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ZD-06 Soil pH & Moisture Tester Meter with 295mm Long Electrode Probe Waterproof Soil Tester Kit Tools, for Indoor & Outdoor Gardens Plants Flowers Farming

DMT-3 High Accuracy Professional Diamond Moissanite Tester Gemstone 2pt Jewel Stone Combo Gem Jewelry Test Tool Selection Factory Calibrated Meter Identifier Device

M0199720 6-in-1 Water Tester Combo Pen pH, ORP, EC, TDS, Salinity, & Temperature

FFW-718 Lucky Portable Wireless Fish Finder Locator with 45m (135ft) Depth & 120m (400ft) Wireless Range, Display Water Temperature/ Fish Size & Location, Fishing Gear Tools for Fresh & Salt water, Ocean, Sea, Lake, River, Ice Icy Water, 90° beam angle

CLMG-7173_LED Magnifier Scale Loupe 10x Magnification 8 LED Light 20mm Scale Chart & 25mm Field of View

836-1 Digital Conductivity TDS Meter, ppm ppt uS mS °C/°F Pentype Water Quality Tester with ATC

88598 Digital 4 Channels K-type Thermocouple Thermometer SD Card Logger High / Low Alarm Big LCD Display

560-10A Shore A Digital Hardness Meter Durometer 0~100HA, Rubber Tire with LCD Display Pocket Size Tester

SLM-25 Sound Level Meter with Backlit Display High Accuracy Measuring 30dB~130dB with Data Logging Function Instrument Compact Professional

E-1325M 0-14 pH Electrode Probe BNC Connector, 300cm Cable for PH Meter Monitor Controller Test Sensor, Replacement Kit for Aquarium Hydroponics Plant Pool Spa

868-5 Waterproof pH meter with Temperature + Auto Calibration

7755 Digital CO2 Carbon Dioxide Temperature RH Humidity DP WB NDIR Sensor Indoor Air Quality 9999ppm USB Monitor Logger

AG-82413B Digital Protractor Angle Finder Level Inclinometer Magnetic V-Groove 0~360 with Backlight IP65

8403 Professional Digital Large LCD Dissolved Oxygen DO Meter Tester Handheld Water Quality Tester with Temperature Measurement

OZX-300AT O3 Generator w/ Built-in Air Pump Timer, Ozone Output 500mg/hr

CO22 Carbon Dioxide / Temperature/ Humidity Indoor Air Quality Monitor Meter, Wall Mountable CO2 Detector 0~2000ppm Range

CO98 CO2 Data Logger Temperature Humidity Monitor 9999ppm

710-110 / BAT-377 Battery Tester Checker C AA AAA D N 9V 1.5V Button Cell Batteries Clear Bar Graph LCD Display Pocket Size

G0182105-JY4 Digital Angle Finder Level 360° Spirit Level Upright Inclinometer with Magnets Protractor Ruler

ND-9 Handheld Digital Sound Noise Level Tester Calibrator for Sound Level Meter 94dB & 114dB output Class I w/ Battery +/-0.3 db Accuracy for microphone , sound measuring system for acoustics field and laboratory use