Lutron PDO-8220 – High-Precision Dissolved Oxygen Meter

Lutron PDO-8220 – High-Precision Dissolved Oxygen Meter

Lutron PDO-8220 – High-Precision Dissolved Oxygen Meter with Dual Relay and PC Connectivity

The Lutron PDO-8220 is a professional-grade dissolved oxygen (DO) meter equipped with a polarographic sensor, automatic temperature compensation, and LED display. Designed for critical applications such as aquaculture, water treatment, laboratories, and food processing, this instrument offers precise readings and automation features to ensure reliability and efficiency in demanding environments.

---

Key Features

• Multi-function capability to measure:

  • Dissolved oxygen (DO) from 0 to 50.0 mg/L

  • Oxygen in air from 0 to 100.0%

  • Temperature from 0 to 50℃

• High-precision polarographic sensor ensures stable and accurate results with automatic temperature compensation (0–50℃)

• Clear and durable 4-digit red LED display with 14 mm digit height for easy visibility in various environments

• One-touch automatic calibration for dissolved oxygen simplifies setup and use

• Two built-in relay outputs for process control:

  • Relay 1 for DO level control

  • Relay 2 for temperature control

  • Adjustable high/low limits and hysteresis settings for both DO and temperature

• RS232 connectivity for data transfer to a computer for logging and further analysis

---

Technical Specifications

• Display: 4-digit red LED, digit height: 14 mm

• Measurement ranges:

  • Dissolved Oxygen: 0 to 50.0 mg/L

  • Oxygen in Air: 0 to 100.0%

  • Temperature: 0 to 50℃

• Resolution:

  • DO: 0.1 mg/L

  • Oxygen in Air: 0.1%

  • Temperature: 0.1℃

• Accuracy (at 23 ± 5℃):

  • DO: ±0.4 mg/L

  • Oxygen in Air: ±0.7%

  • Temperature: ±0.8℃ / ±1.5℉

• Sampling time: Approximately 1 second

• Adjustable settings:

  • High limit setting for DO and temperature

  • Low limit setting for DO and temperature

  • Hysteresis value setting

  • Temperature offset adjustment

• Relay outputs:

  • Two relays

  • Max load: 0.5 A at 250 VAC / 0.5 A at 24 VDC

  • Exceeding the load limit may cause permanent relay damage

• Probe (optional):

  • Polarographic type oxygen probe

  • Size: 190 mm length x 28 mm diameter (7.5″ x 1.1″)

  • Weight: 209 g (0.46 lb)

• Compensation and adjustment ranges:

  • Temperature: 0 to 50℃ (automatic)

  • Salt concentration: 0 to 39%

  • Altitude: 0 to 3900 meters

---

Ideal Applications

• Aquaculture and fisheries: Maintain optimal oxygen levels to support aquatic life

• Food and beverage industry: Ensure water used in processing meets hygiene standards

• Laboratories and education: Support accurate scientific experiments and environmental studies

• Water treatment facilities: Monitor DO levels to optimize treatment processes

---

Summary

The Lutron PDO-8220 is a reliable and highly accurate dissolved oxygen meter designed for professional use across multiple industries. With its precision polarographic sensor, automatic temperature compensation, dual control relays, and RS232 data output, it offers a robust and efficient solution for monitoring oxygen in water and air. Ideal for aquaculture, laboratory research, water treatment, and food industry applications, this instrument combines accuracy, durability, and ease of use in one complete package.