GAIN EXPRESS best sellers

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

£32.90 on Amazon

#2 🔥 CO2 Meter Handheld CO2 GAIN EXPRESS CO2 Meter Handheld CO2 Monitor 9999ppm Measuring Range Carbon Dioxide Detector NDIR Sensor Air Quality Temperature Humidity Meter

£135.90 on Amazon

#3 Automotive Electrical GAIN EXPRESS Automotive Electrical Open&Short Finder Circuit Tester Power Circuit Finder Detector Tone Generator Cable Wire Breaker Tracker Circuit Fault Finder DC 6-42V Car Diagnostic Tool

£29.90 on Amazon

#4 Handheld Digital Laser Gain Express Handheld Digital Laser Non-Contact RPM Meter 2.5-99999 RPM Record (60 data) / MAX/MIN / AVG Function ±0.02% + 1 Digtal Accuracy/Speedometer Tachometer Meter display

£25.90 on Amazon

#5 2 in 1 Digital Laser GAIN EXPRESS 2 in 1 Digital Laser Photo Tachometer Non Contact and Contact

£43.99 on Amazon

#6 OPM Optical Power Meter GAIN EXPRESS OPM Optical Power Meter Digital Power Factor Meter, -70~6dBm with 6 Optic Wave Length, Portable Fiber Optic Cable Tester with FC converter for FC/SC/ST

£32.90 on Amazon

#7 High Accuracy pH Electrode GAIN EXPRESS High-Accuracy pH Electrode Probe with BNC Connector 200cm for PH Meter Monitor Controller Test Sensor, Replaceable Precise Measurements

£18.90 on Amazon

#8 🔥 🆕 CO2 Carbon Dioxide Detector GAIN EXPRESS CO2 Carbon Dioxide Detector Indoor Air Quality Monitor Temperature, Humidity Meter, Portable Tabletop or Wall Mountable CO2 Meter with Adjustable CO2 Alarm Threshold

£29.90 on Amazon

#9 Digital 4 Channels K GAIN EXPRESS Digital 4 Channels K Type Thermocouple Thermometer with Metal & Bead Probes, Handheld with Backlight, High Temp Meter Tester Multi Measurement Instrument Tool, -50~700°C (-58~1292°F)

£37.90 on Amazon

#10 Carbon Dioxide Detector GAIN EXPRESS Carbon Dioxide Detector Temperature RH Humidity Indoor Air Quality Wall Mountable CO2 Monitor

£57.90 on Amazon

#11 Pen Type Salinity & Temperature GAIN EXPRESS Pen Type Salinity & Temperature Meter ATC NaCl Salt Water Quality Tester for Saltwater Aquarium Hydroponics Food Salinity Meter (70.0ppt)

£36.90 on Amazon

#12 Landtek Instruments Window GAIN EXPRESS Landtek Instruments Window Tint Meter Visual Light Transmission 30mm Tester

£129.82 on Amazon

#13 Landtek Instruments Window GAIN EXPRESS Landtek Instruments Window Tint Meter Visual Light Transmission 30mm Tester

£152.90 on Amazon

#14 10X 21mm Lens Magnification GAIN EXPRESS 10X 21mm Lens Magnification Mini Folding Jewelers Eye Loupe Jewelry Magnifier for Gems Jewelry Rocks Stamps Coins Watches Hobbies Antiques Gems, Coins, Stamps

£22.90 on Amazon

#15 Handheld Heavy Duty Calcite GAIN EXPRESS Handheld Heavy Duty Calcite Dichroscope, Trichoic Gem & Gemstones Gemological Testing, Jeweler Tool Metal Body Gemology 15mm Diameter Gemologist

£31.90 on Amazon

#16 Jadeite Filter for Gem GAIN EXPRESS Jadeite Filter for Gem Identification Emerald Green, Blue and Red Gemstones

£19 on Amazon

#17 2 in 1 Digital Laser GAIN EXPRESS 2 in 1 Digital Laser Photo Tachometer Non Contact and Contact

£42.50 on Amazon

#18 Desktop CO2/RH/Temp 3 GAIN EXPRESS Desktop CO2/RH/Temp 3 in 1 Monitor, Indoor Air Quality 9999 ppm Carbon Dioxide/Humidity/Temperature Deg C/F Meter Tester Detector, for Home/Office/Laboratory/Room/Classroom

£89.99 on Amazon

#19 Digital K/J/T/E/R/S/N GAIN EXPRESS Digital K/J/T/E/R/S/N Type Thermocouple Thermometer Dual-channel LCD Display -150~1767°C ATC Temperature Meter Tester, Celsius and Fahrenheit Accurate to ±0.1%+0.6℃, With Backlight

£25.90 on Amazon

#20 ORP Redox Meter Tester GAIN EXPRESS ORP Redox Meter Tester -1999~1999mV, 1-point Calibration, Oxidation Reduction Potential, Aquariums, Swimming Pools, Water Treatment Systems, Aquaculture, Spa

£26.90 on Amazon