GAIN EXPRESS best sellers

#1 Jewelers Loupe Magnifier Gain Express Jewelers Loupe Magnifier, Jewelry Loop Magnifier with Light, Hastings Triplet Loupe 10X for Coin, Gem, Stamp, Diamond etc (White LED & UV Light)

$19.90 on Amazon

#2 Durometer Tester Shore GAIN EXPRESS Durometer Tester Shore A Hardness Tester, Rubber Tire Durometer Gauge 0~100HA Digital Hardness Meter with Large LCD Display

$29.90 on Amazon

#3 Shore D Hardness Tester GAIN EXPRESS Shore D Hardness Tester Meter Portable 0-100HD Digital Durometer D for Rubber, Tire, Plastic, Thermal Plastic, Flooring, Bowling Ball with Large LCD Display

$29.90 on Amazon

#4 2 in 1 Digital Tachometer GAIN EXPRESS 2-in-1 Digital Tachometer, Non Contact RPM Meter Laser Photo Tachometer 3~100,000 RPM, Contact RPM Tachometer 3~19999RPM Speed Meter with Data Hold, Max/Min/AVG

$29.90 on Amazon

#5 Thermocouple Thermometer GAIN EXPRESS Thermocouple Thermometer Digital K Type Dual Channel Thermometer HVAC Temperature Meter with 4 Thermocouples, MAX/MIN/AVG Temperature Measurement, -50~1300°C (-58~2372°F)

$25.90 on Amazon

#6 🔥 Watt Power Meter Plug in GAIN EXPRESS Watt Power Meter Plug-in Socket Power Meter, Home Electrical Usage Monitor Consumption, Kilowatt Wattage Voltage AMP Tester with Backlight Overload Protection

$22.99 on Amazon

#7 🔥 Digital Combo pH & Temperature GAIN EXPRESS Digital Combo pH & Temperature Meter, Aquarium Thermometer pH Monitor with Automatic Calibration Function for Fish Tank Hydroponics Aquaculture Laboratory

$36.90 on Amazon

#8 🔥 Quantum PAR Meter for GAIN EXPRESS Quantum PAR Meter for LED Grow Light Full Spectrum PPFD Meter High Precision Quantum Sensor, Light Meter for Plants, Greenhouse and Farming Lux Meter Tester 400-700nm

$79.90 on Amazon

#9 🔥 Jewelry Loupe LED Scale GAIN EXPRESS Jewelry Loupe, LED Scale Loupe 10x Magnifier with 8 LED Light & Adjustable Focal Length, Jewelers Loop Magnifying Glass for Jewelry Gems, Coins, Hobby, Diamond (Interchangeable Scale)

$29.90 on Amazon

#10 Thermocouple Thermometer GAIN EXPRESS Thermocouple Thermometer Digital K/J Type with 4 K Type Thermocouple, HVAC Thermometer with Alarm & Adj Compensation, Temperature Meter -328°F ~ 2501°F Measuring Range

$27.90 on Amazon

#11 Decibel Meter Sound Level GAIN EXPRESS Decibel Meter Sound Level Meter Recorder Digital dB Meter Professional Noise Meter Detector Monitor 30dB to 130dB Portable SPL Decibel Meter with Data Logging for Home, Office, Outside

$35.90 on Amazon

#12 Professional Sound Level GAIN EXPRESS Professional Sound Level Calibrator Decibel Meter Calibration with Three Calibration Level at 94dB & 104dB & 114dB, SPL Meter Calibrator for dB Noise meter

$79.79 on Amazon

#13 USB Temperature Data GAIN EXPRESS USB Temperature Data Logger Recorder for Temperature Humidity and Atmospheric Pressure, IP65 Waterproof Temperature Logger with PDF and CSV Reports High Accuracy

$69.90 on Amazon

#14 Digital 4 Channel Thermocouple GAIN EXPRESS Digital 4 Channel Thermocouple Thermometer Temperature Recorder Data Logger AZ Instruments Multi Channel K Type Thermometer Thermocouple Reader with 8G SD Card 2 Bead Type K-Thermocouple Probe

$129.90 on Amazon

#15 Soil PH Meter Soil Moisture GAIN EXPRESS Soil PH Meter, Soil Moisture Sensor Meter, Soil PH Tester Gardening Tool Kits for Plant, Tree, Soil Tester for Moisture Great for Garden, Lawn, Farm, Indoor & Outdoor Use 295mm Long

$55.99 on Amazon

#16 🔥 Digital Sound Level Meter GAIN EXPRESS Digital Sound Level Meter Calibrator 94dB & 114dB for 1/2" and 1" inch Microphone, Professional Noise Decibel Calibration Tool Measurement Accuracy Check

$109.90 on Amazon

#17 Clinical Refractometer GAIN EXPRESS Clinical Refractometer with ATC, Tri-Scale Serum Plasma Protein Test 2-14g/dl Urine Specific Gravity 1.000-1.060SG, for Veterinary Vet Cat Dog Pets

$19.90 on Amazon

#18 🔥 5 in 1 Water Quality GAIN EXPRESS 5-in-1 Water Quality Multi-Parameter PH EC CF TDS (ppm) Temperature Test Meter Backlight, Wall-mountable Rechargeable Continuous Monitor Tester, Aquariums Hydroponics Pool Fish Tank Pond Drinking

$69.99 on Amazon

#19 🔥 Non Contact Tachometer GAIN EXPRESS Non Contact Tachometer, 2.5-99999 RPM ±0.02%+1Digtal Accuracy Laser Digital Tachometer, Speed RPM Meter Gauge with Backlight, Data Hold, and Max/Min/AVG Function

$21.90 on Amazon

#20 Handheld Digital Window GAIN EXPRESS Handheld Digital Window Tint Meter 0%~100% Range Visual Light Transmission Light Transmission Continous Measurement Function (up to 4000) for Mesuring Film, Filmed Glass, Window Tint, Side Windshield

$122.90 on Amazon