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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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All-in-1 Accurate Mountable Indoor Air Quality Monitor, Real-time CO2 & Temperature & Humidity Level with Visual & Alarm
$120.73 - $133.78
/
piece
5 pieces
(Min. Order)
Indoor Air Quality Monitor All-in-1 CO2 & Temperature & Humidity Level Meter Mountable w/ NDIR Sensor (OEM Packaging Available)
$120.73 - $133.78
/
set
5 sets
(Min. Order)
Wall Mountable CO2 Detector w/ Alarm 0~9999ppm Range Carbon Dioxide Monitor Meter RH Indoor Air Quality IAQ Sensor
$97.02 - $107.51
/
piece
1 piece
(Min. Order)
3-in-1 CO2 Carbon Dioxide Sensor Desktop Indoor Air Quality Data logger Humidity RH Monitor (OEM Packaging Available)
$83.00
/
set
50 sets
(Min. Order)
Multi-function CO2 PM2.5 Air quality detector Temperature Humidity monitor (OEM Packaging Available)
$48.89 - $65.43
/
piece
100 pieces
(Min. Order)
CO2 Carbon Dioxide Monitor & Controller (Relay Function) w/ Remote Sensor for Home, Office, Hospital (OEM Packaging Available)
$93.90 - $108.90
/
piece
1 piece
(Min. Order)
0~9999ppm Range Wall Mount Indoor Air Quality Monitor CO2 Meter Temperature RH Carbon Dioxide Tester (OEM Packaging Available)
$97.02 - $107.51
/
set
1 set
(Min. Order)
Smart Air Detector Analyzer Air Quality Monitor CO2 Meter, TVOC, Humidity, Temperature, PM2.5, PM1.0 W/ Relay Output APP Control
$79.27 - $87.84
/
piece
5 pieces
(Min. Order)
Digital Air Quality Monitor Detector PM2.5/PM1.0/PM10/HCHO/TVOC/Temp & Humidity (OEM Packaging Available
$48.89 - $55.90
/
set
1 set
(Min. Order)
Digital Air Quality Monitor Detector Thermometer Hygrometer PM2.5/1.0/10 HCHO/TVOC/Temp./Humidity/CO2 (OEM Packaging Available)
$63.86 - $75.31
/
set
100 sets
(Min. Order)
Smart CO2 Carbon Dioxide Indoor Air Quality Monitor Temperature Humidity Measurement for Bedroom, Rooms, Offices, Classroom
$63.89
/
piece
5 pieces
(Min. Order)
Indoor Air Quality 9999ppm Digital Carbon Dioxide Temperature Humidity NDIR Sensor IAQ CO2 Monitor WB DP Tester CO2 Meter
$93.50 - $103.90
/
piece
1 piece
(Min. Order)
Digital Carbon Dioxide Temperature Humidity CO2 Monitor WB DP Tester Handheld CO2 Meter (OEM Packaging Service Available)
$93.50 - $103.90
/
set
1 set
(Min. Order)
Indoor Air Quality IAQ Meter CO2, CO, Humidity RH%, Temperature, DP, WB, USB Data Logger(OEM Packaging Service Available)
$237.35 - $249.37
/
set
1 set
(Min. Order)
Smart Wifi CO2 Detector Monitor Air Quality Indoor Temperature & Humidity Tester NDIR Sensor for Grow Tent, Mushroom, Home
$34.93 - $38.81
/
piece
1 piece
(Min. Order)
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
/
set
1 set
(Min. Order)
Digital CO2 Carbon Dioxide Monitor Detector 400~5000PPM NDIR Sensor Temperature Humidity Tester for Home, Office, Classroom Etc
$21.56 - $24.34
/
piece
5 pieces
(Min. Order)
CO2 Carbon Dioxide Monitor Indoor Air Quality Meter Tester 400~5000PPM Wall Mount / Tabletop Colored Screen Display NDIR Sensor
$16.96 - $19.14
/
piece
5 pieces
(Min. Order)
Carbon Dioxide Monitor CO2 Controller w/ built-in Dual Beam NDIR Sensor,Auto Detect Day Night Function For Greenhouse, Mushroo
$93.90 - $108.90
/
set
1 set
(Min. Order)
Digital 3-in1 CO2 Carbon Dioxide Sensor Desktop Indoor Air Quality Data logger Temperature Relative Humidity w/ CD & Software
$83.00
/
piece
50 pieces
(Min. Order)
Smart CO2 Detector Monitor Air Quality Indoor Temperature & Humidity Tester NDIR Sensor (OEM Packaging Available)
$34.93 - $38.81
/
piece
5 pieces
(Min. Order)
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