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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
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Digital Gas Leak Detector 0~9999PPM Range Audible/Visual Alarm Gooseneck Semiconductor Sensor Propane, Natural Gas, Combustible
$33.45 - $37.17
Shipping: $11.34/piece
Min. Order: 5 pieces
Add to cart
Combustible Portable Gas Leak Detector Methane, LPG, LNG, Fuel, Sewer Gas. Alcohol, Gasoline (OEM Packaging Available)
$13.45 - $15.17
Shipping: $6.36/piece
Min. Order: 5 pieces
Add to cart
Wifi Smart Combustible Gas Leak Detectors Loud & LED Alarm App Control For Natural Gas, LPG, Coal, Methane, Propane Etc
$13.91 - $15.70
Shipping: $7.46/piece
Min. Order: 5 pieces
Add to cart
Portable Gas Leak Detector Natural Gas Detector Combustible Gas Sniffer with Audible & Visual Alarm
$13.45 - $15.17
Shipping: $28.00/piece
Min. Order: 1 piece
3 sold
Add to cart
Portable 4-in-1 Multi Gas Leak Detector Monitor H2S/O2/CO/ Ex (LEL) IP65 Rechargeable Lithium Battery Gas Analyzer
$66.94 - $74.38
Shipping: $13.74/piece
Min. Order: 5 pieces
Add to cart
Digital Hydrogen Sulfide (H2S) Gas Detector With Audible, Visual, Vibration Alarm Function & Advanced MCU Control
$58.07 - $64.52
Shipping: $11.34/piece
Min. Order: 5 pieces
Add to cart
High Sensitivity Handheld Precision Combustible Methane Propane Gas Leak Detector Alarm Sensor 40-640ppm Range
$61.83
Shipping to be negotiated
Min. Order: 50 pieces
Dual Differential Manometer Gas Pressure Tester Meter, Backlight 12 Selectable Units Air Pressure Gauge W/ Data Storage Function
$32.50 - $36.11
Shipping: $7.46/piece
Min. Order: 5 pieces
Add to cart
Mini Vehicle Car Carbon Monoxide CO Gas Detector Portable Digital Meter W/ Lanyard Clip Audible & Visual Alarm RV, Aircraft
$49.09 - $54.54
Shipping: $6.36/piece
Min. Order: 5 pieces
Add to cart
Portable Air Quality Ozone(O3) Gas Detector Temperature & Humidity Tester Meter Office, Indoor, Outdoor (OEM Packaging Available
$51.81 - $67.95
Shipping to be negotiated
Min. Order: 50 sets
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
Shipping to be negotiated
Min. Order: 1 set
23 orders
CO2 Carbon Dioxide Monitor & Controller (Relay Function) w/ Remote Sensor for Home, Office, Hospital (OEM Packaging Available)
$93.90 - $108.90
Shipping to be negotiated
Min. Order: 1 piece
5 orders
Digital
MAN-45 Professional Digital Manometer +/-13.78kPa +/-2PSI Suitable for 1-1 pipes,Ventilation,Air Condition System 11 units
$20.61 - $23.26
Shipping: $28.00/piece
Min. Order: 1 piece
1 sold
Add to cart
0~9999ppm Range Wall Mount Indoor Air Quality Monitor CO2 Meter Temperature RH Carbon Dioxide Tester (OEM Packaging Available)
$97.02 - $107.51
Shipping: $28.00/set
Min. Order: 1 set
Add to cart
Wall Mountable CO2 Detector w/ Alarm 0~9999ppm Range Carbon Dioxide Monitor Meter RH Indoor Air Quality IAQ Sensor
$97.02 - $107.51
Shipping: $28.00/piece
Min. Order: 1 piece
Add to cart
Ultrasonic Leakage Detector ULD-586 Frequency Response 20 KHz to 100 Khz(OEM packaging service available)
$130.00 - $175.00
Shipping: $31.80/set
Min. Order: 1 set
Add to cart
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