Product Features

Measures DO in mg/ L or % saturation, plus 7 other parameters
Automatic salinity compensation and manual barometric pressure compensation for increased accuracy
Waterproof IP57-rated housing is ideal for field use
Product Type: Dissolved Oxygen
Meter style: Portable
Dimensions ( " W) : 2-5/ 8
Dimensions ( " H) : 4-3/ 4
Dimensions ( " D) : 1-1/ 8
Range ( pH) : -2.00 to 19.99
Range ( mV) : ± 1999
Range ( Conductivity) : 0.00 to 199.9 mS
Range ( TDS) : 0 to 100 g/ L
Range ( Salinity) : 0 to 100 ppt
Range ( Resistivity) : 0 to 100 M ohm
Range ( Dissolved oxygen) : 0 to 40.00 mg/ L, 0 to 200% 
Range ( Temperature ° C) : 0 to 100
Range ( Temperature ° F) : 32 to 212
Resolution ( pH) : 0.01
Resolution ( Temperature) : 0.1° C/ ° F
Resolution ( mV) : 1
Resolution ( Conductivity) : 0.01
Resolution ( TDS) : 0.01
Resolution ( Resistivity) : 0.1
Resolution ( Dissolved Oxygen) : 0.01 mg/ L, 0.1% 
Resolution ( Salinity) : 0.01
Accuracy ( pH) : ± 0.02
Accuracy ( Temperature) : ± 1° F ( ± 0.5° C) 
Accuracy ( mV) : ± 0.15
Accuracy ( Resistivity) : ± 1.5% FS
Accuracy ( Conductivity) : ± 1.5% FS

Specification: 

Measures Dissolved Oxygen concentration/ saturation, pH, mV, Conductivity, TDS, Salinity, Resistivity and Temperature
Automatic salinity compensation and manual barometric pressure compensation for DO measurements
One button pH calibration ( 4, 7, and 10pH) 
Choice of 3 point pH calibration for better accuracy
One point Conductivity calibration - automatically recognizes 8 calibration solutions from USA, Europe and China series
Automatic Temperature Compensation ( non-linear compensation for purified water < 10µ S/ cm to improve measuring accuracy) 
Memory stores up to 400 readings with series number, measured value and temperature
Large blue backlit dual LCD display
Auto power off saves battery life with disable function
Waterproof housing
Complete with DO probe, pH/ mV/ Temp electrode, polymer Conductivity cell, pH and Conductivity calbration solutions, batteries and hard carrying case