VTSYIQI Portable NO2 Gas Detector Nitrogen Dioxide Gas Analyzer with Built-in Pump Measuring Range from 0 to 20ppm L-alarm 5ppm H-alarm 10ppm Resolution 0.1ppm Accuracy ≦±5% F.S. 1200pcs Data Records for Detecting Gas in Many Industries

VTSYIQI Portable NO2 Gas Detector Nitrogen Dioxide Gas Monitor with Range from 0 to 20ppm Excellent-quality Sensor L-alarm 5ppm H-alarm 10ppm Resolution 0.1ppm Self-adjustment Function LCD Display Screen Advanced MCU Control with Low Power Consumption

VTSYIQI Portable O2 Gas Detector Oxygen Analyzer with Range 0-30%vol Resolution 0.1%vol L-alarm 19.5%vol H-alarm 23.5%vol 1200pcs Data Records Accuracy ≦±5% F.S. Built-in Pump Display Screen for Detecting Gas in Many Industries

VTSYIQI Portable O3 Detector Ozone Gas Detector with 32-bit Built-in MCU High Reliability and Self-adaptation Ability Measuring Range 0-20ppm Resolution 0.01ppm L-Alarm 5ppm H-Alarm 10ppm for Petroleum Chemical Environmental Metallurgy

VTSYIQI Portable O3 Gas Detector Handheld Ozone Gas Detector with Accuracy ≤±3% F.S.Measuring Range 0-10ppm Resolution 0.01ppm Response Time ≤30s Sound and Light Alarm Built-in Micro Sampling Pump Built-in Water Vapor Dust Filter

VTSYIQI Portable O3 Gas Detector Ozone Gas Detector with Measuring Range 0-100ppm Accuracy ≤±3% F.S.Resolution 0.01ppm Principle Electrochemical Sound and Light Alarm Data Logging Function for O3 Gas Test

VTSYIQI Portable Optical Dissolved Oxygen Meter Fluorescence Dissolved Oxygen Meter with 5m Probe Solution 0.1 (mg/L) Dissolved Oxygen Measurement Range 0~15mg/L or 0~119.9% Altitude Compensation 0~1000m

VTSYIQI Portable Optical Dissolved Oxygen Meter Fluorescence DO Meter with 3.5m Probe Measuring Range 0.0-15.0 (mg/L)/0-119.9% Solution 0.1 mg/L Accuracy ±3.0% Manual Data Logging 99 Entries

VTSYIQI Portable Optical Dissolved Oxygen Meter Fluorescence DO Meter with 5m Probe Dissolved Oxygen Measurement Range 0~15mg/L or 0~119.9% Salinity Compensation 0~42ppt Calibration 100.0% in Air

VTSYIQI Portable Optical Dissolved Oxygen Meter with Probe 3.5m 99 Points Records Dissolved Oxygen Measurement Range 0~15mg/L or 0~119.9% Solution 0.1 (mg/L) Altitude Compensation 0~1000m

VTSYIQI Portable ORP Meter Handheld ORP Meter with Conductivity Standard Solutions ORP Resolution 0.1/1 mV Selectable Accuracy ±0.2 mV Range -1999.9 to 1999.9 mV USB Communication Interface Backlit LCD Display Measurement Modes Relative / Absolute mV

VTSYIQI Portable ORP Meter Lab ORP Meter with Standard Calibration Solutions Auto-read Function USB Communication Interface Expanded Memory Stores ORP Range -1999.9 to 1999.9 mV Resolution 0.1/1 mV Selectable Accuracy ±0.2 mV 1 Point Calibration