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GAIN EXPRESS HOLDINGS LIMITED
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NEW ARRIVALS
Air Quality Meters
Automotive Testing Equipment
Water Quality Meters
Factory Direct Sales IP68 Waterproof Underwater Plants Reef Tanks Full Spectrum Light Quantum Par Meter ppfd
$78.99-95.90
Min. Order: 1 piece
Optical Fiber Identifier Fault Locator 800~1700nm Wavelength Network Testing InGaAs Probe Lightweight Colored Screen Display
$60.20-66.89
Min. Order: 5 pieces
Sound Level Meter Datalogger Noise Tester 43,000 Record Capacity Visual Alarm PC Link Color Screen for Home School Noise Monitor
$22.89-25.83
Min. Order: 5 pieces
Grain Moisture Meter Water Content Analyzer with 11.81" Metal Probe for 14 Grains Wheat Corn Rice Peanut Soybean
$10.11-12.16
Min. Order: 5 pieces
10X Magnification Loupe 6 LED & UV Light Triplet 22mm Optic Lens Rechargeable Jewelry Tool for Collectors Gemologists Jewelers
$9.87-11.87
Min. Order: 5 pieces
30X Jeweler Loupe 6 LED & UV Light 22mm Optic Lens Rechargeable Magnifier for Collectors Gemologists Jewelers Relic Enthusiasts
$10.56-12.70
Min. Order: 5 pieces
Digital Air Quality Detector 400 to 5000PPM NDIR Sensor Temperature Humidity Carbon Dioxide Monitor for Home Office Classroom
$18.90-21.90
Min. Order: 5 pieces
Carbon Dioxide Monitor with 4.5M Day Night NDIR Sensor, CO2 Controller, Adjusts CO2 for Grow Tents, Grow Rooms, Greenhouses
$70.20-75.60
$78.00-84.00
Min. Order: 1 set
Digital Thermo-hygrometer USB Datalogger PDF Excel Report for Temperature Humidity Barometric Pressure
$38.90-43.90
Min. Order: 30 pieces
Professional Digital Thermo-hygrometer Data Logger PDF Excel Report USB Datalogger for Temperature Humidity Barometric Pressure
$43.73-48.58
Min. Order: 5 pieces
Dual Output with 15ft Remote NDIR Sensor Human Plant Mode Air Quality Detector CO2 Monitor Controller for Greenhouse Mushroom
$92.90-107.90
Min. Order: 1 piece
Digital Air Quality Temperature Meter 4.5M Cable NDIR Sensor Human Plant Mode CO2 Carbon Dioxide Monitor Controller Home Office
$93.90-108.90
Min. Order: 1 set
Digital Tint Meter Window Tint Tool ATC Measuring VL Visible Light UV IR Transmittance Rejection Of Solar Film Stick-film Glass
$62.28-69.20
Min. Order: 5 pieces
Shore D Hardness Meter Tester Automotive Thickness Gauge 0~100HD Range Rubber Plastics High Quality LCD Self Calibrated
$16.64-18.78
Min. Order: 5 pieces
Mitech MH600 Portable Leeb Hardness Meter 6 Impact Devices IP65 Metal 170~960HLD Chinese-English Metallic with Carrying Case
$759.30-898.00
Min. Order: 1 piece
Automotive Noise Vibration Finder Electronic Stethoscope Battery Powered High Sensitivity Long Short Probe 100Hz~10kHz Range
$31.63-35.70
Min. Order: 1 piece
Wireless Window Tint Meter 0-100% Infrared Light Transmittance Transmission Measuring Gauge Tester Transparency for Car Plastics
$130.12-140.26
Min. Order: 1 piece
Digital Mechanic's Engine Stethoscope with Headphone & 2 Separate Sensor Probe, 10~10K Hz Sound Noise Detection Automotive Tool
$115.85-128.38
Min. Order: 1 piece
6in1 Water Quality Testing Meter TOC UV275 EC TDS COD Temperature Tester Intelligent Scoring Mode Colored Backlight Indicator
$27.15-30.64
Min. Order: 5 pieces
