Measuring Method: 
+ pH: Glass electrode 
+ DO: Membrane type galvanic cell
Display: LCD (Dual Channel)
Meas. Range:
+ When using standard membrane 
pH: 0.00 - 14.00
ORP: 0 - ± 2000mV
Temperature: 0 - 100.0 °C
DO: 0.00- 20.00 mg/L
Saturation Rate: 0-200%
Temperature: 0-50.0 °C

+ When using high concentration membrane
pH: 0.00 - 14.00
ORP: 0 - ± 2000mV
Temperature: 0 - 100.0 °C
DO: 0-50.0 mg/L
Saturation Rate: 0-500%
Temperature: 0-50.0ºC

Display Range:
+ When using standard membrane 
pH: -2.00 - 16.00
ORP: 0 - ± 2200mV
DO: 0-22.00 mg/L
Saturation rate: 0-220%

+ When using high concentration membrane 
pH: -2.00 - 16.00
ORP: 0 - ± 2200mV
DO: 0-55.0 mg/L
Saturation Rate: 0-550%
Temperature: -5°C-110°C

Repeatability:
+ When using standard membrane 
pH: ± 0.02pH
ORP: ± 2mV
DO: ± 0.03mg / L
Saturation rate: ± 2%

+ When using high concentration film 
pH: ± 0.02pH
ORP: ± 2mV
DO: ± 0.02mg / L
Saturation: ± 2%
Temperature: ± 0.2 °C

Temperature Compensation:
pH: Manual or automatic
DO: Auto
ORP: Not applicable

Calibration:
pH: Capable of three point calibration
DO: Zero/span calibration

Temperature calibration: 1 point
Correction function: Salinity correction / Atmospheric pressure correction
Data Memory: 1000 data points
Automatic Hold Function: Provided
Interval Memory Function: Provided (can be set between 1 second - 99 minutes 59 seconds or 2 seconds - 99 hours 59 minutes)
Clock Function: Provided (To be shown while conducting a measurement)
Printing Function: Can connect to the ESP-P30 printer (option)
Connectable Devices: PC or external printer ESP-P30 (option) 
Waterproof Construction: IP67 (can be immersed in water at a depth of 1m and within 30 minutes)
Performance compensation temperature: 0-45 ° C
Power Source: AA alkaline batteries / Nickel-Hydrogen batteries (2 pieces) or special AC adapter (6VA option), use in 400 hours
Power Consumption: 0.014W (when using 3V battery)
Dimensions: 68 x 35 x 173mm
Mass: 300 g

This product is used to measure DO, pH, ORP, temperature in laboratory