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 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

#6 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

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

$33.99 on Amazon

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

$22.90 on Amazon

#9 Decibel Meter Data Logger GAIN EXPRESS Decibel Meter Data Logger, Digital Sound Level Meter with Recording, dB Meter 30~130dB, 31,000 Data, 3Color Light Alarm, USB Rechargeable SPL Meter for Home, Classroom, Office, Neighbor, Industrial

$35.90 on Amazon

#10 Pool Thermometer Floating GAIN EXPRESS Pool Thermometer Floating, IP68 Waterproof Wireless Pool Thermometer Easy Read for Water Temperature with Solar Charging/RGB Lighting/Large Screen for Swimming Pools, Spas, Hot Tubs, Ponds

$15.90 on Amazon

#11 🔥 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

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

$115.90 on Amazon

#13 Dissolved Oxygen Meter GAIN EXPRESS Dissolved Oxygen Meter, Dissolved Oxygen Tester with 11.48 ft Cable, DO meter with ATC/Temp/Manually Salt/99 Memory/Data Hold, Dissolved Oxygen Test Kit for Aquarium, Fish Tank(With IRDA Port)

$175.90 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

$134.90 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

$44.99 on Amazon

#16 18 Egg Incubator with GAIN EXPRESS 18 Egg Incubator with Automatic Egg Turning, Egg Candler, Automatic Water Bottle Refill, Eggs Incubators for Hatching Eggs Chickens Duck Quail Bird, Temp and Humidity Display

$35.90 on Amazon

#17 Replacement pH Electrode GAIN EXPRESS Replacement pH Electrode with Calibration Powder, 0-14 pH Highly Accurate Probe with BNC Connector & 200cm Cable for Continuous Liquid Measurement

$19.90 on Amazon

#18 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

#19 EMF Meter Rechargeable GAIN EXPRESS EMF Meter Rechargeable Digital Electric and Magnetic Field Radiation Detector with Color-Screen Display Hand-held Digital LCD EMF Detector for Home EMF Inspections, Office, Outdoor

$27.90 on Amazon

#20 0 14 pH Electrode Probe GAIN EXPRESS 0-14 pH Electrode Probe BNC Connector, 300cm Cable for PH Meter Monitor Controller Test Sensor, Replacement Kit for Aquarium Hydroponics Plant Pool Spa (pH Electrode)

$17.09 on Amazon