Long pH Electrode with 50 Ohm 150cm BNC Connector Cable & Calibration Powder for Sea Water and Acid Rain
$8.00
Min. Order: 500 pieces
Digital EC Conductivity Meter Tester Factory Calibrated 10~1990uS/cm Range
$9.49-9.50
Min. Order: 100 pieces
Digital 3-in-1 pH EC Temperature Tester Waterproof IP65 for pH/EC Measurement in Water, Meats Soft Solid Food Samples with ATC
$29.33-33.10
Min. Order: 5 pieces
2-in-1 Food PH Soil Meter Temperature Measure Acidity Tester for Dough Meat Cheese Bread Fruit High Precision Replaceable Probe
$19.20-21.67
Min. Order: 5 pieces
GAINEXPRESS 8-in-1 Water Test Kit pH. ORP. EC Conductivity, TDS, Salt, S.G., CF, and Temperature with Online APP Tester
$43.12-47.92
Min. Order: 5 pieces
Top picks
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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
145 sold
Diamond Moissanite Tester Gemstone 2pt Jewel Stone Combo Gem Test Jewelry Identifier Tool Equipment
$73.75-81.94
Min. Order: 2 pieces
6 sold
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
2 sold
LUCKY FF918-CWLS Color Display Bait Boat Fish Finder with 300m/980ft Wireless Operating Range(OEM Packaging Available)
$99.45-115.90
Min. Order: 1 set
4 sold
Handheld Par Meter PPFD Tester Up to 3999umol/(m2s) Measurement For for Green House and Led Grow Lights (OEM Packaging Available
$68.26-77.31
$75.85-85.90
Min. Order: 1 set
7 recent viewed
Digital PAR Meter Full-Spectrum Quantum PPFD Tester for Plant Photosynthetic Activity Measurement(OEM Packaging Available)
$52.05-57.82
$57.83-64.25
Min. Order: 5 pieces
4 sold
Thermocouple Thermometer K/J/ T Datalogger 4-Channel Display With Real Time Data Logging Visible Alarm & ADJ Compensation
$37.49-41.65
Min. Order: 5 pieces
20 sold
Digital pH Controller Dual Relay Output Temperature Compensation Adjustable pH 4.5-8.5 Ideal Aquariums Hydroponics Indoor Plant
$157.91-175.30
Min. Order: 1 piece
High Accuracy Measuring 30dB-130dB with Data Record Function Sound Level Meter with Backlit Display Compact Professional
$24.05-27.14
Min. Order: 5 pieces
MAN-45 Professional Digital Manometer +/-13.78kPa +/-2PSI Suitable for 1-1 pipes,Ventilation,Air Condition System 11 units
$20.61-23.26
Min. Order: 1 piece
1 sold
Top-ranking products
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Pocket Diamond Tester UV Light Gemstone Tool Selector 2pt Stones Compact Design Audible Warning Sound Buzzer With Vinyl Pouch
$29.75-33.57
Min. Order: 2 pieces
56 recent viewed
View details
Water Quality Meters
Chlorine Meters
Conductivity (EC) Meter
Dissolved Oxygen (DO) Meter
Electrode (pH / ORP)
Optional Accessories
ORP Tester / Monitor
pH Meter / Monitor
View more
Wall-mounted Electronic Water Level Alarm with Power Lamp & Level line Indicator Groove Fences Decks Cabinets Framing Leveling
$6.92-8.32
sdf 1 piece
View details
2-in-1 Food PH Soil Meter Temperature Measure Acidity Tester for Dough Meat Cheese Bread Fruit High Precision Replaceable Probe
$19.20-21.67
sdf 5 pieces
Digital 3-in-1 pH EC Temperature Tester Waterproof IP65 for pH/EC Measurement in Water, Meats Soft Solid Food Samples with ATC
$29.33-33.10
sdf 5 pieces
Digital PH Temperature Meter Pentype Water Quality Tester Replaceable Sensor Colored Screen for Lab Agriculture Food Processing
$17.80-23.90
sdf 1 piece