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LC-450A Advanced Oxygen Analyser

Low sub ppm Pumped Oxygen Analyser

The LC-450A from Toray Engineering D Solutions, Co., Ltd., is a highly advanced, high performance Zirconia Oxygen Analyser. Toray Engineering have been at the forefront of Zirconia Oxygen Analyser design for over 30 years.

The LC-450A  has very high levels of durability and reliability. It combines this with a desirable set of features, making it ideal for many applications in the electronics as well as process control industries

A Model: 240VAC 

D Model: 24VDC 


Product Features

Zirconia ceramic cell: 

Toray Engineering Oxygen Analysers determine oxygen concentration by using the conductivity of a Zirconium ceramic cell. Zirconium ceramic cells allow only oxygen ions to pass through at high temperatures. The Instrument uses a reference gas on one side and sample gas on the other. Oxygen ions move from the side with the highest concentration to that with the lowest concentration. This movement of ions generates an Electro Motive Force (EMF) which is measured to determine oxygen content. This process is in accordance with the Nernst Equation.

The LC-450A has a fast response time (T90 within 30 secs) with minimal line lag. Customers value these features highly. Typical Applications are in residual oxygen monitoring for 3D metal printers, semiconductor vacuum deposition systems, baking furnaces and Coating machines.

Unique Sensor technology : 

A key feature of the Toray LC-450A is it’s unique sensor coating resulting in very high reliability and durability.  This allows users to experience much longer sensor life in addition to calibration down time when compared with other solutions. Users can obtain significantly lower lifetime operating costs as a result. The sensor technology also creates a lower sensor resistance which results in extremely reliable, repeatable, accurate and precise readings over time. A feature customers find particularly desirable in an Oxygen Analyser.

The LC-450A is designed to Monitor oxygen with a very wide range from low ppm (1 ppm) up to 100% Volume Oxygen, (Values less than 1 ppm are possible, but aren’t guaranteed, and are considered reference values).

Users find the LC-450A is easy to install in addition to having a wide power supply range of 100-240VAC . A 24VDC Version is also available.


Weatherall is the United Kingdom and European authorised sales and service agent for Toray Engineering D Solutions, Co., Ltd. Oxygen Analysers using Toray’s unique Zirconium Ceramic cells. For other international service locations please see Maintenance Locations


Type Portable or Panel Mounted
Display Digital 4-digit 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 – 10-0 atm
*Values less than 1 ppm are reference values (not guaranteed)
Sampling Method Continuous suction using a built-in pump
Supply Gas Rate Approx. 1.5 L/min
Sensor Gas Rate 60 ±10 mL/min
Gas Connection INLET (sample gas inlet): Rc1/4
BYPASS OUT (bypass outlet): Rc1/4
OUTLET (sample gas outlet): Rc1/4
Reference Gas Air
Dimensions 210(W) × 134(H) × 300(D) mm
Weight Approx. 6 kg
Paint Colour 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)
Recorder output External output: 4-20 mA or 0-20 mA (DC 0-10 V 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 29 kPa max.
Flow rate: 1,000-2,000 mL/min
Temperature: 50 °C max.
Humidity: Dew point lower than ambient temperature
Power supply Voltage: 100-240 VAC, (35 VA, when steady supply)
Installation 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

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