Dissolved Oxygen Meter Oxi 340i - Excellent

Comprehensive Oxygen Measurement with the WTW Oxi 340i

The WTW Oxi 340i is a cutting-edge handheld meter specifically designed for measuring dissolved oxygen (D.O.) in water. With its compact dimensions of 172 mm in length, 80 mm in width, and 37 mm in height, this device weighs only 0.3 kg, making it highly portable and easy to use in various environments. The Oxi 340i is engineered for robustness, boasting an IP 66 protection class that shields it from dust and water ingress, ensuring reliable performance even in challenging conditions. 

One of the standout features of the Oxi 340i is its capability to measure multiple oxygen-related variables, including D.O. concentration (mg/l), saturation (%), and partial pressure (mbar). This versatility makes it suitable for a wide range of applications, from aquaculture and wastewater treatment to environmental monitoring and research laboratories. The device operates efficiently in a wide temperature range, from -10 °C to +55 °C, with storage capabilities of -25 °C to +65 °C, accommodating various field conditions.

For accurate measurements, the Oxi 340i incorporates calibration and temperature compensation features. Its proven OxiCal® calibration procedure ensures that users can achieve consistent results, while the special AutoRead function simplifies operation by automatically capturing stable readings. Accuracy is paramount in oxygen measurement, and the Oxi 340i delivers with a concentration accuracy of ± 0.5% of the measured value under specified conditions. This precision is particularly crucial in sensitive environments where slight variations in oxygen levels can significantly impact aquatic life.

The device also offers effective salinity correction within a range of 0 to 70.0 SAL, which is vital for measuring oxygen levels in saline waters. Furthermore, it automatically adjusts for air pressure variations through an integrated pressure sensor, enhancing measurement reliability at different altitudes.

Designed with user comfort in mind, the Oxi 340i features an intuitive interface that allows users to navigate settings and view measurements easily. The device supports both battery and mains operation, ensuring flexibility in power sourcing. The operational life of approximately 3000 hours with 4 x 1.5 V alkali-manganese batteries provides extended usability in the field, while plug-in power supply options accommodate various regional standards (Euro, US, and UK).

In terms of connectivity, the Oxi 340i is equipped with analog and serial output options, allowing seamless integration with data loggers and printers for data recording and reporting. The serial interface, featuring an RS 232 connection, supports selectable baud rates, making it adaptable for different data transmission needs. The device also offers a maximum cable length of 15 meters, providing flexibility in operational setup.

The Oxi 340i adheres to stringent safety and quality standards, certified with GS, cETLus, and CE markings. Its protective class III designation ensures safety during operation, giving users peace of mind in various application settings. With a climatic class of 2, the device can function effectively in moderate environmental conditions, further enhancing its versatility.

• Dimensions: Length 172 mm, Width 80 mm, Height 37 mm
• Weight: 0.3 kg
• Type of Protection: IP 66
• Protective Class: III
• Certifications: GS, cETLus, CE
• Storage Temperature: -25 °C to +65 °C
• Operating Temperature: -10 °C to +55 °C
• Climatic Class: 2
• Accuracy:
  • D.O. Concentration: ± 0.5% of the measured value
  • D.O. Saturation: ± 0.5% of the measured value (within ±10 K of calibration temp)
  • D.O. Partial Pressure: ± 0.5% of the measured value
  • Temperature Compensation: < 2% at 0 ... 40 °C
  • Salinity Correction: 0 ... 70.0 SAL
• Air Pressure Correction: Automatic (500 ... 1100 mbar)
• Analog Output: Available (only Oxi 340i)
• Serial Interface:
  • Type: RS 232
  • Baud Rate: 1200, 2400, 4800, 9600 baud (selectable)
  • Data Bits: 8
  • Stop Bit: 2
  • Parity: None
  • Handshake: RTS/CTS + Xon/Xoff
    • Maximum Cable Length: 15m
• Power Supply:
  • Batteries: 4 x 1.5 V AA (alkali-manganese)
  • Operational Life: Approximately 3000 hours
  • Mains Power Supply Options:
    • Euro Plug: Input 230 V ~ / 50 Hz / 5.6 VA; Output 12 V = / 130 mA
    • US Plug: Input 120 V ~ / 60 Hz / 6 VA; Output 12 V = / 150 mA
    • UK Plug: Input 230 V ~ / 50 Hz / 5.6 VA; Output 12 V = / 130 mA