Land-Oxygen analyzer Systems ( Model: WDG 1200 & 1210 )

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The WDG Series from Land were the world’s first fullyintegrated stand-alone, flue gas oxygen analyzers. The Genesis 1200 WDG and the Genesis 1210 WDG are rugged and reliable for net oxygen, and use industry-proven zirconium oxide sensor technology.

The outer probe tube is 310 stainless steel so no abrasion shield is needed for most applications.

The integrated/remote controller features precision temperature control for optimum stability, built-in diagnostics, and overtemperature protection. Modbus and 4-20 mA outputs are standard; automatic calibration is available.

Key Features

– Simple Installation and Operation

– 4-key user interface controls all functions

– Service and maintenance carried out on site

– All parts are field replaceable

– Straightforward integration in plant control system

– Measurement systems for most applications

– Wide range of options available

– Outstanding sensor reliability – 2 year warranty

  Key Benefits

– Simple User Interface

  Simple push-button operation combined with a clear LED display enable complete electronic control of the probe functions. Full setup and diagnostic information is also accessible through the user interface.

– Easy Maintenance

  The WDG 1200 is completely field – serviceable. The uniquedesign allows the inner tube structure to be completely removed forservicing, leaving the outer protection tube attached to the process.

– Modbus Communications

  Probes can communicate using the RS485 Modbus protocol,for straightforward integration into the plant DCS. There are also both 4-20 mA analog and relay outputs.

– Unique Flexibility

  Uniquely mounts the user interface onto the probe itself. This enables complete local control at the measurement location and reduces installation costs. Alternatively, a remote user interface can be supplied.

– Versatile Probe and Mounting

  Oxygen probes are available in various lengths with a range of mounting flange options. The dust-protection filter screws into the end of the probe and prevents the sensor from being damaged by flyash. 


Genesis WDG 1200 & WDG 1210 Probe 
Measuring Range: From 0 to 1 %, 0 to 25 % O2 v/v
Accuracy: ±1 % of measured value or ±0.05 % oxygen, whichever is greater
Response Time: < 3 secs to calibration gas 63% of a process step change, 20 secs
Drift: < 0.1 % of cell output per month (< 0.005 % O2 per month with 2 % O2 applied)
Linearity: ±1 % of output span
Repeatability: ±1 % of output span
Max Flue Gas Temperature: 1250 °F (677 °C)
Sample Pressure: ±2 psig (± 13.8 kPa)
Ambient Temp.: -5 to 160 °F (-20 to 71 °C)
Relative Humidity:10 % to 90 %, non-condensing
Calibration Gas Requirements:

Use all calibration gases @ 10 psig, 3 to 6 scfh (0.70 kg/cm2, 1.41 to 2.82 L/min)

O2 Span Gas: Air or from 1.0 % to 100 % O2,balance N2

O2 Zero Gas: 2 % or from 0.1 to 10% O2,balance N2

Calibration: Manual, automatic and remote trigger

Calibration: Manual, Automatic and remote trigger

Note: Performance characteristics are referenced to calibration gas, with all process variables

constant and range of 0 to 10% oxygen

Genesis WDG 1220 Remote Control Unit

Probe Control Unit 
Display / Keypad: Single-line, 4 digit LED, 4 keys
analog Outputs: Single channel isolated. Max. impedence 500 ohms. Current loop isolation is 1000 V ms
Alarms: SYstem Fault, Maintenance, Calibration in Progress – single pole form C 2A at 30 V ac/dc
Communications Modbus, isolated RS-485 2 wire
Environment: Ambient Temp.: -5 to 160 °F (-20 to 71 °C)
Relative Humidity: 10 % to 80 %, non-condensing
Enclosure: IP65 and NEMA 4X
Power Requirements: Nominal 115-230 Vac ±10 %, 47-63 Hz;
4 A 6mm female thread for earth grounding
System Compliance: EMC directive 89/336/EEC
Low Voltage Directive 73/23/EEC, CE

Genesis WDG 1270 Auto-Calibration Unit

AutoCal Unit
Dimensions:(hxwxd) 300 x 200 x 155 mm / 11.8” x 7.9” x 6.1”
Weight: 6 kg / 13.2 lbs.
Operating Temperature: 32 – 122 °F / 0 to 50 °C
Enclosure Rating: IP65 / NEMA 4 Protection
Power Supply: Selected to 110 v or 230 v a.c. 50-60 Hz 10VA
Supply Tolerance:  -10 %, +20 %
Gas Inlet Pressure: 25 – 30 psi (1.7 to 2.0 bar)
Gas Outlet Flow: 3 to 6 scfh (1.6 to 2.8 l/min)
Pressure Switch: 15 psi (1.0 bar) trip pressure
Span (slave) Relays: 2 x galvanically free changeover relay contacts
Control Interface: Single 8 core hard wire lead to Genesis Control Unit
Fuse Rating: 125 mA @ 230v antisurge, 250 mA @ 110v antisurge
Isolation Switch Rating: 240V 1A (customer supplied)
Installation: Category II
Overvoltage: Category II


– Gas, oil or coal fired boilers

– Power generation


– Petrochemicals

– Process industries

– Pharmaceuticals

Resource & Download

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