#gain express

Gain Express Enaly OZX-300AT 500mG/hr Home O3 Ozone Generator with Air Dryer/Timer/Adjustable Output, Air Quality Purifier Clean Food Sterilization

ORP Redox Electrode, BNC Type Connector Replacement Probe for Tester Meter Monitor Controller Oxidation Reduction Potential Check, 14cm Long 1.2cm Diameter 300cm Extra Long Cable

ORP Oxidation-Reduction Potential REDOX 256mV Calibration Solution 50ml

2 in 1 Digital pH and ORP Controller with Separate Relays Repleaceable Electrode BNC Type Probe Water Quality Tester for Aquarium Hydroponics Tank Monitor 14.00pH / 1999mV Calibration Solution

ORP Redox Meter -1999 1999mV Oxidation Reduction Potential Tester with 256mV ORP Calibration Buffer for Water Testing, Aquarium, Research Laboratory

Digital pH Monitor Meter ATC 0 14.00pH Replaceable Electrode Probe BNC Water Quality Monitoring Tester Kit Aquarium Hydroponics Spa Tank Pool Laboratories

2-in-1 Chlorine & PH Meter Swimming Pool Tester, Handheld CL2 Level Meter Test Spa Water Quality Analysis Monitoring Monitor Analyzer

GAIN EXPRESS Waterproof pH Meter pH Pen Ultra-Long Electrode for Soil, Water, Food, Dual Display with ATC One-Touch Auto Calibration Data Hold Function

Moisture Absorbing Silica Beads For Ozone Generator

Digital 0-30 Grain Moisture Meter Tester Handheld with Case LED Indicator Checker Cup Sensor for 22 Species Seed Rice Coffee Soya Bean Wheat Corn Hygrometer Humidity

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

5-in-1 Water Quality Multi-Parameter PH EC CF TDS Temperature Test Meter Backlight, Wall-mountable Rechargeable Continuous Monitor Tester, Aquariums Hydroponics Pool Fish Tank Pond Drinking

PH & Temperature 2-in-1 Continuous Monitor Meter w/Backlight Replaceable Electrode, Dual Display 0.00 14.00pH C/ F Water Quality Monitoring Kit, for Aquariums Hydroponics Pools Tanks Spa

0-28 Salinity Refractometer ATC, Sodium Chloride Salt Level Meter Tester, Test Kit for Sea Water Brine Seawater Food Industry Pickle Soy Sauce, 0.2 Accuracy

Portable Digital High Accuracy 3-in-1 Water Quality Meter

6-in-1 Waterproof pH/ORP/TDS/EC /Salinity/Temp Meter Pocket Size Multi-Parameter Water Quality Tester Kit Replaceable ORP Probe

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

Gain Express 3-in-1 ORP PH Temperature Combo Meter Tester, Pen Type ATC -1999 1999mV 0.00-14.00pH 0 50 C, Water Quality Aquarium, Tank, Swimming Pool, Lab, Spa

Digital 4 Channels K Type Thermocouple Thermometer with Metal & Bead Probes, Handheld with Backlight, High Temp Meter Tester Multi Measurement Instrument Tool

6.0X Magnification Dental Loupes, Prismatic Keplerian Style Nickel Alloy Frame, 45mm Field of View+ 25mm Depth of Field Loupe+ 420mm Working Distance, Flip-Up Flexible Optical Glass Loupe

Light, Portable and IP65 Waterproof USB Data Logger for Temperature, Humidity and Atmospheric Pressure, with Built-in Software to Generate PDF and Excel Reports

Gain Express AZ Instruments 4 Channel K Type Thermometer SD Card Data Logger Thermocouple Temperature + 2 Bead Type K-Thermocouple Probe

Gain Express Soil Ph & Moisture Meter 295mm Long Electrode

Digital CO2 Carbon Dioxide IAQ Monitor Controller with Relay Function 4.5m Cable NDIR Sensing Probe for Green House Home, Office, Factory

