#gain express

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

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

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

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

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

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

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

Moisture Absorbing Silica Beads For Ozone Generator

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

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

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

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

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 Oxidation-Reduction Potential REDOX 256mV Calibration Solution 50ml

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

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

2 in 1 pH ORP Redox Controller Monitor w/Output Power Relay Control Water Quality Meter Electrode Probe BNC & Continuous Measurement Kit for Aquarium Hydroponics Plant Pool Spa

Digital Indoor Air Quality 9999ppm Temperature Humidity NDIR Sensor Carbon Dioxide CO2 Wet Bulb Dew Point CO2 Air Monitor Tester Indoor Air Quality Diagnosis

GAIN EXPRESS Fiber Optical Cable Inspection Handheld Microscope Include 2.5mm Adaptor and 1.25mm Adaptor 400x Magnification

Alcohol Refractometer with ATC 0 80 VOL Volume, Optical Handheld Concentration Tester Meter for Distilled Beverages Making Homebrew

15x 21mm Optic Glass Loupe 6 LED & UV Magnifier Jeweler Foldaway Pocket Black Frame Triplet Lens Magnifying Gem Jeweler

Gain Express Pocket Diffraction Grating Gemological Spectroscope for Quick Gemstone Identification and GIA Use

Gain Express Professional Digital Large LCD Dissolved Oxygen DO Meter Water Quality Tester with ATC 99 Memory Function

Gain Express Portable 0-100HD Shore D Hardness Tester Meter Digital Durometer Scale for Rubber, Tire, Plastic, Thermal Plastic, Flooring, Bowling Ball with Large LCD Display

360 Digital Long Level Inclinometer Angle Finder Ruler Protractor 42cm with Magnets/ Backlight/ Vertical & Horizontal Spirit Bubble for Construction Carpenter Craftsman Renovation Home Professional

Digital Salinity & Temperature Meter with ATC, Handheld Pen Type Water Quality Measurement Monitor Tester, 0 70 PPT, for Saltwater, Hydroponics, Pool, Aquarium, Fish Pond, Spa, Monitoring & Testing

High Accuracy pH Electrode with Calibration Powder, 0-14 pH Probe with BNC Connector & 300cm Cable for Wide Application

Gain Express ORP Redox Meter Tester -1999 1999mV, 1-Point Calibration, Oxidation Reduction Potential

2 in 1 Non-contact Digital Tachometer Gauge Auto Ranging 0.5 99, 999 RPM Range Meter Speed Tester

Digital EMF Tester Electric and Magnetic Field Radiation Detector Temperature Measure with Color-Screen Display and Rechargeable Battery Handheld Tool

Portable Digital Grain Moisture Meter, Compact High Quality Rice Corn Wheat Tester Analyzer- Range 5 30 , Temperature -14 140 F with LCD Display, Hygrometer Humidity

Dual Scale Salinity Refractometer ATC 0-100ppt & 1.000-1.070 Specific Gravity, Portable Meter Tester for Seawater Salt Sea Water Aquarium Brackish Reef Tank Marine

Gain Express Illuminated Diamond Tester

Gain Express 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

Landtek Instruments Digital Vibration Meter Gauge Tester Analyzer

5 in 1 Ph Temperature Conductivity TDS Salt Combo Pen Type Salinity Meter

Pentype 2-in-1 TDS/EC Meter with ATC Digital Water Quality Tester Temperature Measurement for Water Analysis Hydroponics Aquaculture

Pentype TDS/Salinity/Temperature Tester Water Quality Meter ATC Multiple Units Digital Tool for Saltwater Monitoring & Testing IP65 Waterproof Housing

Digital 18mm Thickness Window Tint Meter 100 Range Glass Plastic Visual Light Transmission with Sensor

Gain Express Landtek Instruments Window Tint Meter Visual Light Transmission 18mm Digital Tester

WA-60A Landtek Water Activity Meter Food Water Activity Measurement Portable Digital Tester

Gain Express Digital Light Meter Lux Meter Measurement Range Detachable Sensor 0 to 200, 000 Lux Min/Max/Avg Functions + CD Software w/USB Power Cable

GAIN EXPRESS Decibel Meter Digital Sound Level Meter Professional LCD Sound Noise Meter with 30dB to 130dB A/C Frequency Weighting, for Indoor and Outdoor Measurement

Professional Sound Level Calibrator Decibel Meter Calibrator with Three Calibration Level at 94dB & 104dB & 114dB

Gain Express Compact Pocket Size Digital Shore A Hardness Meter Tester 1-100ha Durometer LCD Display

Manometer Gauge, Digital Air Pressure Meter Differential Air Pressure Gauge Dual Port HVAC Gas Pressure Tester Handheld Portable Tool

Gain Express 0-32 Brix Refractometer ATC High-Concentrated Sugar Solution Content Test Tool 0.2 Division, Homebrew Tester Meter, Brandy Beer Fruits Vegetables Juices Soft Drinks

10 x 21mm Mini Folding Illuminated Loupe Jewelry Magnifier Pocket with LED Light, for Gems Jewelry Jewelers Eye Rocks Stamps Coins Watches Hobbies Antiques Gems