Low Concentration Measurement General-Purpose Type LC-450D

The high-performance LC-450D zirconia oxygen analyzer was developed based on Toray Engineering's long track record of excellence and experience, and enables measurement ranging from low concentrations to 100% oxygen concentration with a single device.
This analyzer is equipped with our unique, ultra-compact zirconia sensor to enable stable and highly accurate measurement over the long term, and the oxygen sensor has been specially treated to achieve unprecedented durability. This is an easy to operate, compact oxygen analyzer which is ideal for integration into semiconductor/LCD equipment and other types of equipment.


♦ Measurement over a wide range of concentrations
Can display concentrations ranging from the ppm level to 100%.
♦ Improved sensor durability
The oxygen sensor has been specially treated for improved durability.
♦ DC driven
DC24V makes it easier to integrate the unit into other equipment. (AC power specifications are also available.)
♦ Compact and easy to set up
Since the unit is shorter in the depth direction than our previous model, it takes up less space.
♦ RoHS compliant
♦ CE marking declaration of conformity

Principle of Measurement

Toray zirconia oxygen analyzers determine oxygen concentration using the ion conductivity of a zirconia ceramic cell. Zirconia ceramic cells only allow oxygen ions to pass through at high temperatures. With reference gas on one side and sample gas on the other, oxygen ions move from the side with the highest concentration of oxygen to that with the lowest concentration. The movement of ions generates an EMF (Electro Motive Force) which can be measured to determine the oxygen content. This is in accordance with the Nernst equation.

Principle of Measurement


Equipment Specifications

Type Portable or panel-mounted
Display system 4-digit digital display (O2 concentration)
Measurement range Display: Auto range or 4 ranges
Recorder: 0-10 / 100 / 1000 ppm / 100 %
The following ranges can be used in any combination.
1 / 10 / 100 / 1000 / 10000 ppm
1 / 10 / 100 %, 10-20-10-0atm
*Values less than 1 ppm are reference values (not guaranteed)
Sampling system Continuous suction using built-in pump
Supply gas rate Approx. 1.5 L/min
Sensor gas rate 60 ±10 mL/min
Gas connection INLET (Sample gas inlet): Rc1/8
BYPASS OUT (Bypass outlet): Rc1/8
OUTLET (Sample gas outlet): Rc1/8
Reference gas Air
Dimensions 240(W) × 134(H) × 210(D) mm
Weight Approx. 5 kg
Paint color Matte black


Repeatability Within ±1 % of full scale (at or above 0-10 ppm range)
(Not guaranteed for the 0-1 ppm display range or below)
Air point stability Within ±1 % of full scale/24 hours
Gas response Within 30 sec (90 % response)

Engineering Specifications

Recorder output External output: 0-10 V (4-20 mA is optional)
Communication output RS-232C standard (unidirectional)
Contact output Equipment error (No-voltage contact)
Concentration error (No-voltage contact)
Warmup signal (No-voltage contact)
[Contact capacity: DC/AC30V, 0.5A max.]
Range marker output 2-point output (Voltage contact)
[Contact capacity: DC/AC 30 V, 0.3 A max.]
Self-diagnosis functions Sensor temperature error, Calibration error, Internal temperature error
CPU error, Furnace temperature error, Warmup error
Asymmetry potential error, Sensor resistance error
AIR point calibration error
SPAN point calibration error
Sample gas conditions Must not contain flammable components, halogen, silica, corrosive components or water droplets.
Pressure: Pressurized at 29kPa max.
Flow rate: 1,000-2,000 mL/min
Temperature: 50 °C max.
Humidity: Dew point lower than ambient temperature
Power supply Voltage: DC24 V ±10 %, (30 VA, steady supply)
Set up conditions Set up location: Indoors, Non-explosion-proof zone
Ambient temperature: 0-40 °C
Ambient humidity: 45-85 %RH, No condensation
Equipment options Activated carbon filter, Sintered metal filter


Low Concentration Measurement General-Purpose Type  LC-450D
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Relevant web pages
Principle of Measurement of Zirconia Oxygen Analyzers
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