Desktop 3 in 1 Carbon Dioxide/ Relative Humidity/ Temperature Meter, CO2 ppm RH C/ F Indoor Air Quality Monitor, for Home Grow Growing Room Continuous Monitoring Clock with Date & Time

Indoor Air Quality 9999ppm Digital Carbon Dioxide Temperature Humidity NDIR Sensor IAQ CO2 Monitor WB DP Tester

CO2 Monitor Air Quality Monitor for Carbon Dioxide Humidity Tempeture NDIR Sensor CO2 Meter Controller with Relay Function for Grow Room Home Office

Tread Depth Gauge Finder Magnetic Self Standing 80mm

CO2, RH & Temp Real-Time Monitor Kit Set w/PC Software Recording Analyzer, Portable Indoor Air Quality Carbon Dioxide Meter Sensor, Temperature/Dew Point/Wet Bulb/Humidity

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

3-Axis Gauss EMF ELF Meter Detector, Electromagnetic Field Radiation Intensity 20/200/ 2000 mG & uT, Frequency 30 2000 Hz, Handheld Portable Gauge for Microwave Computer Monitor Power Line

Gain Express 0-10 Brix Refractometer with ATC Low-Concentrated Sugar Solutions Accuracy 0.1 Synthetic Machining Coolants Maple Sap Cutting Liquid CNC Maple Syrup Makers Tea

3-in-1 Honey Refractometer Brix/Moisture/Baume Tester Meter ATC, Tri-Scale 58-90 /12-27 /38-43Be', Sugar Water Content Level Beekeeping Maple Syrup, Test Kit w/Calibration Oil & Block

Gain Express ORP Redox Meter Tester -1999 1999mV, 1-Point Calibration, Oxidation Reduction Potential, Aquariums, Swimming Pools, Water Treatment Systems, Aquaculture, Spa

Digital Angle Finder Gauge Magnetic Protractor Level Box Inclinometer Gauge with Magnets, Mini Cube Portable Tool for Carpenters Craftsman Woodworking Home Renovation DIY

Digital Power Meter Wattmeter Energy Consumption Meter Watt Voltage Current Frequency Electricity Usage Monitor Plug-in Socket Design

Gain Express Foldable Chelsea Jadelite Filter Gem Identifier Tool Gem Testing Gemstone Tool

Professional Decibel Meter, Digital Sound Level Meter with Backlight Display High Accuracy

Digital Manometer with USB Interface, Differential Pressure Gauge, Air Pressure Testing Instrument Tester, 11 Measurement Units

10X Illuminated Jewelers Loupe Magnifier with Interchangeable Reticle Scale, LED Light, 25mm Field of View, for Jewelry, Gems, Coins, Hobby Tool

Portable Mini Paint Thickness Meter Tester LCD Car Coating Gauge Paint, Enamel, Plastic, Epoxy, Steel or Aluminum

Professional Anemometer Datalogger Wind Speed Velocity Meter Air Flow CFM CMM Air Volume Wind Direction Temperature Humidity Measurement Digital Tester Gauge with MAX / MIN / AVG Value, Data Hold

Dual LCD with Multifunction Indicators Pocket Type Thermo-Anemometer

Digital 2 Channels K-Type Thermometer 2 Thermocouples -50 1300 C Handheld High Temperature Kelvin Scale Dual Measurement Meter Sensor

Automatic Circuit Breaker Finder Tracer AC circuits/Fuses, LED Signal Receiver Transmitter Fuse Socket, Plugs, Lighting, Lamp Socket & Outlet Adapters

GAIN EXPRESS Circuit Breaker Finder Tracer Locate AC Circuits & Fuses Quickly, Circuit tester LED Auto-Sensing Receiver Transmitter, Fuse Socket, Plugs, Lamp Socket & Outlet Adapters 100-120V Only

Digital Bevel Box Inclinometer with Magnets & Always Upright Display Protractor Large LCD Backlight Function Carpentry Building Masonry Construction

Digital 2 Channels K-Type Thermometer w/ 4 Thermocouples , -50 1300 C Handheld Desktop High Temperature Kelvin Scale Dual Measurement Meter Sensor