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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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Air Quality Meters
1
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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)
Smart CO2 Carbon Dioxide Indoor Air Quality Monitor Temperature Humidity Measurement for Bedroom, Rooms, Offices, Classroom
$63.89
/
piece
5 pieces
(Min. Order)
Digital Thermostat Time Temperature Controller 1200W 10A, Heating/Cooling Time Control Modes for Appliances, Fish Tank, Etc
$10.97 - $13.20
/
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)
Mini Vehicle Car Carbon Monoxide CO Gas Detector Portable Digital Meter W/ Lanyard Clip Audible & Visual Alarm RV, Aircraft
$49.09 - $54.54
/
piece
5 pieces
(Min. Order)
Portable Design CO2 Carbon Dioxide Monitor Digital Display w/ Dual Beam NDIR Technology, Color Indicator & Chart Display
$48.13 - $53.47
/
piece
5 pieces
(Min. Order)
Digital Hydrogen Sulfide (H2S) Gas Detector With Audible, Visual, Vibration Alarm Function & Advanced MCU Control
$58.07 - $64.52
/
piece
5 pieces
(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)
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 Thermo-Hygrometer Dew point Wet Bulb Temperature Humidity Sensor with Backlight
$11.83 - $14.61
/
piece
1 piece
(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)
Portable Air Quality Ozone(O3) Gas Detector Temperature & Humidity Tester Meter Office, Indoor, Outdoor (OEM Packaging Available
$51.81 - $67.95
/
set
50 sets
(Min. Order)
Digital Portable Mini Carbon Dioxide Temperature Humidity Detector with Buzzer
$32.32 - $38.24
/
piece
1 piece
(Min. Order)
Multifunctional AIQ Analyzer CO2 PM2.5 PM10 HCHO TOVC Temperature Humidity Monitor NDIR Detector (OEM Packaging Available)
$60.00 - $83.95
/
set
100 sets
(Min. Order)
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)
Professional Digital Humidity Temperature Psychrometer Wet Bulb Temperature with Dew Point Replaceable Probe
$46.38
/
piece
50 pieces
(Min. Order)
Multi-function Digital Meter With Thermometer, Hygrometer, Calendar and Clock Alarm Function for Household, Office, School, Etc
$6.00 - $8.40
/
piece
50.0 pieces
(Min. Order)
HTM-49 GainExpress Digital Hygrometer Psychrometer Humidity & Temperature Meter 0-100%RH LCD Backlight Humidity Range Min/Max Ho
$10.65 - $12.82
/
piece
1 piece
(Min. Order)
Handheld Digital Humidity & Temperature Meter 0~100% RH/ -30~70degC (-22~158degF) Display Backlight Moisture Small Tester Gauge
$10.05 - $12.09
/
piece
1 piece
(Min. Order)
Digital Humidity Temperature Meter Tester Indoor Outdoor Handheld Air Thermo-Hygrometer Hygometer Thermometer, Max Min Hold
$111.95 - $124.05
/
piece
1 piece
(Min. Order)
Dual Display Humidity & Temperature Psychrometer Meter Thermo-Hygrometer Wet Bulb Dew Point Portable Tester Measurement
$12.82
/
piece
5 pieces
(Min. Order)
0-9999 ppm Monitor Temperature RH Dew Point Wet Bulb TWA Carbon Dioxide CO2 Wall Mount Desktop (OEM Packaging Available)
$81.03 - $91.16
/
set
10.0 sets
(Min. Order)
Digital CO2 IAQ Monitor Controller 45M Cable NDIR Sensing Probe w/ Relay Function Green House Home, Office, Factory
$93.90 - $108.90
/
piece
1 piece
(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)
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)
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)
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 6-in-1 Indoor Air Quality IAQ Meter CO2 + CO, Humidity RH%, Temperature, DP, WB, USB Data Logger w/ Software
$259.90
/
piece
10 pieces
(Min. Order)
WBGT Heat Index Stress Datalogger Recorder Air Temperature, Globe Temperature & Humidity Tester (OEM Packaging Available)
$83.53
/
piece
50 pieces
(Min. Order)
Air Temperature, Globe Temperature & Humidity Datalogger Recorder w/ Heat Index Stress WBGT Meter Tester w/ Backlight Indicator
$83.53
/
piece
50 pieces
(Min. Order)
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