VTSYIQI Portable Methane Gas Detector CH4 Gas Leak Detector Monitor with Measuring Range 0-5%vol L-alarm 50ppm H-alarm 150ppm Accuracy ≦ 5% F.S. Explosive Proof Housing

VTSYIQI Portable Micro-Ohmmeter DC Low Value Resistance Tester with 200 Groups Data Storage Resistance Range 1uΩ~200Ω Test Current 5A MAX for Measuring The Connection Resistance Between Conductors Connected at Ground Grids Poles

VTSYIQI Portable Micro-Ohmmeter Equipotential Tester Micro Ohm Meter with Resistance Range 1uΩ~200Ω 200 Groups Data Storage Test Current 5A MAX Battery Capacity 7000mAh Rechargeable Lithium Battery Measure Time 2 seconds / time

VTSYIQI Portable Multi Parameter Water Quality Analyzer PH/Conductivity Meter with Conductivity Standard Solutions Range -2.000 to 20.000 pH Accuracy ±0.002 pH USB Communication Interface for Measuring pH mV Conductivity TDS Temp

VTSYIQI Portable Multi Parameter Water Quality Analyzer Water Quality Meter with Calibration Liquid Range -1999.9 to 1999.9 mV Automatic Temperature Compensation for Measuring pH ORP Ion Concentration Conductivity TDS Salinity Resistivity DO

VTSYIQI Portable Multi Parameter Water Quality Meter Multi Parameter Water Quality Analyzer with USB Communication Interface Conductivity Standard Solutions for Measuring PH,Oxidation Reduction Potential,Conductivity,TDS,Salinity,Resistivity

VTSYIQI Portable Multi Parameter Water Quality Meter Portable Water Monitor with Standard Calibration Fluids Range -2.000 to 20.000 pH Resolution 0.001 0.01 0.1 pH Selectable USB Communication Interface Auto-Read Function Stores Up to 500 Data Sets

VTSYIQI Portable Multi Parameter Water Quality Meter Tester with Calibration Solutions for Measuring pH ORP Ion Concentration Conductivity TDS Salinity Resistivity Dissolved Oxygen Range -2.000 to 20.000 pH Accuracy ±0.002 pH

VTSYIQI Portable Multiparameter Water Quality Analyzer Multi Parameter Water Quality Analyzer with Conductivity Standard Solutions Calibration Solutions 10 µS/84 µS/1413 µS/12.88 mS/111.8 mS Automatic Temperature Compensation

VTSYIQI Portable Multiparameter Water Quality Analyzer Multi-Parameter Water Quality Meter with Range -2.000 to 20.000 pH Accuracy ±0.002 pH USB Communication Interface Conductivity Standard Solutions for Measuring pH ORP Dissolved Oxyge Temp

VTSYIQI Portable Multiparameter Water Quality Analyzer Multiparameter Water Quality Meter with Conductivity Standard Solutions Range 0 to 20.00, 200.0, 2000 µS/cm 20.00 200.0 mS/cm for Measuring Conductivity TDS Salinity Resistivity DO

VTSYIQI Portable Multiparameter Water Quality Analyzer Water Quality Meter with Conductivity Solutions Accuracy ±0.002 pH Range -1999.9 to 1999.9 mV Manual/Auto-Read Measurement Endpoint USB Communication Interface for Measuring pH mV Conductivity TDS