator

$86.90/Piece

1 Piece(Min. Order)

pH / EC / Temperature Meter ATC 3 in 1 Waterproof Combo Multi-Parameter Tester Pool Spa Drinking Purity

$17.50 - $20.90/Piece

1 Piece(Min. Order)

Digital Non-Invasive Inductive LED 4-in-1 Tester Wood Drywall Masonry Moisture Meter

$17.90 - $21.90/Piece

1 Piece(Min. Order)

IP65 Housing.

This Water Quality Tester measures TDS (Total Dissolved Solid), Salinity and Temperature of any type of water sample. It is used in Home, School, Professional measuring purposes including Laboratory Test, Water Treatment Business, Aquaculture, Hydroponics, Aqua Farm, Swimming Pool and other related industries.