Gain Express
Gain Express is a Hong Kong-based manufacturing and trading company established in 2003 that offers a wide range of electronic products and testing instruments. We have years of trading experience (B2B / B2C) with customers from North America, South America, Asia, Australia / Oceania, Europe, Africa, the Middle East and so on.
Some of our products have passed European CE certification and ISO9001 quality management system certification. Get high quality but affordable tools from us!
SLM-441 Decibel Meter Datalogger Sound Level Tester
AQM-385 Carbon Dioxide CO2 Monitor 0~5000ppm Range
CAB-449 Optical Fiber Identifier 800～1700nm Wavelength
SLM-442 Sound Level Meter Datalogger Decibel Noise Tester
GEM-450_40X Jeweler Magnifier Loupe 40X
GEM-450_10X Rechargeable 10X LED & UV Gem Loupe
GEM-451 30X Magnifier Mini Jeweler Loupe
GEM-451 10X Magnifier Mini Jeweler Loupe
8930B Compact Sound Level Calibrator 114dB / 94dB / 104dB Calibration
LUX-429 Digital Light Lux Meter Illuminance Tester Photometer Luxmeter
LKD-432 Refrigerant Leak Detector Handheld 17-inch Gooseneck Probe
AQM-419 Dual-Output CO2 Controller Carbon Dioxide Monitor
EMF 423 Professional EMF Meter Tester Electromagnetic Field Radiation Detector
560-10C Shore C Digital Hardness Meter Durometer 0~100HC
USC-409 Ultrasonic Cleaner 45Khz 255ML Ultrasonic
EMF-280 Digital EMF Tester Electric and Magnetic Field Radiation Detector
CLMG 7173LI_LED Magnifier Scale Loupe 10x Magnification 8 LED Light
WQM-341 Water Quality Tester pH / EC / TDS / Salinity / SG / Temperature with 24Hrs APP Monitoring
WQM-397 Smart 5-in-1 pH / TDS / Salt / S.G / Temperature WiFi Tester Water Quality
SLM-30B Professional Sound Level Meter with Smart Bluetooth Function 20000 Datalogging
JEM-II Diamond Tester with Ultraviolet (UV) Light
710-110 / BAT-377 Battery Tester Checker C AA AAA D N 9V 1.5V Button Cell
CLMG-7206 Handheld 55mm Durable Small Diffraction Spectroscope
68022_2P Digital 2 Channels K-Type Thermometer w/ 4 Thermocouples
GAM-391 Geiger Counter Nuclear Radiation Detector
PAR-355 Light PAR Meter Advanced Quantum Sensor
7530 Wall-Mount CO2 Controller - Optimize Air Quality in Your Space!
PAR-380 Digital PAR Meter - Precision for Plant Growth Optimization
GM11 Mini 10X Jeweler Loupe Magnifier with LED & UV Light - Unveiling Hidden Details!
E04-036 Automotive Car Repair Diagnostic Tool