OxyTrend

Electrochemical Oxygen Transmitter

OxyTrend is an Oxygen analyser based on electrochemical sensor. It can be configured as a 2-wire loop powered transmitter or, connecting further 2 or 3 wires, it can also have serial output RS485 ModBus RTU (in alternative or in addition to the analog 4-20 mA).

 OxyTrend can integrate 9 alternative types of sensor, depending on the measure to be achieved (from low traces, up to 100%). All sensors are insensitive to the presence of many background gases and hydrocarbons, making this instrument suitable for a variety of applications.

 Simple, reliable and cost-effective solution to measure O2 in extractive applications in safe and hazardous area (ATEX) Zone 1 / Zone 21

Measureable Gas

Oxygen [O2]

Main Features

High Performances

• Two-wire, loop powered 4-20 mA transmitter
• Four or five-wire connection in case of use of the RS485 serial interface or 4-20 mA + RS485 respectively
• ModBus RTU Master or Slave selectable by menu
• Connectable with the ADEV 8RO4DI external module by RS485 to have 8 relays output and 4 digital inputs
• Unique hardware for all wiring connection types
• Optical through-the-glass buttons allowing menu operation without opening the housing
• Graphical LCD Display with visualization in Auto-Range and possibility to switch to trend visualization
• Use friendly menu and intuitive interface
• High Accuracy Galvanic Sensors
• Microprocessor-based technology and inner routine of electronic zero autocalibration
• User selectable range
• The version for hazardous area application is Ex-Proof and doesn’t require any Zener barrier in non-hazardous location
• Low Maintenance
• Sensor lifetime indication
• NAMUR error indication

9 Different sensors

European Compliance

• Low Voltage Directive 2014/35/EU
• EMC Directive 2014/30/EU
• Directive ATEX 2014/34/EU

ATEX

ATEX certification for Zone 1 / Zone 21 with protection mode:

II 2 G D     Ex db IIC T6 Gb

Ex tb IIIC T85°C Db

IP65

ATEX Certificate Number CESI 20 ATEX [Pending]

Specification

Applications

Trace O2 in pure gases

Natural Gas & Biogas

Glove box purge and leak detection

Annealing furnaces

Air separators

Nitrogen & Hydrogen generators

Pure gaseous hydrocarbons streams

Chemical & Petrochemical

Steel & Metal processing

Reducing processes

Welding gases

Inerting control

Semiconductor wafer machines

Heat treatments

Sampling System

OxyTrend needs an external sampling system able to deliver an almost clean sample gas to the analyser at the proper temperature, pressure and flow rate.

ADEV has a wide experience in process and can provide the EC9600 transmitter combined with a sample and condition system designed for the specific application requirements. Contact ADEV for details.

Measuring Principle

ADEV sensors are specific for Oxygen. They measure the partial pressure of Oxygen from low ppm to 100% levels in inert gases, gaseous Hydrocarbons, Helium, Hydrogen, mixed gases, acid gas streams and ambient air.

Oxygen, the fuel for this electrochemical transducer, diffusing into the sensor reacts chemically at the sensing electrode to produce an electrical current output proportional to the Oxygen concentration in the gas phase. The sensor’s signal output is linear over all ranges and remains virtually constant over its useful life.