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Refractive Index Fluid Oil x 2 Bottles Refractometer RI
C $79.37
Light Intensity Meter PPFD PAR Tester for Outdoor Indoor Plants Led Grow Lights
C $119.13
Gemology Gemstone Gem Refractometer LED Monochromatic Light Filter 1.30 ~ 1.81RI
C $127.35
Wireless Weather Station Temperature Humidity RCC DCF w/ 3 Remote Sensors
C $47.84
Decibel Meter Large Colored LED Screen Display Sound Level Tester 30dB to 130dB
C $91.71
Jewelers Loupe 10X Magnifying Glass with Light Jewelry Eye Loop w/ Reticle Scale
C $41.11 to C $91.83
Wireless Weather Station with 3 Sensors Touch Sreen Humidity Temperature RCC DCF
C $47.84
K/J Type Thermocouple Thermometer Temperature Meter Tester Dual Channel 4 Probes
C $54.56
PH & Temperature Monitor Meter 2 IN 1 Dual Display Mini Water Quality Tester kit
C $46.46
Replacement Remote Sensor for Wireless Weather Station Temperature Humidity
C $32.76
30x Magnification Jewelry Gem Loupe with UV & 6 LED Light, 21mm Optical Glass
C $32.76
Professional Multi-Field EMF Detector Meter Electromagnetic Radiation 3-in-1
C $219.20
DIAMOND TESTER SELECTOR MOISSANITE Tester UV Ultraviolet Light JEM-II + JEM-III
C $123.36
6X420mm Dental Binocular Loupes Medical Surgical Loupes Dentist Magnifier US
C $287.74
CO2 Carbon Dioxide IAQ Monitor Controller with Relay Function NDIR Sensing Probe
C $208.23
Digital Sound Level Meter Calibrator Professional Noise Decibel Calibration Tool
C $178.07
Window Tint Meter Portable Tool Visible Light, UV IR Measure Solar Film Car Tint
C $148.04
Ruby Filter Gem Emerald Identification Gemstone Red Pink Tester Tool Identifier
C $45.10
Swimming Pool pH Meter Chlorine Tester Analog Water Analysis Test Kit
C $39.74
Dual-Channel K / J / T / E / R / S / N-Type ATC Thermocouple Thermometer Tester
C $50.58
PH/ORP Controller with Monitoring and Dosing in Water App Remote Online Monitor
C $156.14
LUCKY Fish Finder Depth Wireless Remote Control Sonar Fishing Locator Tracker
C $238.51
AC / DC Gaussmeter Magnetic Field Strength Meter Teslameter Magnet N/S Polarity
C $353.54
0-5000ppm Temperature IAQ Meter Air Quality Tester Dual-Beam NDIR Sensor Monitor
C $117.76
Professional Ultrasonic Steel Iron Thickness Meter Gauge Measure 1.2~220mm
C $210.97
10x 21mm Loupe Jeweler Magnifier LED UV Light Triplet Lens Magnifying Gem Tool
C $45.10
Bench Type Polariscope Built-in w/ LED, Rotatable Platform 2 poalorized Filters
C $179.44
Professional Sound Level Meter Noise Decible Tester 30dB~130dB High Accuracy
C $49.19
2 IN 1 Diamond & MoissaniteTester Gem 2pt Diamond Selector JewelryTest Tool
C $164.37
Smart Decibel Meter w/ Large LED Screen Sound Level Meter Noise Monitor 30-130dB
C $91.57
Digital Sound Level Meter Calibrator Pressure Noise Level Tester Measurement
C $164.37
6V 12V Automotive Car Battery Tester Charging Cranking Test Analyzer
C $43.85
K-Type Thermocoupe 4 Channel -200~1370°C /-328~2498°F SD Card Logger Thermometer
C $226.05
Chelsea Filter for Gem Identification Emerald Green, Blue and Red Gemstones
C $43.73
Socket Tester Receptacle Detector Red Light Test Result Indicator Outlet Tester
C $36.88
Window Tint Meter Visual Light Transmission 18mm Thickness Continuous Measuring
C $191.78
10x Magnification Jewelery Loupe, 20.5mm Triplet Lens Achromatic Optical Glass
C $36.88
Wireless Fish Finder 45m (135ft) Depth & 120m (400ft) for Fresh & Salt Water
C $130.09
Circuit Breaker Finder Electric Tool Receiver Transmitter Fuse Locator 220V
C $75.26
Universal Battery Tester Analyzer C D N AA AAA 9V 1.5V Button Cell Batteries
C $13.57
Digital Sound Level Meter Datalogger A/C/Z Weighted SPL Decibel Meter 30~130 dB
C $116.39
Universal Battery Tester Analyzer C D N AA AAA 9V 1.5V Button Cell Batteries
C $31.39
Lucky Wifi 70M Range Fish Finder 45m/130ft Depth Range for Fresh and Salt water
C $149.29
Multipurpose Network LAN Phone Cable Tester w/ 8 far-end test jacks, hunt 5E, 6E
C $152.03
Pen-type Dissolved Oxygen Tester DO Meter with Electrode Filling Fluid
C $205.49
Clinical Refractometer with ATC Tri-Scale-Serum Protein Urine SG Veterinary Vet
C $42.36
Electronic Digital Inclinometer Bevel Box Gauge Angle Protractor ±180°(0-360°)
C $61.55
Automotive Circuit Tester Tracker Electrical Diagnostic Tool Short Open Finder
C $68.41
About us
Gain Express Holdings Ltd - We are a professional supplier of all kinds of testing instruments based in Hong Kong. We supply a wide range of products w/ CE approval and our factory is certified by EN ISO9001-2000. You can easily find our company's background via search engines. ie. Google or Yahoo
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Seller feedback (79,451)
h***h (69)- Feedback left by buyer.
Past 6 months
Verified purchase
Great Seller!, fast shipping,product as described, would buy again.
-***r (162)- Feedback left by buyer.
Past 6 months
Verified purchase
great shipping/ packaged great / very professional / great seller / *****
l***l (260)- Feedback left by buyer.
Past 6 months
Verified purchase
Fast delivered and units are as specified . Thank you.
o***2 (1119)- Feedback left by buyer.
Past 6 months
Verified purchase
Exactly what I ordered, delivered on time.
e***c (2490)- Feedback left by buyer.
Past 6 months
Verified purchase
As described. Fast shipping.
g***l (144)- Feedback left by buyer.
Past 6 months
Verified purchase
Scientiffic instrument recieved thank you for good price!