ODO RTU

An easy way to install YSI ODO™ technology at your site, tank, or pond.

• Overview

  Engineered specifically for aquaculture applications, but at home in any Modbus system, the optical dissolved oxygen (ODO) sensor can be used to ensure adequate oxygen levels for your livestock or for improved energy efficiency. With YSI’s ODO RTU, you’ll benefit from reduced costs, less maintenance, and better data.

  ODO RTU utilizes the most advanced DO technology and can be connected anywhere without the need for special connectors. Additional inputs for barometric pressure and salinity are used to accurately calculate the DO% and mg/L. ODO RTU is also availabale with built-in conductivity measurement to automatically compensate for salinity.

  • Connect directly to your PLC or data logger and communicate via Modbus
  • Highly-accurate ODO sensor technology with no stirring
  • 2-year cable and probe warranty with user-replaceable DO cap

• Specifications

  Communication	Modbus/RS485 (4 wire)
  Default Baud Rate	9600 (user programmable)
  Dissolved Oxygen (Optical luminescence) Units	Range  0 to 500%, 0 to 50 mg/L Accuracy  0 to 200%: ±1% of reading or 1% saturation, whichever is greater; 200 to 500%: ±8% of reading; 0 to 20 mg/L: ±0.1 mg/L or 1% of reading, whichever is greater; 20 to 50 mg/L: ±8% of reading Resolution   0.01 mg/L and 0.1 %, or 0.1 mg/L and 1% (auto-adjusted based on range)
  Power	10 V to 16 V DC, 15 mA max
  Size	2.46 cm diameter, Cable options for 1, 4, 10, 20, 30, 50, and 100 m lengths
  Temperature (Thermistor) Units	Range  –5 to 70°C (-5 to 50°C; DO compensation range for mg/L ) Accuracy  ±0.2°C Resolution   0.1°C or 0.1°F (auto-adjusted based on range)
  Warranty	2 years on cable, probe, and ODO sensor cap

  Additional Conductivity Specifications
  Conductivity (Four nickel electrode cell) Units: μS/cm, mS/cm	Range  0 to 200 mS/cm Accuracy  0 to 100 mS/cm ±0.5% of reading or 0.001 mS/cm, whichever is greater; 100 to 200 mS/cm ±1.0% of reading Resolution   0.001, 0.01, or 0.1 μS (range dependent)
  Salinity Units: μS/cm, mS/cm	Range  0 to 70 ppt Accuracy  ±1.0% of reading or ±0.1 ppt, whichever is greater Resolution   0.01 ppt

• Specification Sheets
  • ODO RTU Specification Sheet | XA00138