Gasanalyse

OxyTrend Elektrochemischer Sauerstofftransmitter

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 is an Oxygen analyser based on electrochemical sensor. It can be configured as a 2-wire... mehr
Produktinformationen "OxyTrend Elektrochemischer Sauerstofftransmitter"

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

TYPE

CODE

Application

Trace (PPM)

A59014

0-10 ppm low range, used in most industrial applications

Trace (PPM)

A59013

0-10 ppm low range, used when acid gases are present (CO2 > 0.1%, etc.)

Trace (PPM)

A59002

Optimized for extra low traces, 0-1 ppm low range

Trace (PPM)

A59003

Optimized for extra low traces, 0-1 ppm low range when acid gases are present (CO2 > 0.1%, etc.)

Percent

A59021

General purpose O2 Measurement. LDL 1000 ppm, used mainly for long life percent applications

Percent

A59022

General purpose O2 Measurement. LDL 1000 ppm, used when acid gases are present (CO2 > 0.1%, etc.)

Hybrid

A59023

For measuring 20 ppm to 25% with regular exposure to ambient air

Purity

A59025

Designed for measuring elevated O2 (21.0% - 100%)

Trace (PPM)

A59031

0-1 ppm extra low range, optimized for Natural gas  applications (stream with H2S up to 500 ppm)

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]

Spezifikation

Performance Specification

Range

1 ppm ÷ 100% FS (user settable)

Accuracy

± 1% of FS  [note 1]

Repeatability

± 1% of FS  [note 1]

Linearity

± 1% of FS  [note 1]

Resolution

0.005 ppm on 0-10 ppm range

0.01 ppm or percent on other ranges

Compensation

Integrated (temperature)

Sample Flowrate

General purpose: 500-1000 cc/min.

ATEX: recommended 500 cc/min.

Pressure

Vent to atmosphere

Atmospheric pressure effect

± 0.1% of reading per mbar

Cell life

17 ÷ 24 months at 25°C, 1 atm.

Response Time

90% of final FS reading: < 10 sec.

Recovery time

(only for cells for ppm)

If a cell is exposed for 60 sec. in Air, 1 hour of N2 purging it is necessary to go back again < 10 ppm O2

Display

Backlit graphic LCD display with visualization in auto-range

Operative Specification

Output

Loop 4-20 mA (two-wires)

RS485 ModBus RTU (four-wires)

Loop 4-20 mA + RS485 (five-wires)

Relays and Digital Inputs

8 relays + 4 digital inputs (only combined with ADEV 8RO4DI external module)

Operative Temperature

-5°C ÷ +50°C

Protection

IP65

Relative Humidity

90% max.

Power Requirements

16,5 ÷ 30 VDC; max current: 23 mA

Max. Load Resistance (RL)

Depends on applied voltage   [note 2]

Wiring Connections

2 threaded holes 1/2” NPT-F

Pneumatic Connections

Standard: 1/8” NPT-F

Optional: 1/8” or 1/4” or 6 mm compression tube fittings in AISI 316

Available KF40 connection (only safe area)

Weight

about 0,8 kg

Weitere Infos

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.


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