VTSYIQI Portable Oxygen Gas Detector Fixed O2 Gas Monitor with Wall-mounted Installation Method Resolution 0.1%vol Range from 0 to 30%vol Output Current 4-20mA L-alarm 19.5%vol H-alarm 23.5%vol for Gas Field Spray Paint Gas Detection

VTSYIQI Portable Oxygen Gas Detector O2 Gas Leak Alarm with Resolution 0.1%vol Range 0-30%vol L-alarm 19.5%vol H-alarm 23.5%vol Pump Sampling Method 32-bit Built-in MCU High-sensitivity Sensor for Testing Combustible Gas

VTSYIQI Portable Ozone Gas Detector O3 Gas Monitor with Measuring Range 0-100ppm Resolution 0.1ppm  Sound & Light Alarm Standard 4-20mA and RS485 Output Wall-Mounted Installation

VTSYIQI Portable Paper Moisture Content Meter Paper Moisture Analyzers with Accuracy ± 0.5(Main Moisture Range) Resolution 0.1 or 0.01 Measuring Range 0.00-2.00%(d) 0.0-98.0%(s) Digits LCD with Backlight for Corrugated Paper,Cartons,Paper Rolls,Etc

VTSYIQI Portable Paper Moisture Meter Handheld Paper Moisture Analyzer with Digital Display with Back Light Measuring Range 0.00-2.00%(d) 0.0-98.0%(s) Accuracy ± 0.5(Main Moisture Range) Resolution 0.1 or 0.01 for Measure Different Kinds of Papers

VTSYIQI Portable Paper Moisture Meter Handheld Paper Moisture Tester with Measuring Range 0.00-2.00%(d) 0.0-98.0%(s) Accuracy: ± 0.5(Main Moisture Range) Digits LCD with Backlight For Measure Different Kinds of Papers

VTSYIQI Portable Pen Type Hardness Tester Gauge Hardness Test Pen with Tungsten Carbide Test Head for Measure and Record The Hardness of Various Materials

VTSYIQI Portable pH and Temperature Meter Analyzer with Calibration Liquids Range -2.00 to 20.00 pH Calibration 1 to 3 points Accuracy ±0.01 pH Range -1999 to 1999 mV Accuracy ±1 mV USB Communication Interface Automatic Temperature Compensation

VTSYIQI Portable pH Conductivity Dissolved Oxygen Meter With Standard Calibration Fluids Accuracy ±0.002 pH For Measuring pH Oxidation Reduction Potential Ion Concentration Conductivity Salinity Resistivity and Dissolved Oxygen

VTSYIQI Portable pH Ion Meter Analyzer with Standard Calibration Fluid P11 Glass pH Electrode Contains pH ORP and Ion Measurement Modes Accuracy ±0.002 pH ±0.2 mV Data Storage Function ppm mg/L MOL/L Units

VTSYIQI Portable pH Meter Analyzer Tester with Standard Calibration Solution pH Range -2.00 to 20.00 pH Resolution 0.01 pH Accuracy ±0.01 pH mV Range -1999 to 1999 mV 1 to 3 Points Calibration Automatic Temperature Compensation Expanded

VTSYIQI Portable pH Meter Digital Water pH Analyzer with Calibration Liquids pH Range -2.00 to 20.00 pH mV Range -1999 to 1999 mV Resolution 0.1 (0 to 999.9mV), 1 (1000 to 1999mV) USB Communication Interface