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 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)

$27.90 on Amazon

#3 Durometer Tester Shore Gain Express Durometer Tester Shore A Hardness Tester, Rubber Tire Durometer Gauge 0~100HA Digital Hardness Meter with Large LCD Display

$27.90 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 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

#6 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

#7 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

$67.90 on Amazon

#8 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

#9 Wearable 2 in 1 WBGT GAIN EXPRESS Wearable 2-in-1 WBGT + HI Heat Index Checker Wet Bulb Globe Temperature Heat Stress Meter Air Globe Temperature Humidity Tester with Dangerous Level Indicator Audible Alarm

$47.90 on Amazon

#10 🔥 Clinical Refractometer GAIN EXPRESS Clinical Refractometer with ATC, Tri Scale Serum Protein/Urine Specific Gravity/Refractive Index

$22.90 on Amazon

#11 🔥 Diffraction Spectroscope GAIN EXPRESS Diffraction Spectroscope, Pocket Grating Gemological Spectrometer for Quick Gemstone Identification and GIA Use

$32.90 on Amazon

#12 Sound Level Calibrator GAIN EXPRESS Sound Level Calibrator Decibel Meter Sound Level Reader Sonometro Decibel Meter Calibrator 94db & 114db Output Levels For 1 Inch And 1/2 Inch Mic

$112.90 on Amazon

#13 🔥 Digital Light Meter Lux GAIN EXPRESS Digital Light Meter Lux Meter Measurement Range Detachable Sensor 0 to 200,000 Lux Min/Max/Avg Functions (with Data Record Function) + CD Software w/USB Power Cable

$59.99 on Amazon

#14 Diamond Tester Pen High Gain Express Diamond Tester Pen, High Accuracy Jewelry Diamond Tester Professional Diamond Selector for Novice and Expert Jewelry Diamond

$55.90 on Amazon

#15 Accurate Digital Handheld GAIN EXPRESS Accurate Digital Handheld Stroboscope with Wide Measurement Range, 50~12,000 FPM, for Equipment Fault Detection and Maintenance

$119.90 on Amazon

#16 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 Meter with Data Logging for Home, Office, Outside

$35.90 on Amazon

#17 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

#18 Decibel Meter Sound Level GAIN EXPRESS Decibel Meter Sound Level Meter Professional Sound Level Reader Detector 30dB to 130dB MAX Data Hold, Noise Monitor Digital SPL dB Meter With Alarm, Data Record & Rechargeable Function

$35.90 on Amazon

#19 🔥 🆕 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

$28.99 on Amazon

#20 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